Can't break 700Kh/s with 280X Dual-X OC (11221-00-20G)

[mezza550]

Hi everyone,

(TL;DR Stuck at sub 700 with 11221-00-20G. Trying for a solid week with little improvement... Feel like I've tried everything... please help!)

Just a quick note before I start, this is concerning the Sapphire Radeon R9 280X Dual-X OC (11221-00-20G) graphics card. There are many flavors of 280X cards out there, some very similar yet it seems to me that any advice that's not directly tailored to the 11221-00-20G doesn't help (or at least hasn't so far) So if we can please keep discussion here limited to that card (and not 7970's, Asus 280X's... etc. etc.) I would greatly appreciate it.

I've spoken with many people at other sites, and met many people who have had similar issues in the past, but I cannot seem to find anyone who hasn't been able to resolve their initial difficulty getting their 11221-00-20G GPU's running at optimal performance. I've read that some people get them going up to the 740 range. Some people even get 700+ right out the box (say what!!?)

I am running 3 cards right now and the fourth one will be installed in a day or two. Presently they are topping out at 670-680Kh/s each. Not terrible and much better than I had at first, but obviously I'm missing out on at least 60Kh for each card and want to make the most out of the electricity they are consuming.

To begin with, here is my hardware setup: https://docs.google.com/spreadsheet/ccc?key=0AsTxUyvOU-ZtdFFTcWszR0dBOEFEY2RSYVZxbTVRTnc&usp=sharing

Computer has Windows ultimate x64 installed, no unnecessary software installed in addition (except chrome because ie can suck it!!)

Drivers and SDK:
13.250.18.0 & AMD APP SDK 2.9

Should I try using older drivers? Older SDK?

Miner:
Most all of my tests have involved using cgminer 3.7.2. However I started using sgminer 4.0.0 a few days ago and saw my performance increase about 20Kh/s per card (moving from 660ish to 680ish). Also running CGWatcher to ensure miner stays alive when I'm away.

Am I using the right miner??

Miner .bin and files:
I've downloaded several .bin files but unfortunately I haven't found any yet that made any meaningful difference. And some made my hash rate plummet.

Vbios:
It sounds like this isn't something that I should need to mess with, but I have experimented regardless since I had tried almost all other options. I'm using the bios that the cards come with right now (015.042.000.001.000000) because it has given me the best performance. I installed older versions but saw either no gains or major losses. (Tried 015.041 and 015.039 as well as some customized bios from the_stilt, to no avail)

Settings:
I've tried many, many configurations. Self experimentation as well as input from other members here and on Reddit. To date the best configuration I've found is this one:

--lookup-gap 2 --thread-concurrency 8192,8192,8192 -g 2 -I 13 -w 256 --auto-fan --gpu-fan 30-85,30-85,30-85 --temp-cutoff 90,90,90 --temp-overheat 85,85,85 --temp-target 75,75,75 --gpu-memclock 1500,1500,1500 --gpu-engine 1030,1030,1030 --gpu-powertune -20,-20,-20 --expiry 15 --scan-time 15 --queue 0

I haven't seen any real difference when I mess with these settings. Thread concurrency (8192 vs. 11200), Gpu-engine (anything outside of 1020-1040 seems to reduce hashrate) gpu-memclock (doesn't seem to matter what this is, nothing changes up or down when I adjust)

Power / Cooling:
My rig is powered by two 750watt EVGA psu's, connected with an add2psu device (as listed in my google doc), and each powersupply is providing energy for two cards at the most (currently 2 on one and 1 on the other, until I setup the 4th card anyways). Also my pci riser cables are each powered. I also have a box fan directly on the rig 24/7, and my sgwindow tells me that the cards are staying around 73C. So I'm pretty sure nothing is wrong here, but I'm listing it out just in case.

Voltage & Under volting, etc:
I am not doing this at present.

So that's it... It seems to me like I'm not dealing with faulty hardware since I have three of these cards all more or less performing the same. Whenever I've been stuck like this with computer problems previously, I usually find out that I made some false assumption in the way I did things, or that something obvious was wrong that I just need to fix that one thing before everything goes right. Whether it's building a Hackintosh or troubleshooting a python script- the answer usually slaps me in the face one day and I thinking to myself "Well obviously..." But thus far it hasn't happened and I feel like I'm running out of options to try.

Any input would be more than appreciated! Thanks

[1714833213]

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[1714833213]

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[1714833213]

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[Gunther]

Interesting topic, will watch.

[kikeda]

I have 2 .42 bios vapor x and they have been doing fine out of the box, also don't downgrade to .41 since people are experiencing issues on vrm throttling on .41 bios.

Whats your CPU? lowend like sempron?

[crazyates]

Change your powertune from -20 to +20. I always run mine at +20.

[mezza550]

I have 2 .42 bios vapor x and they have been doing fine out of the box, also don't downgrade to .41 since people are experiencing issues on vrm throttling on .41 bios.

Whats your CPU? lowend like sempron?

Yup, sempron cpu (should have no impact on gpu performance though... right?)

For bios, to be clear, you're saying to use the bios for the vapor-x card on these sapphire cards right? The 11221-00-20G's.

[uranian]

Change your powertune from -20 to +20. I always run mine at +20.

how does that affect the watts that the cards draw? i'm not sure i understand how undervolting the cards and the powertune settings affect each other.

[uranian]

mezza, read this thread:

https://litecointalk.org/index.php?topic=12369.0

it helped me (after weeks of frustration) get my 7970 (which is basically the same as your 280x card, i believe) from 550kh/s to 750kh/s. it's crappy BIOS settings in the cards; there's a member there who has written a bunch of new BIOS settings that much improve the cards. as long as you have the ability to boot from USB, you can always reflash the BIOS, so while bricking the card is temporary PITA, it's not hard work to just flash again. just make you save your original working BIOS in case everything goes south and you end up at 0 kh/s

oh, read the OP, eh? sorry, i see you've seen the stilt's BIOS updates. can't help then, sorry.

[mezza550]

oh, read the OP, eh? sorry, i see you've seen the stilt's BIOS updates. can't help then, sorry.

Hey Uranian, Actually what I did in that case was download a Stilt modified bio that was for a different person who said they had the same card. Ended up making that card completely non-functional, until I switched the bios switch to the UEFI setting on the card after which it became recognized again. It's possible that that resulted because I wasn't using bios specifically modified for my card though(?). Also, are you saying that using those modified bios was solely responsible for your +200Kh/s increase?

thanks for your input

[ozkraut]

try 8191 with 1065/1500. Getting +_ 750 stable for days. Just going fom 8192 to 8191 got me +100kh

[Victoo]

mezza, read this thread:

https://litecointalk.org/index.php?topic=12369.0

it helped me (after weeks of frustration) get my 7970 (which is basically the same as your 280x card, i believe) from 550kh/s to 750kh/s. it's crappy BIOS settings in the cards; there's a member there who has written a bunch of new BIOS settings that much improve the cards. as long as you have the ability to boot from USB, you can always reflash the BIOS, so while bricking the card is temporary PITA, it's not hard work to just flash again. just make you save your original working BIOS in case everything goes south and you end up at 0 kh/s

oh, read the OP, eh? sorry, i see you've seen the stilt's BIOS updates. can't help then, sorry.

