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Alright I am trying so many different combinations of settings for the 7950 in CGMiner from this site here
https://github.com/litecoin-project/litecoin/wiki/Mining-hardware-comparison#wiki-ATI_AMD_GPUs

I already did the MAX_ALLOC_PERCENT 100 thing in just a normal CMD (btw I am on Windows)
but first off, I cant have a thread concurrency of over 11,000, I get the disabling gpu/thread kernel error, even though it says 22400 when I do the auto tune type test for it. So Idk the problem there.

Tells me Memory click of 1600 is outta the safe zone, I got it to over 600 at one point but the thing got to 95 damn degrees, even on Intensity 16, I got it up to like 78-80 degrees. Can you guys help me figure out why it's getting so damn hot, btw when it does or I change some of these settings, the card just locks up and I have to reboot. So really would like answers/settings, it's the Gigabyte 3 fan 7950, using latest CGminer, my .bat I just keep switching around. Getting annoyed

25 LTC reward to whoever gives me the best solutions (if its a tie I'll split it up accordingly)

EDIT: Also, when I change the memory inside of CGMiner when it's running, the display I have hooked up to it goes black and my mouse freezes on the display thats hooked up to my Nvidia card
EDIT: Like right now, I have it working. If I just leave the stock clock and mem at 1000/1250 and 10600 threads at an intensity of 18, I get almost 600K/hash but the temp is 84C, like this is ridiculous.

try the AMD GPU on its own, with NO nVidia in the mix.

Like what do you mean? Like take the card out? Cause the Nvidia card isn't being used by CGMiner, the plan is to later use CUDAMiner on that one (which I've confirmed is working well) but the 7950, first of all I couldnt even get it to show up in CGMiner until I plugged a display into it, now every time I change the Memclock in CGMiner it crashes I guess you'd say, and Idk why it gets hot so quick and easily. Plus the thread issue, I should be doing over 20k and I can only allow 10k. Ugh.

Also in my pool stats it says my card is only getting 46 k'hash

Ummmmm weird problem I just tested now too. When I launched CUDAMiner to work on the GTX 570, it like turned off CGMiner or something, the hash rate is like 62/khash now on the card and I can hear the fans stopped spinning as fast and the temp is 60 now. What's the problem? I thought you could run these separately at the same time.

Here's what I have for my cgminer config:

-I 20 -w 256 -g 1 --lookup-gap 2 --thread-concurrency 21712

core at 1025/ mem at 1500 but I have an airconditioner blowing on it and stays in the 60's - close to 600k
at mem 1400 between 550-580k and the 60's

you can drop downto -I 18 or -I 16

is it in a case with it closed?

I just got 3x7950 (i had 2x7970), and i was having a hard time tunning them up, however now im getting 570-580 no problems.

I couldn't boost thread-concurrency so i had to stick wtih 8192... if i got more than -i 13 the temp spikes a lot. The rig is in my garage where it's 80F inside, so i had to buy a fan from walmart 9" so it blows all the heat out. here are my settings:

http://gyazo.com/e5506703d9277605a78737c33e3e2344.png

hope that helps

note, i could probably get to 600 but the temp would be 78-80 something like that

Did you do the overclocking/memory clocking just in CGminer or did you use an actual program, cause anytime I raise my memory clock in CGminer and hit okay and run it, my screen dies and it all locks up.

