Need help with Gigabyte 7970oc windforce edition **FIXED over 720kh now **

[mercSuey]

Here is something strange, I reset GPU back to stock settings 1000/1375 and tried these settings with no overclock

--thread-concurrency 8192 -w 256 -v 1 -g 2 -I 13

GPU 0 - 520kh
GPU 1 - 720KH

WTF??  any ideas

you reset the settings on only one gpu, maybe?

hahahaha, your right, forgot I had to do the 2nd card on the drop down box... :-)

at a certain point in all this I remember my brain just going...blehhhh.  And I went to bed.  lol

[sikman]

Hmm i might try your fix with the 13.3Beta_3 drivers. I had given up trying to get my HIS ATI HD 7970 IceQ X² above 600kh/s. It seems to want to run at 550-580kh/s no matter what I try. Already attempted to flash numerous bios files with either no improvement or brick(and thank god the dual bios saved my ass a few times!).

Mate it looks like you have the EXACT same issues as me, amazing that 13.3beta worked

Just one advise,

do this:
run amd_cleanup_util_1.2.1.0 utlity to remove all your drivers, reboot and then install new drivers

Yep.  This was my breakthrough as well when I was messing with my other rigs a few weeks ago.  Drivesweeper and Atiman uninstaller, plus going into appdata and win32 and win SYSWOW64 folder and deleting all amd and ati folders/files.

It was doing my head in, thanks for your help and everyone else. Hopefully this thread will help many others as well.

[yager]

damn, still no good for me.  

[mercSuey]

damn, still no good for me.  

did you try core clock at 1085?

[whitedragon]

Ya anybody else having trouble you really need to play with your engine setting to find the magic number.  Set your memory to 1500 and your engine to 1044....or if you want start engine at 1050.  Then move it up or down one number at a time and try to find your sweet spot.  ONE NUMBER can make a huge difference...for my card the engine speed at 1043 = 580kh...at 1044 = 720kh....then at 1046 = back down to 580kh.

[erk]

OK, so now GPU 0 is at 705kh but runs at 92 degrees, while GPU 1 runs at 720kh and only at 78 degree!!

Your fans are too slow make sure they are running over 3,000 RPM which is about 60%, many people like to lock them at 80% but I find that a bit noisy.  --auto-fan should work on gigabyte cards, cgminer sets the temp to 75C if you don't specify it.

[mercSuey]

Ya anybody else having trouble you really need to play with your engine setting to find the magic number.  Set your memory to 1500 and your engine to 1044....or if you want start engine at 1050.  Then move it up or down one number at a time and try to find your sweet spot.  ONE NUMBER can make a huge difference...for my card the engine speed at 1043 = 580kh...at 1044 = 720kh....then at 1046 = back down to 580kh.

I just want to reiterate what whitedragon said. Plus or minue one to core or mem clock can change my 7970 hash rate from 730+ kh to like 550 kh.  And it's a cumbersome process, but it's also the best way to find your rig's sweet spot.