It's a helpful thread.

[c275]

copy that config

https://bitcointalk.org/index.php?topic=443809.msg5010532#msg5010532

[uranian]

oh, read the OP, eh? sorry, i see you've seen the stilt's BIOS updates. can't help then, sorry.

Hey Uranian, Actually what I did in that case was download a Stilt modified bio that was for a different person who said they had the same card. Ended up making that card completely non-functional, until I switched the bios switch to the UEFI setting on the card after which it became recognized again. It's possible that that resulted because I wasn't using bios specifically modified for my card though(?). Also, are you saying that using those modified bios was solely responsible for your +200Kh/s increase?

thanks for your input

not just the BIOS; I was surprised that the thread concurrency made a massive difference when I'd flashed the BIOS. Even after the BIOS update, if I didn't use exactly the settings recommended by stilt, my hash rate didn't change. I had to use both the BIOS update and the exact settings he recommended to get the 200kh/s extra. Good luck with your card, I understand your frustrations. I'm wondering about buying exactly some of the card you have in a week or 3, so keeping an eye on this thread with interest. Did you try crazyates' suggestion about the powertune settings? He appears to know what he's doing.

[kikeda]

I have 2 .42 bios vapor x and they have been doing fine out of the box, also don't downgrade to .41 since people are experiencing issues on vrm throttling on .41 bios.

Whats your CPU? lowend like sempron?

Yup, sempron cpu (should have no impact on gpu performance though... right?)

For bios, to be clear, you're saying to use the bios for the vapor-x card on these sapphire cards right? The 11221-00-20G's.

does your hashrate drop when you use your desktop? like opening a browser or setting trixx and etc?

[mezza550]

Change your powertune from -20 to +20. I always run mine at +20.

Thanks for this, but unfortunately adjusting it in to the positive didn't have any real impact. 

[mezza550]

try 8191 with 1065/1500. Getting +_ 750 stable for days. Just going fom 8192 to 8191 got me +100kh

Hey Ozkraut, I'm using your settings now and am sitting pretty stable around 675ish. I'll let it run a few hours and see if it gradually moves up or stabilizes. If anything, your post confuses me more than ever- 8191? But whatever, if it works, I don't care!

[mezza550]

It's a helpful thread.

As it happens, I posted in that thread yesterday and Stilt responded today telling me that my bios do not need adjustment. I followed up with a question about my settings but so far no response from him. I was surprised that there was no room for improvement, because my performance profile matches his OP description of underperforming 280X cards almost exactly. The quest continues... I just hope I'm not at retirement age by the time I get this &!%@!! rig working at full performance.

[ozkraut]

try 8191 with 1065/1500. Getting +_ 750 stable for days. Just going fom 8192 to 8191 got me +100kh

Hey Ozkraut, I'm using your settings now and am sitting pretty stable around 675ish. I'll let it run a few hours and see if it gradually moves up or stabilizes. If anything, your post confuses me more than ever- 8191? But whatever, if it works, I don't care!

Yeah it's funny. 8192 gets me high 500's early 6's. Just that one less gets it going. Same problem for even higher for higher values in the 11000 / 16000 bracket. Anything from 380 to 485. Maybe something doesn't flush properly and leaving a little scratch space free to go at all times might be it. Bute really I have no idea. 675 is still a bit low though. Windoze or linux ? I'm talking sgminer / cgminer under bamt 1.3 here. With G2 btw, I 13

[mezza550]

copy that config

https://bitcointalk.org/index.php?topic=443809.msg5010532#msg5010532

I wish! I copied those settings and my hash rate plummeted down to 400Kh/s :-/

[mezza550]

Yeah it's funny. 8192 gets me high 500's early 6's. Just that one less gets it going. Same problem for even higher for higher values in the 11000 / 16000 bracket. Anything from 380 to 485. Maybe something doesn't flush properly and leaving a little scratch space free to go at all times might be it. Bute really I have no idea. 675 is still a bit low though. Windoze or linux ? I'm talking sgminer / cgminer under bamt 1.3 here. With G2 btw, I 13

I'm running Win7x64 Ultimate, using SGMiner 4.0.0. Also just so we're on the same page, you're using the same card as me, the 11221-00-20G right?

BAMT might be something I'll look in to next if I run out of options completely (headed there fast...) I'm a total linux noob though and won't know what to do if I run in to configuration issues. When you install BAMT, it's not actually overwriting anything on the hard drive right? So in theory I could just run bamt on a usb stick and then if I needed to switch back to Microsoft land I could simply reboot and remove the usb drive?

[mezza550]

not just the BIOS; I was surprised that the thread concurrency made a massive difference when I'd flashed the BIOS. Even after the BIOS update, if I didn't use exactly the settings recommended by stilt, my hash rate didn't change. I had to use both the BIOS update and the exact settings he recommended to get the 200kh/s extra. Good luck with your card, I understand your frustrations. I'm wondering about buying exactly some of the card you have in a week or 3, so keeping an eye on this thread with interest. Did you try crazyates' suggestion about the powertune settings? He appears to know what he's doing.

Thanks for the sympathy, at this point I'll take anything I can get, lol. 650-675 isn't terrible and I'll still see a ROI with this setup in ~4 months, but it just bugs me that there are potential K-hashes left on the table. I guess we can categorize this one under 'first world problems' eh?

I did try crazyates suggestion, but it didn't make any difference as far as I'm aware. Not sure exactly what powertune does still- it's like wiggle room for the miner to increase or decrease the gpu-engine setting right?

[ozkraut]

Yeah it's funny. 8192 gets me high 500's early 6's. Just that one less gets it going. Same problem for even higher for higher values in the 11000 / 16000 bracket. Anything from 380 to 485. Maybe something doesn't flush properly and leaving a little scratch space free to go at all times might be it. Bute really I have no idea. 675 is still a bit low though. Windoze or linux ? I'm talking sgminer / cgminer under bamt 1.3 here. With G2 btw, I 13

I'm running Win7x64 Ultimate, using SGMiner 4.0.0. Also just so we're on the same page, you're using the same card as me, the 11221-00-20G right?