These are the things I would try:
1. Verify that the MAX_ALLOC_PERCENT 100 is in your user environmental variables window.  >Control panel>Search "Var">"edit the system environmental variables">Evironmental Variables>User variables for USERNAME.  If the variable isn't listed here, then click new and input the variable name and value.
2. Use Cgminer 3.1.0
3. Go to cgminer folder and delete all scrypt.bin files listed. (Before you run cgminer!)
4. Edit your .bat file with no overclock settings.  --scrypt --thread-concurrency 8192 -g2 --auto-fan --auto-gpu --intensity 13 --worksize 256
5. Run cgminer with the new settings.
6. Run Afterburner (download & install if you haven't already).
6a. Edit Afterburner.cfg add these settings:
UnofficialOverclockingEULA   = I confirm that I am aware of unofficial overclocking limitations and fully understand that MSI will not provide me any support on it
UnofficialOverclockingMode   = 1
UnofficialOverclockingDrvReset   = 1
7. In afterburner, goto settings and check the following: "Unlock voltage control", "Unlock voltage monitoring", "Force constant voltage", hit OK, restart Afterburner.
8. Open afterburner.  Check to see if you have a voltage number listed.  If you do not, then your voltage is most likely locked.
9. Adjust Memory clock to 1550 - 1600 (no more (yet)), adjust Core clock to 1050-1100.
10.  After each adjustment, monitor cgminer hash rate for a minute or two.  This should net you 550 - 600 Kh/s.
11.  If your voltage is unlocked, then slowly lower your core voltage downwards by increments of 10.  Let it run for a minute to check for stability.  Then lower again, until you lose stability.  You'll probably have to reboot a time or two.  Find where it locks up, and increase the voltage back up by 5-10 until system is stable.  Lowering voltage should reduce your temps by 5-10C

Always make sure, that every time you make a change to cgminer's settings, to delete the scrypt.bin file it created.  Always!  Hope this helps.

M

--Edit/add  Once you find a stable overclock and voltage using Afterburner.  Place those settings into your cgminer .bat file and remove the "auto gpu".  Also, if your gpu is throttling (fast/slow), then try adjusting your power limit to 5%, higher if needed.

Try this in cgminer --intensity 13 --gpu-threads 2 --worksize 256 --vectors 2 (or 1 just test it) --shaders 1792 --thread-concurrency 8100 or 8092 or 12192 and overclock at 1135Mhz core and 1495Mhz mem. I get ~600Kh/s .
Try drivers 13.5 Beta and APP SDK 2.7 .

edit: i have sapphire 7950 vapor-x

Are you using a Gigabyte 7950? If you are, I recommend that you make sure you flash the card down to the F43 bios. Additionally, try this config in a .bat file -- it seems to work with a lot of folks having the same issue as you. Hopefully it'll get you at the very least, stable. Let me know how it works out, good luck!

I heard of having to do the flash F43, doesn't that unlock the voltage ability or undervolt it? What exactly does it do. I will try this later, is there anyway to flash the Bios with that without having to put it on a USB thumb drive, anyway to do it on like a 500gb external HDD?

I flash my 2 x Gigabyte 7950 card from FX1 bios to f43 bios.
Temps are 10 degrees and 50W per card lower..
Bios undervolt core from 1.25v. to 1.150v.
Now i can mining 1200-1240kh/s (from 1100-1150) with same temperature.

do you have 2x6pin or 1x8pin+1x6pin pcie card? thanks!

Regarding the MAX_ALLOC_PERCENT environment variable:

This setting is CASE SENSITIVE! I got stuck on this for a while. Go to your Environment Variables Settings panel:
Click the Start Button
In the search box type "var" without quotes.
Choose the "Edit the system environmental variables" option.
Click on [Environment Variables...]


Verify that MAX_ALLOC_PERCENT is present in ALL CAPS with a value of 100.

This will allow you to increase the thread-concurrency.

I have 2x6pin cards.
This is post for Gigabyte WF3 7950  help me https://forum.litecoin.net/index.php/topic,2641.0.html (https://forum.litecoin.net/index.php/topic,2641.0.html)

nice! thats definitly working. I tought the new ones (1x8pin+1x6pin) are hardlocked.

DO NOT attempt to flash if you're unfamiliar with the process. You can easily brick your card. The new revision Gigabyte cards are trash, absolute garbage, the voltage is set far too high. So you should either flash (again not recommended if you're new to the process) or you should send it back/sell it and get a different brand. That would be the easiest solution.

My was locked at 1.25v.
I flash from FX1 bios to f43 bios.
Now locked at 1.1v. :)

You can use ATI Winflash. It's basically idiot proof - just make sure to backup the old BIOs incase anything happens. Additionally, the Gigabytes have 2 switches on the card to revert back if anything happens, worst case scenario. If you want a tutorial PM me I'll send you one or hit me up on #freenode :)

F43 does not unlock, it just locks the load voltage to 1.09V instead of 1.25V.

