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I've been playing with these cards for quite a while, tracking every change in config and it's affect and I think I've found the perfect CGMiner settings.


These settings get me 480 khash/s

So here are my settings, cards are running at low temps, reject rate is low and like I said 480 khash/s per card.

For under $200 a card, I'm quite pleased.

"api-listen" : true,
"intensity" : "19",
"vectors" : "1",
"worksize" : "256",
"kernel" : "scrypt",
"auto-fan" : true,
"temp-cutoff" : "85",
"temp-overheat" : "75",
"temp-target" : "70",
"expiry" : "10",
"gpu-dyninterval" : "7",
"log" : "5",
"queue" : "0",
"retry-pause" : "5",
"scan-time" : "5",
"scrypt" : true,
"temp-hysteresis" : "3",
"shares" : "0",
"shaders" : "1792",
"thread-concurrency" : "16000",
"gpu-thread" : "1",
"gpu-engine" : "1125",
"sharethreads" : "32",
"lookup-gap" : "2",
"gpu-powertune" : "20",
"gpu-memclock" : "1500"

I hope this helps someone, cheers!

hmm..

i have the asus variant and it only has 1280 shaders and if i put the memclock over 1450 the system locks up.

very strange.

Im also using the asus 270oc, what settings are you using at what speeds/temps?

my box is currently in the living in a case while i test it so temps are a little high.

i undervolted the bios to 1.1v and i use the setting below.

"xintensity" : "4",
"gpu-threads" : "2",
"worksize" : "256",
"gpu-engine" : "1060",
"thread-concurrency" : "5121",
"gpu-fan" : "0-90",
"gpu-memclock" : "1250",
"gpu-powertune" : "20",
"temp-cutoff" : "90",
"temp-overheat" : "80",
"temp-target" : "75",
"auto-fan" : true,
"gpu-dyninterval" : "7",
"gpu-platform" : "0",
"monitor" : "cat >> /home/cgminer.log",
"kernel" : "alexkarnew",
"kernel-path" : "/opt/miners/sgminer/kernel"

https://i.imgur.com/hGVIrE2.jpg

credit goes to http://www.reddit.com/r/litecoinmining/comments/1wc5th/bounty_undervolting_gigabyte_r9_270_bios/cf0y97g (http://www.reddit.com/r/litecoinmining/comments/1wc5th/bounty_undervolting_gigabyte_r9_270_bios/cf0y97g) for the idea.. i just weaked it a litle for my own use.

How much power does undervolting save? I'm running the cards harder, is that a risk?

Still going strong at 480 though.

https://i.imgur.com/c0ew4ke.jpg

i haven't managed to get a Power meter onto my rig yet, i'm waiting for the Belkin Wemo insight to be launched so i can do it remotely.. my rig is in my loft so its not very easy to get up and mess with or check the wattage.

I've never been able to get my machine up that high. every time i put the Memclock over 1400 it hangs on me. i thought it might have been because i was using Linux but you're using the same cards and OS as me, so who knows..

also, for the addition of £70 a year to my total, id rather have my cards last that little bit longer.  ;)

Does anyone know offhand how much juice these pull (W) when hashing? Be nice to make a card comparison chart or something. Really hard to find the info. >:(

Think I found it there on amazon somewhere. Thanks man!!! :-* #nohomo

shaders are not used if you have thread concurrency, so you can safely omit that line.

The 270x settings I posted here may perform just as well on the 270. Donno, give it a crack.

http://forums.overclockers.co.uk/showpost.php?p=25916656&postcount=55

Gigabyte 270 ( Non-x) 490Kh under Windows 8 with Sgminer 4.0.0

-w 256 -I 19 -g 1 --thread-concurrency 21568 --gpu-fan 80 --gpu-engine 1150 --gpu-memclock 1500 --lookup-gap 2

Thanks, I am also at 490 now using those intensity and gpu values, will run for a while and see if it's stable and what the temps are but you might have a winner there.

500 Kh/s  with sgminer 4.1.0


"xintensity" : "4",
"kernel" : "zuikkis",
"thread-concurrency" : "8193",
"gpu-threads" : "2",
"gpu-engine" : "1160",
"gpu-memclock" : "1500",

Someone tried gpu engine 1170... But stability is important.

Is this all you have in your config? It only gave me 360 kh.

I'm also curious.