BAMT might be something I'll look in to next if I run out of options completely (headed there fast...) I'm a total linux noob though and won't know what to do if I run in to configuration issues. When you install BAMT, it's not actually overwriting anything on the hard drive right? So in theory I could just run bamt on a usb stick and then if I needed to switch back to Microsoft land I could simply reboot and remove the usb drive?

yep boot straight of usb. Pretty straight forward if you diligently follow instructions and make sure any update / install is preceded by a system update and no error messages throughout.

nope not the exact same card: R9 280X Vapor-X X 2 at my end, running 748 stable at 69 day / 53c night in Australia in Summer. Milkcrate. Well aired and separated. Sucked & blown by additional help. Just how I like it (;-)



these configs exactly:

]

,
"intensity" : "13,13",
"vectors" : "1",
"worksize" : "256",
"kernel" : "scrypt",
"lookup-gap" : "2",
"thread-concurrency" : "8191,8191",
"shaders" : "0",
"api-port" : "4028",
"expiry" : "120",
"gpu-dyninterval" : "7",
"gpu-platform" : "0",
"gpu-threads" : "2",
"gpu-engine" : "1060,1065",
"gpu-memclock" : "1500,1500",
"gpu-powertune" : "0,0",
"gpu-fan" : "70,70,100,100",
"temp-cutoff" : "90",
"temp-target" : "79",
"log" : "5",
"no-pool-disable" : true,
"queue" : "1",
"scan-time" : "60",
"scrypt" : true,
"shares" : "0",
"kernel-path" : "/usr/local/bin"
}

[mezza550]

nope not the exact same card: R9 280X Vapor-X X 2 at my end, running 748 stable at 69 day / 53c night in Australia in Summer. Milkcrate. Well aired and separated.

Ah, that might explain it. Different cards, different results. At any rate, your config has given me a solid 675 for each card over the last 24 hr period, so thanks for that.

Sucked & blown by additional help. Just how I like it (;-)

I lol'd.

[NameTaken]

I also have Sapphire 280X Dual-X OC (11221-00-20G)s and am happy with 750KH/s I'm getting out of them. 710KH/s was the limit on how much I was able to get out of them out of the box.

First thing I did was download then flash a recompiled and optimized BIOS with 1065MHz core as anything higher than 1070 reduced the hashrate.
Then I downloaded a recompiled and optimized scrypt130511.cl plus scrypt130511Tahitiglg2tc8192w256l8.bin for SGMiner.

[mezza550]

I also have Sapphire 280X Dual-X OC (11221-00-20G)s and am happy with 750KH/s I'm getting out of them. 710KH/s was the limit on how much I was able to get out of them out of the box.

First thing I did was download then flash a recompiled and optimized BIOS with 1065MHz core as anything higher than 1070 reduced the hashrate.
Then I downloaded a recompiled and optimized scrypt130511.cl plus scrypt130511Tahitiglg2tc8192w256l8.bin for SGMiner.

Your performance rates sound fantastic. Would you mind sharing those files (bios, .c and .bin files) via dropbox or similar? Also what type of memory do your cards have?

[NameTaken]

I also have Sapphire 280X Dual-X OC (11221-00-20G)s and am happy with 750KH/s I'm getting out of them. 710KH/s was the limit on how much I was able to get out of them out of the box.

First thing I did was download then flash a recompiled and optimized BIOS with 1065MHz core as anything higher than 1070 reduced the hashrate.
Then I downloaded a recompiled and optimized scrypt130511.cl plus scrypt130511Tahitiglg2tc8192w256l8.bin for SGMiner.

Your performance rates sound fantastic. Would you mind sharing those files (bios, .c and .bin files) via dropbox or similar? Also what type of memory do your cards have?

Here is where I got the files from.

https://litecointalk.org/index.php?topic=12369.90

http://www.reddit.com/r/dogemining/comments/1uj4uk/optimized_scrypt_kernel_for_hd7970_r9_280x/

http://fs1.d-h.st/download/00099/G2D/ati_winflash_2.6.7.7z

[Alexandros]

hi guys!
i have the same card and had exactly the same problem. I couldn't reached more than 660Kh/s with all different combinations in the configuration file. Then i realised that I was using 14.1 beta version of catalyst. DO NOT install it! I've downgraded to 13.11 and I got up to 720Kh/s with bios 015.041.000.000 (the default one). I had to change the conf file before, since the one I was using did not improve my hashrate. So i changed thread-concurrency from 8192 to 14336 and gpu-engine from 980 to 1065. I kept the gpu-memclock to 1500. And now I've just noticed that I got 10kh/s more just by replacing the scrypt130511.cl that NameTaken mentioned! Thanks about that mate!!!!

I hope that will work for you too,
happy mining to all!
 

[mezza550]

Here is where I got the files from.

https://litecointalk.org/index.php?topic=12369.90

http://www.reddit.com/r/dogemining/comments/1uj4uk/optimized_scrypt_kernel_for_hd7970_r9_280x/

http://fs1.d-h.st/download/00099/G2D/ati_winflash_2.6.7.7z

Awesome, I'll try this tonight and report back here. Just to be clear, you used the bios that The_Stilt posted in reply #102, correct? This one: https://www.dropbox.com/s/jfmog1a8inexrvy/Sapphire_E24900-O46_AGR.zip

Asking because I flashed one of my gpus with some bios from his thread about a week ago and it bricked it until I used the physical bios switch on top of the card. Trying to be more cautious.

thanks!

[12gaFacelift]

My card:

2x Gigabyte Radeon R9 280X 3GB GDDR5 (Windforce x3) OC GURU II
2x Sapphire Radeon R9 280X 3GB GDDR5 Vapor-X

My Setting:

"intensity" : "13,13",
"vectors" : "1",
"worksize" : "256",
"kernel" : "scrypt",
"lookup-gap" : "2",
"thread-concurrency" : "8191",
"shaders" : "2048",
"gpu-dyninterval" : "7",
"gpu-platform" : "0",
"gpu-threads" : "2",
"gpu-engine" : "1060,1065",
"gpu-memclock" : "1500,1500",
"gpu-powertune" : "-20",
"gpu-fan" : "80",
"drink-refill" : true,

742Kh/s and stable.

[ozkraut]

My card:

2x Gigabyte Radeon R9 280X 3GB GDDR5 (Windforce x3) OC GURU II
2x Sapphire Radeon R9 280X 3GB GDDR5 Vapor-X

My Setting:

"intensity" : "13,13",
"vectors" : "1",
"worksize" : "256",
"kernel" : "scrypt",
"lookup-gap" : "2",
"thread-concurrency" : "8191",
"shaders" : "2048",
"gpu-dyninterval" : "7",
"gpu-platform" : "0",
"gpu-threads" : "2",
"gpu-engine" : "1060,1065",
"gpu-memclock" : "1500,1500",
"gpu-powertune" : "-20",
"gpu-fan" : "80",
"drink-refill" : true,

742Kh/s and stable.