But 1.09V is much more reasonable than 1.25V for mining.

Pretty sure my card is voltage locked, cause It's the newer 3 fan one with a 8 pin and a 6 pin, I don't know what this means. Sure would love to know how to back up my Bios and then flash them so I could get my card running cooler. It's around 85c on average giving me 605 K/hash, also like I said anyone know whats up with the memory clock problem? If I change it in CGMiner or even Catalyst, it makes my monitor go black then locks up. Really would love to get the most hash out of this card and I know I need to tweek this if I want that. Thanks everyone.

Also. BONUS POINTS! Whoever can help me get CUDAminer running at the same time as CGminer, so I can mine with my GTX 570 as well, when I launch CUDAminer, while CGminer is already mining my 7950, it's like it steals away from CGminer, my card gets cooler, the hash rate drops to like 40 k/hash, it's like CUDA takes priority or something. Really need this one resolved! Thanks guys

Don't use CGminer to control your GPU, it's not built for that. You're card is heating up because your ambient is probably high and your fan control speed is either low, or the program that is telling you how fast the fan is spinning is lying to you, it happens to me. Can you hear the fans on this card only spinning when you're at 60%+? You should if the fans are really going that fast. I use a combination of MSI after burner and trixx to control my fans, it's a pain but worth it.

How much system RAM do you have and how much VRAM total do you have? I'm told this ratio plays a huge role in hte thread concurrencies you are able to run which impacts your hash rate.

I bet your CUDAminer program is not using hte nvidia card, it sounds like its using hte ati. When I had a mixed system I needed to run two instances of CGminer, one for ati and one for nvidia. I had to add this flag for nvidia - "--gpu-platform 1". I would assume your CUDAminer config is wrong / missing a key flag?

Fans are at 100% cauase I use several programs and they all show it and I can hear it lol they are on MAX.

Idk really how to change the CUDAMiner config to specify a card, if anyone knows please let me know.
Also my card has 3 gigs of RAM while my rig has a 2 gig stick in it.

Put BIOS Switch on the GPU to number 1
You can backup VGA BIOS with GPU-Z
http://i914.photobucket.com/albums/ac348/civato/GPU%20NVIDIA%20BIOS/GPUBIOS1.png

Now you have original bios,and you can flash it back if something gone wrong

Wow, that's really hot.. Take a picture of your card / case / set up. What is the ambient temperature? In the 80s? Can you set thread concurrency in the twenty thousand range or are you limited to 8192?

Logicus, can you also show me how I go about flashing to the new bios for my card that I wish to use. I don't have a USB thumb drive laying around :\

Also no, my thread count is 10k, I cant even go above 16k for whatever known reason, I did the MAX ALLOC PERCENT 100 thing, still just this. Plus the memory clock issues, not letting me change it.

You need DOS bootable drive.With usb is easy way.Also you may use floppy :).

1. Download F43 Bios: http://www.gigabyte.com/products/product-page.aspx?pid=4121&dl=1#bios
2. Download atiflash: http://www.techpowerup.com/downloads/2230/ATIFlash%204.07.html
3.1 You need DOS bootable USB drive. I used this tutorial: http://www.sevenforums.com/tutorials/46707-ms-dos-bootable-flash-drive-create.html
3.2 If use floppy - format  with option "Create an MS-DOS startup disk"
4. put F43 Bios and ati flash to USB drive/floppy disk
5. Turn off the computer
6. Put BIOS Switch on the GPU to number 1 http://www.jagatreview.com/wp-content/uploads/2012/02/gigabyte-amd-hd-7950-dualbios-switch.jpg
    If anything goes wrong you can just put switch back to number 2 and you have factory default BIOS.
7. Boot DOS from usb/floppy
8. Flash to F43 BIOS version:

 atiflash -p 0 xxxxxx.F43

9. Reboot

P.S.
Under Win XP you can download files in one folder(F43 Bios atiflash),open start button,type "command" in run - it will start dos :).Now go to folder and  Flash to F43 BIOS version:
atiflash -p 0 xxxxxx.F43

use ATI Winflash for Windows.

yep, I'm running all my 7950 at 1.09V too now.

