Originally Posted by ComputerRestore
Thanks for the info. I will try the lookup-gap 0. I do run a higher thread concurrency, I just thought it was interesting that that combination I posted gave me 700Kh/s but was all HW errors.
Looking through many of the Mining threads of various groups, it looks like XFX Cards are just bad for Litecoin. (and various other Non-Reference Cards as well)
Knowing that I will just settle with my 490Kh/s on this card and have worked on getting the power usage as low as possible.
I run these settings on my XFX 7970:
-I 13 --thread-concurrency 8192 -w 256 --lookup-gap 2 --gpu-powertune 20 --gpu-memclock 1750 --gpu-engine 1050 --gpu-fan 85
That gives me 560kH/s
I can break 600 if I push the overclock further, but that's not sustainable. This setting seems like a good compromise.
On a related note, I've been reading some forums on this subject. It is apparently possible to flash the bios in this card, and increase the hashrate to what a 'normal' 7970 should get.
I haven't been able to find enough info on it yet to be willing to give it a try. The trick is that the bios to flash is not an XFX bios. I think it's a Gigabyte bios. If it works it should be able to reach 700+ without breaking a sweat.