" Drink-refill" : true,   eh? Must put that in my config now and see what happens. If it works I shall patch a '"hard-suck" : true,
just in case (;-)

[uranian]

I did try crazyates suggestion, but it didn't make any difference as far as I'm aware. Not sure exactly what powertune does still- it's like wiggle room for the miner to increase or decrease the gpu-engine setting right?

ha if you do find out exactly what powertune does, let me know, i'm still wondering 

[mezza550]

I applied the modified .BIN and .CL files last night, and my hash rate improved marginally by about 5-10Kh. Haven't had a chance yet to flash the bios, but will try soon.

Interestingly not all of my cards are performing at the same level, GPU0 consistently beats out the rest at an avg 690 now. GPU1 and 2 are around 675 and GPU3 doing the worst at 665.

[NameTaken]

On a side note, the 280Xs that I ordered 3 weeks ago finally just got in stock today

http://www.vuugo.com/sapphire-video-cards-11221-00-20G.html

[mezza550]

Hey everyone, I wanted to share some good results. Thanks to NameTaken I've been able to bump things up:

https://i.imgur.com/XnSNkDF.jpg?1

Just to reiterate, what I did exactly was first switch over to the optimized .BIN files with SGMiner (since I'm running 64bit windows I had to change the last digit in the file name from an "8" to a "4" for sgminer to use the bin). Then I loaded in the optimized .CL file (backed up old .cl file first). I let that run for a few days because I got busy, noticed about a 5-10Kh bump overall, up to an average 675-680Kh per card. Then as of last night I went ahead and flashed my cards with the bios that NameTaken pointed me to, and that finally allowed me to break the 700 barrier. The screenshot above is from this morning after the rig had been running for about 7 hours. (links for all files below)

It's interesting but my GPU 2 card has now become the best performer whereas before it was GPU 0. I'm getting a very reliable 720Kh out of it. Meanwhile GPU 3 is doing the worst at 685ish. I didn't have much time because I was getting really tired, but I did mess around a little with the gpu-engine settings and right now I have it set as "--gpu-engine 1065,1075,1080,1030". Yup, doesn't look like a good config does it? But that seems to be my sweet spot (so far). GPU 2 loves the extra engine speed, it jumps 10Kh when I move from 1065 to 1080. And it's the reverse for GPU 3, which either does nothing or goes down when I go over 1030. But I do need to play around with it a bit more, maybe next week.

I've been trying to find the optimal GPU temperature also. I notice that at 75C the cards definitely throttle back a bit. I have it set to 68C as a target right now but I may be going to far and wasting energy on fans (any thoughts?)

I'd still like to see if I can inch things up a bit faster than this. But I am very pleased with the results (and thanks to everyone who helped!). Later on I'm going to try and trouble shoot GPU 3 and also see if GPU 0 & 1 can't do more. Then I'd like to do some voltage experiments to decrease the power. I also have an average rejected share rate at about 3-4% which I think I could lower too (although I have no clue where to start).

• BIN file thread: http://www.reddit.com/r/dogemining/comments/1uj4uk/optimized_scrypt_kernel_for_hd7970_r9_280x/
• BIN file direct link: https://drive.google.com/file/d/0B_EJYw4JvsnvazdqQW5DWTVzcFU/edit?usp=sharing
• .CL file (it's inside the zip in a folder called "files"): http://fs1.d-h.st/download/00099/G2D/ati_winflash_2.6.7.7z
• BIOS file direct link: https://www.dropbox.com/s/jfmog1a8inexrvy/Sapphire_E24900-O46_AGR.zip (don't use atiwinflash, use atiflash at DOS prompt (need to make usb DOS boot drive))
• ATIFLASH 3.99 (I was advised to use this version of the app, not the latest one): http://www.techpowerup.com/downloads/2166/atiflash-3-99/

Here is my current config that results in the screenshot above:

Code:

--lookup-gap 2 --thread-concurrency 8192,8192,8192,8192 -g 2 -I 13 -w 256 --auto-fan --temp-cutoff 90,90,90,90 --temp-overheat 85,85,85,85 --temp-target 68,68,68,68 --gpu-memclock 1500,1500,1500,1500 --gpu-engine 1065,1075,1080,1030 --expiry 1 --scan-time 1 --queue 0

I left out Powertune for now although I'm going to experiment and see if it changes anything. Also might experiment again with thread concurrency in the 11200 range. Will post back with results. Oh, and one last thing- I noticed that CGWatcher does some damage to my hashrate because it is always pinging the GPU's for information. I was able to solve this by changing the monitor from checking in every 10 seconds to every 180 seconds (every 3 minutes). This seems like a good fit because I still have the benefits of CGWatcher being able to reboot the miner if something goes wrong.

Comments / critique / whatever welcome.

[NameTaken]

I added another 11221-00-20G which seems to be the most stable at 1045MHz core for 730-735KH/s which I'm content with.

http://oi57.tinypic.com/j9yflv.jpg

[mezza550]

Quick update, I noticed today that my high performing card (GPU 2) has SK-Hynix based RAM, the other three lower performers use Elpida. Not sure what this means for me going forward, but it's a clue. Starting to feel like a detective over here Input welcomed!

[tolich94]

Quick update, I noticed today that my high performing card (GPU 2) has SK-Hynix based RAM, the other three lower performers use Elpida. Not sure what this means for me going forward, but it's a clue. Starting to feel like a detective over here Input welcomed!

I think the Elpida RAM is lower quality than Hynix, at least that's what I've read somewhere on some forum. And lucky me (sarcastic) ofc I got the Eplida RAM in my GPU.

[CryptoMer]

I've got some Sapphire 280X Dual-X cards as well, though I don't recall if they're from the 20G batch or 25...

In any event, as you're already on Windows, download GPU-Z and check the VRM1 temperature (it's at the very bottom of the graphs). This run of card has a throttles itself as soon as the VRM hits 110C, which it will do on stock settings, even if it's all alone in an open-air case...

My fix: Undervolt the stupid things to 1085mv, run at 900 mem clock, space them out at least three inches from each other, and push air over them via a box fan. I have NO idea how these cards are going to perform in the summer, but I'm fearful.

My steady KH per card: 730

[crazyates]

Quick update, I noticed today that my high performing card (GPU 2) has SK-Hynix based RAM, the other three lower performers use Elpida. Not sure what this means for me going forward, but it's a clue. Starting to feel like a detective over here Input welcomed!

I think the Elpida RAM is lower quality than Hynix, at least that's what I've read somewhere on some forum. And lucky me (sarcastic) ofc I got the Eplida RAM in my GPU.