Tutorial how to flash the bios of your ati cards for Windows  http://www.overclock.net/t/1353325/tutorial-atiwinflash-how-to-flash-the-bios-of-your-ati-cards (http://www.overclock.net/t/1353325/tutorial-atiwinflash-how-to-flash-the-bios-of-your-ati-cards)

My Gigabyte 7950 is the three fan one with I believe a locked voltage, will flashing the bios still help? No one told me how important System RAM was, I couldnt get thread concurrency over 10k with 2gigs, put a 4gig stick in and I am at 21712 and now I get no HW errors which is great. But card still runs at 84 degrees to pull around 600 K/hash, probably cause of the voltage and I still cannot change the memclock without the card crashing, maybe I have to overclock it in MSI, catalyst worked I think but when I put those same overclock settings (and even without) in CGminer, soon as I launched it the card froze up and I had to reboot.

You're better off using the ATI control panel or another tool such as Sapphire TRIXX or MSI Afterburner IMO.  Try setting the Core to 1100 MHz and Mem to 1500MHz, and set the powertune to 20%.  Set thread concurrency to 23777 or 22111.  Also set Intensity to 20.

Well right now my intensity is 19 and my thread concurrency is 21712, Intensity isnt 20 cause the card pushes 90 degrees if I go that route, righyt now its 86 at 19. I used AMD catalyst to change the engine and clock settings, thats the problem, maybe MSI Afterburner will work better. Or maybe I have to do this bios flashing thing first to help resolve these issues.

I'm thinking there might be an issue with the cooler on the card.  What temps do you get at Intensity 20 for stock clocks?

Well since it has to run on stock clocks, at 20 it will get to 93-95, I can hear and see the fans running. But the voltage is stock to at 1.225 I believe.

Also problem if you anyone can help me, sometimes letting it run all night, I wake up and I noticed my screens have frozen ( only assume the card has crashed) but the PC doesnt shut down, is there a way to set it so my PC resets or CGminer resets when this happens (which doesnt really help cause if the card is crashing, I cant see it opening CGminer again) any help in this field helps a lot

Those temps sound insanely high for stock.  The only thing I can recommend beyond getting a replacement card is to get some high quality thermal paste and replace the crap that is currently on it.

No one told us how many System RAM you have  ;D
here is some info https://bitcointalk.org/index.php?topic=117221.msg1256502#msg1256502
"The memory requirements for 7xxx cards are also higher because of larger thread_concurrency values, for instance a thread_concurrency of 24000 means 1.5GB system RAM per card is required"
"Set thread_concurrency to somewhere slightly below 64 * bus_width_of_card_in_bits.  So, for a 7950, that would be 64 * 384 = 24576; ideal values are 21712 or 24000"

Are you flash you cards?

OP, are you backing out of the reward? :P

I would almost guarantee this will solve your problem, a thread i wrote yesterday: https://bitcointalk.org/index.php?topic=200777.0

If it works don't worry about the reward though cause i'm not the first to suggest this :)

I bild new PC with 1xGigabyte 7950 GV-R795WF3-3GD
The new card is 1x6 + 1x8 pin power
1.25V 1000/1250
I install win 7 x64,MB drivers and latest drivers from amd.com
Download and install Trixx.
Flash VGA bios from FX1 to F43 with winflash http://www.overclock.net/t/1353325/tutorial-atiwinflash-how-to-flash-the-bios-of-your-ati-cards (http://www.overclock.net/t/1353325/tutorial-atiwinflash-how-to-flash-the-bios-of-your-ati-cards)

I make 2 bat files
start1.bat:
setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1

and
start2.bat:
timeout 25
color 07
cgminer --scrypt -o stratum+tcp://stratum.give-me-ltc.com:3333 -u user.1 -p 1 --shaders 1792 --thread-concurrency 10240 -I 13 -g 2 -w 256

I put two files in cgminer's folder,make 2 shortcuts and put then in windows Startup

I open Trixx and set 1140 core and 1420 memory.Save in profil 1.
Set custom fan profill  70% 70 C,100% 80C.
Set Trix start with Windows.
I restart pc and after 40s vga start mining LTC with 608Kh/s.