{
"pools" : [
   {
      "url" : "stratum+tcp://stratum.coinex.pw:9024",
      "user" : "Wipeout2097.1",
      "pass" : "x"
   }
]
,
"xintensity" : "4",
"worksize" : "256",
"kernel" : "zuikkis",
"lookup-gap" : "2",
"thread-concurrency" : "8193",
"shaders" : "1280",
"gpu-engine" : "1160",
"gpu-fan" : "80-100",
"gpu-memclock" : "1500",
"gpu-memdiff" : "0",
"gpu-powertune" : "20",
"gpu-vddc" : "1.05",
"gpu-threads": "2",
"temp-cutoff" : "72",
"temp-overheat" : "69",
"temp-target" : "66",
"api-listen" : true,
"api-mcast-port" : "4028",
"api-port" : "4028",
"auto-fan" : true,
"expiry" : "15",
"gpu-dyninterval" : "10",
"gpu-platform" : "0",
"log" : "5",
"no-pool-disable" : true,
"queue" : "0",
"scan-time" : "15",
"tcp-keepalive" : "60",
"temp-hysteresis" : "3",
"shares" : "0",
"kernel-path" : "/usr/local/bin",
"api-allow" : "W:127.0.0.1,W:192.168.1.100"
}

I found this to be unstable, reverted back to OP settings.

Thanks. I'll give it a try.

https://i.imgur.com/tYMa5lB.png

Running for about 5 to 6 hours already.

Although I'm using a Sapphire 270X, not a Gigabyte 270.

these settings are great.  doesn't strain the card & I can't run at 1500 mem w/o it crashing every once in a while anyway.

I changed it to 1080-1200 and they are running at 475khash

(and even if I could run it at 1120-1500 or whatever, the power savings from being able to drop voltage a bit is probably worth it)

Gigabyte R9 270 OC - Stable 480kh/s with <1% of rejects - cgminer

"api-listen" : true,
"intensity" : "19",
"vectors" : "1",
"worksize" : "256",
"kernel" : "scrypt",
"auto-fan" : true,
"temp-cutoff" : "85",
"temp-overheat" : "75",
"temp-target" : "70",
"lookup-gap" : "2",
"gpu-fan" : "60",
"expiry" : "30",
"gpu-dyninterval" : "7",
"log" : "5",
"queue" : "1",
"retry-pause" : "5",
"scan-time" : "30",
"scrypt" : true,
"temp-hysteresis" : "3",
"shares" : "0",
"thread-concurrency" : "21568",
"gpu-thread" : "1",
"gpu-engine" : "1125",
"sharethreads" : "32",
"gpu-memclock" : "1470",
"no-submit-stale" : true


On higher clocks one of my cards is sick so lower are more stable for me.

has anyone beenable to get 500kh/s and above ?
cus right now i am at 505kh/s stable

here is my settings and a pic

this setting will do 505kh/s on the core and mem
core clock 1160
mem clock 1500
these clock speeds will get you to 505kh/s to 510kh/s
core 1175
meme 1500

cgminer version 3.7.3
config file info this is on one of my R9 270X

"xintensity" : "4",
"worksize" : "256",
"lookup-gap" : "2",
"thread-concurrency" : "8193",
"temp-cutoff" : "80",
"expiry" : "1",
"failover-only" : true,
"log" : "5",
"queue" : "0",
"scan-time" : "1",
"device" : "1",
"gpu-threads" : "2"

http://s9.postimg.org/dxz38xvqn/r9270x.png

I can get as high as 1175 engine, but I have to keep temps below 70C. See my pic above, same as yours, about 505 kh/s.

to keep your temps low you should look at either the way the airflow is in your case and if you can not improve that i would suggest using a inclosed liquid cooling system to achieve lower temps ill post a pic of the inside of my case later for you to see
 

I have a 270 (non - x) and I tried wipeout's config and got around 500khs.
I have one gigabyte card and two msi 270's.
Now that I got the gigabyte maxed out I need to try and do the same with the MSI cards.