I have a BUNCH of Elpida 280x. They're Gigabyte, not Sapphire, tho. We have them hashing at 740-755kh/s. Granted the Hynix ones do 775+, but you should be able to do more than an even 700.

[FortuneSeeker]

Where did you get sgminer from?  I keep reading about 'building' it and feel out of my depth.  I think i've downloaded it but it doesn't have as many files in the directoy as cgminer does making me think i've missed something, even though the program opens at least. Also did the .cl files just get copied into the sgminer directory?

finding this very helpful if a little over whelming for such a newbie!

[ozkraut]

Where did you get sgminer from?  I keep reading about 'building' it and feel out of my depth.  I think i've downloaded it but it doesn't have as many files in the directoy as cgminer does making me think i've missed something, even though the program opens at least. Also did the .cl files just get copied into the sgminer directory?

finding this very helpful if a little over whelming for such a newbie!

try this one. Has scrypt-jane support patched in as well:

https://bitcointalk.org/index.php?topic=463076.msg5114275#msg5114275

[FortuneSeeker]

I found it but  now i have another error

Can someone please tell me where I'm getting a problem with this .bat file using sgminer if it matters

color 02
timeout /t 30
setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1
sgminer kernel : scrypt130302 -I 13 --thread-concurrency 8192,8192,8192 --lookup-gap 2 -g 2 -w 256 --gpu-engine 1065,1065,1065 --gpu-memclock 1500,1500,1500 --temp-cutoff 90,90,90 --temp-overheat 85,85,85 --temp-target 68,68,68 --auto-fan --expiry 1 --scan-time 1 --queue 0 -o stratum+tcp://eu.pickaxe.cc:3330 -u Fortuneseeker.warflow1 -p kensei79

I've taken the settings from this guy

https://litecointalk.org/index.php?topic=12369.0;prev_next=next#new < ---this is this thread here I've been lazy and copied this post from anther thread

though i have no idea what the expiry/scantime/queue bit do. but he has the same cards exactly as i do and is getting 700 + hash.  anyway I get the "unexpected extra commandline arguments" error.  I took out the expiry/scan-time/queue parts and got the same thing. I noticed that each card has its own setting and though he has different ones for each card for gpu engine as i'm starting i was keeping mine the same.

any help please

[ozkraut]

I found it but  now i have another error

Can someone please tell me where I'm getting a problem with this .bat file using sgminer if it matters

color 02
timeout /t 30
setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1
sgminer kernel : scrypt130302 -I 13 --thread-concurrency 8192,8192,8192 --lookup-gap 2 -g 2 -w 256 --gpu-engine 1065,1065,1065 --gpu-memclock 1500,1500,1500 --temp-cutoff 90,90,90 --temp-overheat 85,85,85 --temp-target 68,68,68 --auto-fan --expiry 1 --scan-time 1 --queue 0 -o stratum+tcp://eu.pickaxe.cc:3330 -u Fortuneseeker.warflow1 -p kensei79

I've taken the settings from this guy

https://litecointalk.org/index.php?topic=12369.0;prev_next=next#new < ---this is this thread here I've been lazy and copied this post from anther thread

though i have no idea what the expiry/scantime/queue bit do. but he has the same cards exactly as i do and is getting 700 + hash.  anyway I get the "unexpected extra commandline arguments" error.  I took out the expiry/scan-time/queue parts and got the same thing. I noticed that each card has its own setting and though he has different ones for each card for gpu engine as i'm starting i was keeping mine the same.

any help please

I have never specified the kernel just start the script / bat with  ./sgminer under linux or just sgminer under windoze . Rest looks ok assuming you run three cards. Try 8191 for TC. worked for me and got me into the 720's

[mezza550]

I've got some Sapphire 280X Dual-X cards as well, though I don't recall if they're from the 20G batch or 25...

In any event, as you're already on Windows, download GPU-Z and check the VRM1 temperature (it's at the very bottom of the graphs). This run of card has a throttles itself as soon as the VRM hits 110C, which it will do on stock settings, even if it's all alone in an open-air case...

My fix: Undervolt the stupid things to 1085mv, run at 900 mem clock, space them out at least three inches from each other, and push air over them via a box fan. I have NO idea how these cards are going to perform in the summer, but I'm fearful.

My steady KH per card: 730

Thanks CryptoMer, this will be my next line of inquiry with my on-going tests.

[mezza550]

Quick update- I did some more tests this weekend.

• tried Powertune +20, this did pretty much nothing for me (but I'm not ruling it out, it may be configuration dependent. Will experiment with this again later)
• tried --thread-concurrency 11200: Not really any improvement. I keep trying this because I read in a tutorial a few weeks ago that to find your optimal TC number, you should start your miner with no TC argument and then see what it defaults to (found in the file name of the BIN file that's generated). When I do this it always uses 22400. So- since I'm using -g 2 (two threads rather than one), it *should* be 11200 for me. But, apparently it's still not. (may try again later... or maybe tri 11199??)
• tried --thread-concurrency 8191 again: BAM! Hashrates jumped up. Now running a pretty stable 705,710,720,700 avg. hash rates across GPU's 0,1,2,3. Has been running stable for 24+ hrs now.
• 8191 required that I could no longer use the pre-generated 8192 BIN file that I mentioned in previous posts. Seems to have made little or no difference, which makes me wonder if it was really helping initially or not.

https://i.imgur.com/govhIrK.jpg?1

Current arguments are:

Code:

-I 13 -g 2 -w 256 --lookup-gap 2 --thread-concurrency 8191,8191,8191,8191 --gpu-memclock 1500,1500,1500,1500 --gpu-engine 1065,1075,1085,1065 --auto-fan --temp-cutoff 90,90,90,90 --temp-overheat 85,85,85,85 --temp-target 72,72,72,72 --expiry 1 --scan-time 1 --queue 0

Up next, going to experiment with...

• Lowering the voltage via TRIXX to see if I'm dealing with an overheating and therefore throttling VRM issue.
• Ways to increase my WU/s and see if I'm actually getting my money's worth out of my hashrate (if hashrate is doing awesome but WU/s is low, what's the point??)
• Ways to reduce rejected shares (what's the point of having an awesome hashrate if the pool is rejecting your work...??)

Comments always welcome. Thanks for taking the journey with me!

[FortuneSeeker]

Quick update- I did some more tests this weekend.