P.S.
with "--thread-concurrency" over 11000 cgminer wont start.
Power "on the wall"  is 295W at 1.09 70%fan  70C  and  330W at 1.25 80%fan  73C

PC
MB G33/RAM 2GB/CPU C2D 5300/HDD 500GB 2,5"/7950 GV-R795WF3-3GD/Corsair TX650W

My MSI and Sapphire 7950's run well at the following clock/voltage combos, depending on the heat in the house.

950v/950mhz
975v/1025mhz
1000v/1050mhz

cgminer gets me about 500khash each (config #1 below) in a closed case system at the lower settings with ~70C/75C, and 1100khash at the higher settings (also config #1 below), depending on the room temp. A single card can reach much higher khash with lower temps, but you should try these voltage/core clocks. Memory is 1500mhz @ 1.6v.

This cgminer config leaves the system more usable:
"intensity" : "13,13",
"kernel" : "scrypt",
"gpu-threads" : "2",
"thread-concurrency" : "8192,8192",
"lookup-gap" : "2,2",
"scrypt" : true

This cgminer config gives about 50-60 higher khash per card, at the cost of system usability:
"intensity" : "18,18",
"kernel" : "scrypt",
"gpu-threads" : "1",
"thread-concurrency" : "20992,20992",
"lookup-gap" : "2,2",
"scrypt" : true

you can not go over 11000 TC because you use -g 2
just make one BAT file with this config:


This gives me 670 kh/s on all WF3 cards ... I have 9 now ... flashed with F43 BIOS.
https://forum.litecoin.net/index.php/topic,2641.0.html

P.S.: you can also try TC 16384 and 21712. It works even better for some. I got 20 kh/s more per GPU with 16384 but I also got around 5 HW errors/day, so it seems 24000 is optimal for my setup.

I try
but i only get


I add 1GB RAM,try TC 16384 and 21712, but problem is still :(

Now i mining with old settings   --thread-concurrency 10240 -I 13 -g 2 -w 256  1140/1420  608kh/s

delete any *.bin files in cgminer folder and try again.

I haven't seen much discussion on cooling here...If you have the card running inside a case with poor cooling, it will surely get hot. When I had a 7950 inside my gaming pc before the rest of my parts arrived, it would overheat and turn off. Cooling is much more of an issue with LTC mining vs BTC mining.

This is how my miner is set up right now. 3 Gigabyte 7950's spaced apart in a milk crate with a box fan blowing air in from outside. I live in San Diego so the outside air is pretty warm (I live inland, not by the coast).
http://farm8.staticflickr.com/7454/8730220674_0a0f6781fd.jpg

The cards run between 65 and 70 with my current config getting 1.773mhash/sec. I can crank it up an extra 150-200khash/sec by increasing the gpu-mem speed, but I like my fans running slower/quieter.  I used to run with constant fan/gpu values and it would yield better temps at night (58-62*) when the outside air was cooler, but with the auto-fan and auto-gpu, it will keep it 70* or less and turn the fans down.

Here is my config:

Wow, I can't believe it was something as simple as that!  I have literally tried everything I can think of to figure out why the hell I couldn't get any thread concurrency above 8192 to work in cgminer.  You are the man!  What's your LTC address?  I'm gonna send you some.

use setx GPU_MAX_ALLOC_PERCENT 100 on window
mine cgminer settings for ubuntu is
--gpu-engine 930 --gpu-memclock 1250 --auto-fan --temp-target 78   --lookup-gap 2  -I 18 -g 1 -w 256 --thread-concurrency 24000

and i have 600 kh/s with no HW errors

good luck...


btw mine is saphire with cpu at 810 mhz

Thanks for your settings