Re: Low hashrate on 7970 scrypt? Under 700Kh/s? Here's what to do...
Picked up 6 of those XFX 7970's from TigerDirect on the black friday deal.
very unhappy to say the MAX i can pull from these cards is ~560 hashes, even massively overclocked.
Would like to see if anyone else bought these, and have had any luck getting these to normal 7970 rates? (~650-750)
Card specs are as follows:
XFX Double Dissapation, Core edition model FX-797A-TDJV.
Version 1.0 on box
NON-REFERENCE PCB/matte black, NO ATI logo on bottom of card or BIOS switch at top.
clocked at 925/1375 stock.
GPUZ screenshot attached.
MAX hashrate i was able to achieve was about 560khash, at about 1110/1675 clocks, with 7192 TC, 13 intensity, and 12.8 drivers.
tried 13.4 as well, same problem.
tried 24000 tc, tried 40960 tc, tried 8192 tc, tried I20, I19, I18, all give lower hashes.
Funny thing is that the powertune settings dont seem to affect hashes at all, or even power consumption, tried it at +20, same hashes, tried it at -20, same hashes as well as same power pulled from the wall. Maybe this has something to do with the LOW LOW hashrate of these cards.
in the screenshot, you can see my 7950 outperforming these by a longshot.
this was all on a clean install of windows 7 64bit.
very unhappy to say the MAX i can pull from these cards is ~560 hashes, even massively overclocked.
Would like to see if anyone else bought these, and have had any luck getting these to normal 7970 rates? (~650-750)
Card specs are as follows:
XFX Double Dissapation, Core edition model FX-797A-TDJV.
Version 1.0 on box
NON-REFERENCE PCB/matte black, NO ATI logo on bottom of card or BIOS switch at top.
clocked at 925/1375 stock.
GPUZ screenshot attached.
MAX hashrate i was able to achieve was about 560khash, at about 1110/1675 clocks, with 7192 TC, 13 intensity, and 12.8 drivers.
tried 13.4 as well, same problem.
tried 24000 tc, tried 40960 tc, tried 8192 tc, tried I20, I19, I18, all give lower hashes.
Funny thing is that the powertune settings dont seem to affect hashes at all, or even power consumption, tried it at +20, same hashes, tried it at -20, same hashes as well as same power pulled from the wall. Maybe this has something to do with the LOW LOW hashrate of these cards.
in the screenshot, you can see my 7950 outperforming these by a longshot.
this was all on a clean install of windows 7 64bit.
Hi, only just seen your post.
Just to check quickly, as it wasn't in the command line you wrote - did you use -g 2 (-g is threads per GPU btw) with the 7970? If you don't put - g 2 in i believe it uses -g 1 which gives a lower hashrate.
I currently use this for my 7970's btw: -s 2 --thread-concurrency 20992 -I 13 -w 256 -g 2 1040 gpu / 1500 memory (1081mV/1500mV)
yeah, sorry forgot to add that, i am using 2 threads, that, with 8192, i can get a max of 560 as i said Just to check quickly, as it wasn't in the command line you wrote - did you use -g 2 (-g is threads per GPU btw) with the 7970? If you don't put - g 2 in i believe it uses -g 1 which gives a lower hashrate.
I currently use this for my 7970's btw: -s 2 --thread-concurrency 20992 -I 13 -w 256 -g 2 1040 gpu / 1500 memory (1081mV/1500mV)
I used the bios suggested here (didn't take the first time. had to reboot and flash it again) and am getting 730Kh/s now using one those tiger direct specials. (This is a friend's card)