• tried Powertune +20, this did pretty much nothing for me (but I'm not ruling it out, it may be configuration dependent. Will experiment with this again later)
• tried --thread-concurrency 11200: Not really any improvement. I keep trying this because I read in a tutorial a few weeks ago that to find your optimal TC number, you should start your miner with no TC argument and then see what it defaults to (found in the file name of the BIN file that's generated). When I do this it always uses 22400. So- since I'm using -g 2 (two threads rather than one), it *should* be 11200 for me. But, apparently it's still not. (may try again later... or maybe tri 11199??)
• tried --thread-concurrency 8191 again: BAM! Hashrates jumped up. Now running a pretty stable 705,710,720,700 avg. hash rates across GPU's 0,1,2,3. Has been running stable for 24+ hrs now.
• 8191 required that I could no longer use the pre-generated 8192 BIN file that I mentioned in previous posts. Seems to have made little or no difference, which makes me wonder if it was really helping initially or not.

Current arguments are:

Code:

-I 13 -g 2 -w 256 --lookup-gap 2 --thread-concurrency 8191,8191,8191,8191 --gpu-memclock 1500,1500,1500,1500 --gpu-engine 1065,1075,1085,1065 --auto-fan --temp-cutoff 90,90,90,90 --temp-overheat 85,85,85,85 --temp-target 72,72,72,72 --expiry 1 --scan-time 1 --queue 0

Up next, going to experiment with...

• Lowering the voltage via TRIXX to see if I'm dealing with an overheating and therefore throttling VRM issue.
• Ways to increase my WU/s and see if I'm actually getting my money's worth out of my hashrate (if hashrate is doing awesome but WU/s is low, what's the point??)
• Ways to reduce rejected shares (what's the point of having an awesome hashrate if the pool is rejecting your work...??)

Comments always welcome. Thanks for taking the journey with me!

See I'm even more a newbie than you. what does WU/s do or mean.  I've reduced the VDDC on my 3 cards to 1100/1120/1100 ( the middle card was prevolted at 1225 the 1st and 3rd at 1175 stock which might explain why its needs a high VDDC to remain stable.

What kernel file do you use?  I downloaded the 'optomised' .cl from your earlier post and put it in the kernel folder, but it always seems to use the "ckolivas.cl", if I only leave the optomised .cl file it won't work and putting in "kernel : scrypt130302" into my arguments means sgminer won't work.. so not sure what i'm doing there.

TC 8191 did seem to raise my hash rates up  707K/710kh/s  its the blue bit that i'm taking that from.  My numbers still seem to jump up and down alot though,  does this watcher program help give you an average so you can tell if it really goes up?

[mezza550]

See I'm even more a newbie than you. what does WU/s do or mean.  I've reduced the VDDC on my 3 cards to 1100/1120/1100 ( the middle card was prevolted at 1225 the 1st and 3rd at 1175 stock which might explain why its needs a high VDDC to remain stable.

What kernel file do you use?  I downloaded the 'optomised' .cl from your earlier post and put it in the kernel folder, but it always seems to use the "ckolivas.cl", if I only leave the optomised .cl file it won't work and putting in "kernel : scrypt130302" into my arguments means sgminer won't work.. so not sure what i'm doing there.

TC 8191 did seem to raise my hash rates up  707K/710kh/s  its the blue bit that i'm taking that from.  My numbers still seem to jump up and down alot though,  does this watcher program help give you an average so you can tell if it really goes up?

WU/s = Work Utility / second. My understanding is that it's the actual usable data that your card is producing. You may be hashing at 740Kh/s but if your WU/s is 600, your card is doing 140Kh of nothing (except adding to the ambient temperature of your room and making your electric bill higher). But that's as much as I think I know (still a little fuzzy). Also I found this (explanation of cgminer interface), which is very helpful: https://doges.org/index.php?topic=5101.0

As far as the kernel goes, I simply renamed my existing kernel file "scrypt130511.cl" to "scrypt130511.cl.backup", and then copied the modified "scrypt130511.cl" file in to the same location as the backup. I didn't specify anything in my arguments, the miner just picks it up. Incidentally, how can you tell which .cl file the miner is using?

CGWatcher just gives you a nicer way to look at your stats, but I prefer to just look in the miner window since it's gives you immediate stats on what it's doing right that second. I primarily use CGWatcher because it can reboot the miner or even your computer if things crash. But it has a ton of other cool features like e-mail updates (which I just discovered yesterday, pretty cool). I notice that my hash rates jump up and down a lot in the first 15 or so minutes that the miner starts, so any time you make a change to your settings give it at least that long before determining if what you've changed helps or not. After it's been running for several hours the average rates should hardly change much at all. If it continues to jump around for a long time it may mean you're getting errors or lots of rejects (so I've heard).

That's as much as I know right now. Feel like I'll never be an expert at this though since there seem to be no end to the variables that can influence performance. Wish I were an engineer, alas I'm just a lay person trying to make a buck.

 

[mezza550]

FYI... required reading in this one. "hashrate isn't everything":
https://litecointalk.org/index.php?topic=2310.45

I did some math and I'm getting the following WU %'s for cards 0-3: 90%, 88%, 86%, 88%. That's 640, 624, 622 & 618 WU/s. Not to shabby, but also very interesting... because my GPU 0 is outperforming my GPU 2, even though GPU 2 has 17Kh/s more than GPU 0.

Also... this http://www.overclock.net/t/1461916/tutorial-ultimate-guide-to-tweaking-amd-cgminer-3-7-2-kalroth-edition-sgminer-instructions-included-aswell-get-the-most-hash-out-of-your-gpu

Time to tweak again.

[FortuneSeeker]

As far as the kernel goes, I simply renamed my existing kernel file "scrypt130511.cl" to "scrypt130511.cl.backup", and then copied the modified "scrypt130511.cl" file in to the same location as the backup. I didn't specify anything in my arguments, the miner just picks it up. Incidentally, how can you tell which .cl file the miner is using?

CGWatcher just gives you a nicer way to look at your stats, but I prefer to just look in the miner window since it's gives you immediate stats on what it's doing right that second. I primarily use CGWatcher because it can reboot the miner or even your computer if things crash. But it has a ton of other cool features like e-mail updates (which I just discovered yesterday, pretty cool). I notice that my hash rates jump up and down a lot in the first 15 or so minutes that the miner starts, so any time you make a change to your settings give it at least that long before determining if what you've changed helps or not. After it's been running for several hours the average rates should hardly change much at all. If it continues to jump around for a long time it may mean you're getting errors or lots of rejects (so I've heard).

That's as much as I know right now. Feel like I'll never be an expert at this though since there seem to be no end to the variables that can influence performance. Wish I were an engineer, alas I'm just a lay person trying to make a buck.

 

Yeah me too. Proving harder than I had hoped too.  The .bin file that you'll find in the sgminer folder has the name of a kernel file at the begining of it. Mine always seems to pick ckolivas.cl.  I had the scrypt130511.cl file in the kernel folder, but it doesn't pick it and if i delete the others it doesn't work and I can't make the kernal argument work either... so far.

