Need help with SAPPHIRE HD 7970 3GB GDDR5 OC with Boost

[JuanHungLo]

This card is driving me nuts.  I cannot get over 550Kh/s no matter what I do with cgminer 3.5 or 3.7.2

Model number: SAPPHIRE HD Radeon 11197-03-40G

Here is the BIOS for this card: Sapphire.HD7970.3072.120925.rom
bios p/n as reported by AtiFlash is 113-2104XTHY-0B5

Rig is Win 7 64 prof.  4GB 1066 Corsair DDR3 in AsRock 790 Extreme3 MB, Rosewill LIGHTNING-1300, 4 riser cables, Sempron 145, SSD HD.  Rig never gets too hot in crate with huge fan constantly circulating.

Current cgminer config (although I have tried just about everything):

setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1
cgminer.exe --scrypt -o stratum+tcp://gigahash.wemineltc.com:3334 -u UUUUUUUU.1 -p PPPPPPP --shaders 2048 --thread-concurrency 10240 --intensity 13 --queue 0 --worksize 256 --gpu-fan 50 --gpu-engine 1075 --gpu-memclock 1500 --gpu-vddc 1.125 --gpu-powertune 20 --no-submit-stale -g 2 -v 1 --lookup-gap 2

I have moved the switch to the 1 setting for flashable ROM on all 4 cards.  I flashed ROM with 3 older versions of Sapphire HD Radeon 7970 bioses, 2 crash and other 1 is no change.  I did this test on GPM #2.

Please advise.  Thanks.

[Gazza1]

1050/1500 and 1080/1500 work best for 7970s.  also tc of 8192 and remove -v 1
make sure to delete the old tahiti file in the cgminer folder first when you change thread concurrency.

also see if you can get by with powertune 0.  +20 was the hype previously but usually not needed.

[JuanHungLo]

1050/1500 and 1080/1500 work best for 7970s.  also tc of 8192 and remove -v 1
make sure to delete the old tahiti file in the cgminer folder first when you change thread concurrency.

also see if you can get by with powertune 0.  +20 was the hype previously but usually not needed.

Thanks for your reply.  I just did as recommended and went with the 1050/1500: net result is gain of 10Kh/s.  I am still nowhere near what others report of >700.

Any other ideas?  Are there any motherboard BIOS defaults that could be changed to help?  Just guessing...

[Gazza1]

did you change tc to 8192 and remove v 1?

[JuanHungLo]

did you change tc to 8192 and remove v 1?

Yes. 

I am really wondering if a BIOS flash to something else might help.  All 4 of these cards are refurbs.  They look brand new but it makes me wonder if Sapphire didn't flash them.

[JuanHungLo]

Ok, here is the link of a post that has worked for me.  Maybe it will for you, too, someday:

https://bitcointalk.org/index.php?topic=200777.msg3870088#msg3870088

Now getting >700!