XFX 7970 not over 550 khash/s ?!

[ocminer]

Hi !

I've got three new XFX 7970 (Ghost Edition, the normal ones with 925 MHz store clock)...

Well.. I'd say I really tried every possible MHz combination, running 1075/1680 now but cannot achieve more than 550 khash/s .. (under linux with SDK 2.8 and AMD 13.3 beta 3)

Also voltages seems to be locked, as I cannot change them.

Did someone try to flash an other BIOS onto this cards to get it running properly or has anyone got better mhz combos ?

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[marketermac]

I've actually gotten the best results @ 950 / 1425.

Overclocking them anymore makes my rates drop...I'm using sapphire & gigabyte cards and both have reported the best results at these numbers for me (around 630-640khash).

[MaGNeT]

My 2x Gigabyte HD7970 OC cards are running on the following settings:

Code:

start /D "C:\cgminer" cgminer.exe --scrypt -o coinotron.com:3334 -u Worker.1 -p x --thread-concurrency 8192 -I 13 --lookup-gap 2 --worksize 256 -g 2 -d 0 -d 1 --gpu-memclock 1600,1600 --shaders 2048 --gpu-engine 1050,1050 --gpu-fan 60,60

[ocminer]

Hmm strange all these combinations don't work for me..

Could someone with a XFX Ghost post their results ?

[BBQKorv]

I had similar problem with one of my 7970s, I just kept messing with MSI AB, deleting AB's "profiles" folder, resetting Catalyst overdrive, powertune, changing cgminer clocks, and so on. Finally the slow card picked up the same speed as all of the other cards. Still no clue what was actually wrong, all the settings are same as before, but everything has been touched and changed a bit back and forth to refresh them many times.

You could try to switch places so the slow card goes to other cards place and see if there is a difference.