What does you .BIN file start with, I wonder what kernel your actually using then?

sgminer has serveral kernel files but i don't know why it picks a particuar kernel

[FortuneSeeker]

Mezza I would also like to know how you used that 'optomized' BIOS file cos atiflash doesn't recognise it when I try.  Maybe because its a .bin file not a .rom?  I followed crytobadger's instructions like when I unvervolted my card and it still won't work

Also thinking about it again I'm not sure you have been using the 'optomised' kernel file... because when I have multiple .cl files int he kernel folder, like you said you did sgminer just picks one for me...I'd be really interested to see whatyou .bin file is once you've been hashing

[FortuneSeeker]

Also Mezza  I tried again using the .cl file and .bin file and it turns out sgminer ignores both and makes a new .bin file using the ckolivas.cl as it shows here

http://prntscr.com/2u1jq4

what bin files are in your miner's folder?

I might try specify the kernel again, though i didn't have a lot of luck last time with making sgminer work at all doing that

This is what I seem to be getting as it is

http://prntscr.com/2u1kb2

What do you think of the khs and WU figures

This is using following

--lookup-gap 2 --thread-concurrency 8192,8192,8192 -g 2 -I 13 -w 256 --auto-fan --temp-cutoff 90,90,90 --temp-overheat 85,85,85 --temp-target 68,68,68 --gpu-memclock 1500,1500,1500 --gpu-engine 1065,1065,1065 --expiry 1 --scan-time 1 --queue 0

I need to play with GPU 0 still,

[radi324]

I've been following this thread for a while, and I'd like to chip in with a problem of mine if you don't mind. I've got 3 VTX3D 280x cards, and I had them running at 700 KH/s each for a few days, on cgminer. I tried mining Darkcoin with sgminer but I switched back to cgminer on other coins after a few hours. Ever since that, I can't get my cards to go beyond 670 KH/s each; the worst thing however is that the WU dropped from 650 to ~500 on each card, and I can't increase it at all. Is it possible that sgminer somehow messed my cards up? Should I just switch back to sgminer? I'm on Windows 7 x64, and this was my config when everything was running perfectly:

-g 2 -w 256 -I 13 --lookup-gap 2 --thread-concurrency 8191 --gpu-engine 1028 --gpu-memclock 1500 --gpu-fan 85

Higher clocks than 1030 result in highly decreased hashrates btw. They're undervolted @ 1.075mV which worked perfectly fine for me. Powered by a Corsair RM1000 PSU, it's an open rig

[wwzoon]

this is my sgminer: https://imageshack.com/i/5hbihap
my r9 280 x dual x shappire: https://imageshack.com/i/0nfzyg (work well!)
second equal card, but with 100 khs less: https://imageshack.com/i/0zpqwag

FLASHED  from 0.41 and 0.40(0.40 work well) to 0.39
undervolt only the card that work bad for try something and now with vdcc 1.175 and engine 896 have only 625khs!

i can't see the dropbox bios optimized from stilt! (((
one can upload bios on mega?

[NameTaken]

Use SGMiner 4.0 instead of 4.1 for the optimized .CL and .BIN files to work.

[wwzoon]

No one can upload the bios of stilt for 280x dualx? I can't see the dropbox link, all are empty, (((

[mezza550]

Some people have PM'd me about the vbios which has apparently vanished from dropbox. Here it is:

https://drive.google.com/file/d/0B8TxUyvOU-ZtVnoxQ0xVWDltMVE/edit?usp=sharing

Included in the zip are 3 files.

• factory_bios.ROM - factory bios for the card when the UEFI switch is not on
• factory_uefi_bios.ROM - factory bios for the card when the UEFI switch IS on (indicated by blue LED on top of the card)
• Sapphire_E24900-O46_AGR.bin - the modified bios.

Use atiflash.exe at the command line (create a usb boot drive to go directly in to DOS, no windows). Personally, I recommend unplugging all of your GPUs except one and flashing the bios like that, one at a time and testing your windows boot up & mining for a few minutes. It's slow but you don't want to get in to a situation where none of your GPUs are working. Factory bios included in case you need to revert.

Some quick atiflash command:

• atiflash -i (information- this will list your GPU(s) and what bios they are using)
• atiflash -ai (advanced information- same as before, but with more info)
• atiflash -f -p # bios_file.bin (this flashes the bios. -f = force overwrite, -p # = specify which GPU by number, bios_file.bin = the bios file (can be .rom or .bin)

Good luck and don't forget to report back here.

[mezza550]

Yeah me too. Proving harder than I had hoped too.  The .bin file that you'll find in the sgminer folder has the name of a kernel file at the begining of it. Mine always seems to pick ckolivas.cl.  I had the scrypt130511.cl file in the kernel folder, but it doesn't pick it and if i delete the others it doesn't work and I can't make the kernal argument work either... so far.

What does you .BIN file start with, I wonder what kernel your actually using then?

sgminer has serveral kernel files but i don't know why it picks a particular kernel

Sorry I've been absent here for the last few days. Life always getting in the way! So I took a look in my sgminer folder, and the .BIN file that my miner created is: "scrypt130511Tahitiglg2tc8191w256l4.bin". So it looks like it's picking up the right kernel by itself. I'm not specifying anything for that in my arguments. Maybe you could try making a copy of your mining directory and delete all the .cl files in that one except scrypt130511.cl? Or have you found a workaround in the last few days?

[mezza550]

Mezza I would also like to know how you used that 'optomized' BIOS file cos atiflash doesn't recognise it when I try.  Maybe because its a .bin file not a .rom?  I followed crytobadger's instructions like when I unvervolted my card and it still won't work

Did you use atiwinflash (in windows)? Or atiflash at a DOS command prompt (after booting in to dos only)? The .bin / .rom difference shouldn't be an issue as far as I know. Also this bios flashing thing is independent of any undervolting as far as I know.

[wwzoon]

thx for bios, but the card don't change, all time with 615 khs with only 896 engine i don't understand! (
edit: i dont know how, but now work well the card, and the second card have 780Khs XD ok consuming grow up, but now i have only 2 cards then i don't care )

[mezza550]

thx for bios, but the card don't change, all time with 615 khs with only 896 engine i don't understand! (
edit: i dont know how, but now work well the card, and the second card have 780Khs XD ok consuming grow up, but now i have only 2 cards then i don't care )

Just to clarify, your card is now performing at 780Kh? Settings please!

[crazyates]

thx for bios, but the card don't change, all time with 615 khs with only 896 engine i don't understand! (
edit: i dont know how, but now work well the card, and the second card have 780Khs XD ok consuming grow up, but now i have only 2 cards then i don't care )

Just to clarify, your card is now performing at 780Kh? Settings please!

