Quote from: JayPhizzt on July 11, 2012, 02:32:39 PM

I have a Radeon 5970 in my server that I'm using for mining, but I'm having some issues with it. At first I had problems getting both cores to work, but I seem to have fixed that now. The problem now though is that the hash rate is fluctuating a lot between about 170-350Mhash/s on each core. Shouldn't it be more stable than that? When I try mining with only one core its a lot more stable and stays at around 340-350Mhash/s.
The GPU's are at stock-speed(725MHz) and I haven't done any clocking other than underclocking the memory to 500MHz(wont go lower than that in either CCC or MSI Afterburner).
Should also mention that I'm using WinXP 32bit, Catalyst 11.10 and Stream SDK 2.1. And I'm using GUIminer with phoenix to mine.

Also, I'm currently using these flags:

-k phatk VECTORS BFI_INT FASTLOOP=FALSE AGGRESSION=7 worksize=128

For some strange reason I get the highest hash rate when I set AGGRESSION to 7, any other number and hash rate drops.

Anyone have any idea of what could be the problem?

i get the highest hash rate at 6 and 7 aggression too, but i don't believe it, so I use 9 instead

it shouldn't fluctuate that much though. @ 6 or 7 i might see jumps from 360 to 390 or something like that. did you try checking temps? it could be throttling itself