Topic: (LTC Reward) Gigabyte 7950 - Settings Nightmare - page 3. (Read 15663 times)

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!

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

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.

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.

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:



hope that helps

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

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?

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.

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

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

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.