Your card won't hit 780 with settings only. His card probably has Hynix memory, which allows you to OC higher. I have a Hynix 280x that reaches 805kh/s! The rest of the Hynix ones hit 760-775 pretty easily, and the ones with Elpida RAM is pretty much limited to ~730-740kh/s, regardless of settings used.

[wwzoon]

no no i have elpidia XD and have 785khs with engine 1125 and memory 1750, the hinix don't work so fun, have 78° with 725khs, over vdcc i think

[FortuneSeeker]

Use SGMiner 4.0 instead of 4.1 for the optimized .CL and .BIN files to work.

Any ideas where I can get a compiled version of sgminer 4.0 to save me trying to compile it myself

[mezza550]

no no i have elpidia XD and have 785khs with engine 1125 and memory 1750, the hinix don't work so fun, have 78° with 725khs, over vdcc i think

Would you mind sharing all of your settings (copy / paste arguments) please? Also you mentioned about voltage, are you using Trixx, or something else? And you're using the same bios I uploaded?

thanks!

[mezza550]

Any ideas where I can get a compiled version of sgminer 4.0 to save me trying to compile it myself

Here's where I grabbed mine from: https://mega.co.nz/#!scgiiaaT!VvxjpA6KsURx2oMOm2t1GVvV9epWwC3nVncFPsUiZYw

thread: http://www.reddit.com/r/litecoinmining/comments/1va8g2/ann_sgminer_400_release/

[wwzoon]

i was modificed the bios, but now i have yours bios.
This is my config:
setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1
-o stratum+tcp://scrypt.megamultipool.com:80 --thread-concurrency 8191,8191 --worksize 256 --intensity 13 --gpu-threads 2,2 --shaders 2048,2048 --temp-target 65 --auto-fan --gpu-fan 35-90 --temp-cutoff 80 --temp-overheat 76 --lookup-gap 2 --gpu-engine 1040,1125 --gpu-memclock 1500,1750 --gpu-powertune -20,5
first is the card that don't work fine, jinix
second is my best card not jinix
all same card: 280X DUAL X, the second is bf4 edition!

[FortuneSeeker]

Any had it when they are changing settings on the cards and the card starts doing 300kh/s and no matter what you change it too after it doesn't change from that .

EDIT:

OK i think thats because when sgminer crashes or the drive fails i hadn't restarted the computer each time.

Next question can you use TRIXX to change the gpu clock while sgminer is working, or do you need to restart sgminer to see if what you've changed makes a difference

[mezza550]

Next question can you use TRIXX to change the gpu clock while sgminer is working, or do you need to restart sgminer to see if what you've changed makes a difference

I'd also like to know more about this- and about Trixx in general with these cards. I did one test last week where I lowered the voltage to 1150 and my computer locked up pretty quick. Has anyone here successfully lowered the voltage with their 11221-00-20G? Is trixx the best way to do this, or using the vddc argument in sgminer? Or within sgminer while it's running?

Quick generic update, my rig is still operating at about the same level ~700-710

[FortuneSeeker]

Lucky you lol mine is all over the place right now, can't seem to break 690

I used cryptobadgers undervolting guide and mine currently run at 1100/1120/1100 fairly stable i think

http://www.cryptobadger.com/2013/10/undervolting-in-linux-via-modified-bios/ <---- link to guide

I'm going to do some more structured testing over the next few days. I'd be happy with 710 at this point

[Amph]

here my impressive result, notice the lucky vcore of the 280x, the other is an old 7950

[CtrlAltDefeated]

I get 750kh on both my windforce 280x using sgminer 4.1. I get even higher than that on my ubuntu install (775ish khash)

setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1
sgminer.exe -o stratum+tcp://localhost:3333 -u User.Worker -p password -I 13 -g 2 -w 256 --thread-concurrency 8192 --kernel alexkarnew --gpu-engine 1080


and yes you can use trixx while mining.

[Kanalj]

Good luck and don't forget to report back here.

Thanks for the upload mezza550, I've followed the exact same procedure as you've stated here and can report very similar results for my 3x 11221-00-20G's -they hover around 700-707kh/s. My setup is pretty much the Cryptobadger rig: http://www.cryptobadger.com/2013/04/build-a-litecoin-mining-rig-hardware/

Now I'm wondering if I can get a few more khash out of them, It would be nice to end up somewhere around 740. What I'm going to try in order of importance:

1. Fine tuning the overclock.
Right now they are all on --gpu-engine 1065 --gpu-memclock 1500, probably can adjust the sweet spot further for individual cards.
Q: No performance gain by overclocking memory on 280X?

2. Going from cgminer to sgminer and try out a few other kernels.

3. Look at other Catalyst/SDK version combinations.
Right now I'm at Catalyst 13.11 beta 9/APP ADK 2.7.

4. BAMT
I tried ubuntu, went half insane trying to do the simples things in a broken UI, went back to windows. A pre-configured mining-specific Linux enviroment like BAMT should be better optimized and thus give slightly higher hashrate. Problem with support for Wi-Fi cards though.

5. Pray
The patron saint of miners is Saint Barbara, she might bless me with a few extra khashes
http://en.wikipedia.org/wiki/Saint_Barbara

[mezza550]

Thanks for the upload mezza550, I've followed the exact same procedure as you've stated here...

Very cool, will look forward to hearing about your experiments. Quick update for me:

- I disabled "Cool and Quiet" under for my CPU in the bios, as suggested by a user on this thread: https://litecointalk.org/index.php?topic=14951.new;topicseen#new, but it didn't really change performance.
- I switched to a different mining pool, Shiftcoin for a day and my performance was somewhat dramatically better, at least in terms of hashrate. All of my cards enjoyed a 10+ Kh jump, was getting 715,720,740,710!

So it seems that the type of coin you are mining and/or pool you are participating in can also sway these results. When you guys are testing, do you mine just one coin, or?

[Kanalj]

I've switched to SGminer 4.1 and I wont be going back to CGminer.

Right now I am trying out all the supplied kernels in SGminer, a 48hour test on each one. When I started mining the only thing I was looking at was hashrate but after some reading I realised it's WU that's the most important factor here (Work Utility). Some kernels gives much better results that others but right now I only have 48h results for two of them:

zuikkis @ 1065 Mhz
GPU 0: 722kh/WU:649 (89.8%)
GPU 1: 722kh/WU:647 (89.6%)
GPU 2: 701kh/WU:644 (91.8%)

psw @ 1065 Mhz
GPU 0: 728kh/WU:665 (91.3%)
GPU 1: 724kh/WU:675 (93.2%)
GPU 2: 714kh/WU:665 (93.1%)

The WU should be 90% of the hashrate or higher. More results in a few days.

[marexim]

I have some 280X Dual-X OC (11221-00-20G) card. I have a very high temp more then 88-90C. Have you any solution? Thanks.