You need to flash the bios on those cards to get 700khs
In depth how-to is below.
https://litecointalk.org/index.php?topic=8984.0
http://www.techpowerup.com/forums/threads/how-to-use-atiflash.57750/
Topic: XFX RADEON 7970 FX-797A-TDJV low hash troubleshooting SCRYPT* (Read 1101 times)
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.
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