3x Gigabyte R9 270 GV-R927OC-2GD
VRM chip: IR3567A - Elpida DIMMs
ATi 14.4 beta drivers

Cgminer 3.7.2 + Kalroth fixes (3.7.3 is what people call this I guess) or SGminer 4.1
Xubuntu linux 13.10

"xintensity" : "4",
"failover-only" : true,
"worksize" : "256",
"scrypt" : true,
"auto-fan" : true,
"gpu-fan" : "30-84,30-84,30-84",
"temp-cutoff" : "85",
"temp-overheat" : "80",
"temp-target" : "70",
"expiry" : "1",
"log" : "5",
"queue" : "0",
"shares" : "0",
"thread-concurrency" : "8193",
"gpu-threads" : "2",
"lookup-gap" : "2",
"gpu-engine" : "1060"
"gpu-memclock" : "1250",
"gpu-powertune" : "5",
"scan-time" : "1",
"kernel" : "scrypt", (or alexkarnew in sgminer)
"kernel-path" : "/usr/local/bin"
}

Modded bios voltage is now 1.19 perf + 1025 boost
Temps are ~60C in the midwest in April

KH/S: ~450
WUE: ~94%

<1% Rejects

total system power draw ~430w

You may need to play with thread-concurrancy (either 5121 8193 or 10241) to get the WU/WUE above 89%.

I'm using sgminer 4.1.153 with these settings and I'm over 500 khs. WU is just over 450.  Rejects less than 1%.

"api-allow" : "W:127.0.0.1",
"api-listen" : true,
"api-port" : "4028",
"expiry" : "120",
"hotplug" : "5",
"kernel-path" : "/usr/local/bin",
"kernel" : "zuikkis",
"log" : "5",
"queue" : "1",
"scan-time" : "60",
"scrypt" : true,
"shares" : "0",
"gpu-threads" : "2",
"gpu-dyninterval" : "7",
"gpu-engine" : "1160",
"gpu-fan" : "80-80",
"gpu-memclock" : "1498",
"gpu-powertune" : "20",
"temp-target" : "68",
"temp-overheat" : "87",
"temp-cutoff" : "95",
"temp-hysteresis" : "3",
"vectors" : "1",
"worksize" : "256",
"lookup-gap" : "2",
"thread-concurrency" : "5121",
"xintensity" : "4",
"no-pool-disable" : true

I'm finding a hard time getting above 1060 stable. Is this to be expected?
Under 13.3 Beta on ubuntu 14.04. With an Asus R9 270 I get up to ~460 KH/s and even this seams to be only stable for a day.

Hi everyone,

I just setup a R9 270 on my computer but, since, when I launch cgminer 3.7.2 for scrypting altcoins (like LTC) I'm stuck @ 15Kh/s... I don't find what ?!

post your .bat and .conf file so we can help

good stuff.i can use these settings.

ty guys

I'm running a Sapphire R9 270X Toxic - had been running with gpu threads = 1 and thread concurrency 21536, but I see much better speeds with -g 2 and -threads 8193

Suspect it may be something to do with having 4GB RAM and I'm suspicious that its not 100% reliable which isnt helping my fine tuning, but someone may know better

I'm running 4 x GB R9 270x over two machines as I like to try different settings on each to see which is stable and so far BAMT 1.6 appears to be the one for me. Tried 1.6.2 but kept crashing. Currently getting 489KH/s per card with the following settings. Can't profess to know what all the settings mean but I have tinkered with intensity, worksize and tc. Should be moving to an open air rig shortly to get all 4 on the same setup.


"api-listen" : true,
"api-port" : "4028",
"api-mcast-port" : "4028",
"intensity" : "19",
"vectors" : "1",
"worksize" : "256",
"kernel" : "scrypt",
"auto-fan" : true,
"temp-cutoff" : "85",
"temp-overheat" : "75",
"temp-target" : "70",
"expiry" : "10",
"gpu-dyninterval" : "7",
"log" : "5",
"queue" : "0",
"retry-pause" : "5",
"scan-time" : "5",
"scrypt" : true,
"temp-hysteresis" : "3",
"shares" : "0",
"shaders" : "1792",
"thread-concurrency" : "21568",
"gpu-thread" : "1",
"gpu-engine" : "1150",
"sharethreads" : "32",
"lookup-gap" : "2",
"gpu-powertune" : "20",
"gpu-memclock" : "1500",
"kernel-path" : "/usr/local/bin"

You should be able to get over 500 khs with the 270x. I'm close to 525 with my non-x. I don't know if the settings between the x and non-x work the same or not, but you can view my settings above.

Old thread but your "shaders" : "1792", should be "shaders" : "1280",

What are you guys running for X15? I'm only getting 5.46 on 4 GV-R927OC-2GD's ATM

Settings:
"gpu-threads" : "2",
"gpu-engine" : "1131",
"lookup-gap" : "2",
"gpu-memclock" : "1200",
"thread-concurrency" : "13188",
"rawintensity" : "98304",