Thanks Nancarrow, mind if I ask what miner you use? I was surprised I couldn't get acceptable performance out of any of the others I'd tried. I was definitely expecting a bump when I tried CGminer, in particular, but instead I saw a noticeable drop.
1) I initially had both tabs set to 11 but it seems 10 is as high as I can go without seeing my CPU activity increase so I backed them down a bit to 10. Any ideas?
About the "CPU Affinity" boxes... I'm assuming those are my two CPU cores but don't know what should be checked/unchecked there or if it would prevent me from "turning it up to 11"
so I left the default, on both tabs I have core1 checked and core2 unchecked. Is that the correct setting? Now I'm in a mood to watch some scenes from Spinal Tap, btw, haha.
2) 300 was a guess and made a world of difference in regards to heat. I just bumped it down to 225 and lost no performance.
What do you use to tweak your mem clock? CCC and MSI Afterburner won't go below 500. I have been opening CGminer so it sets the mem clock to what I have set in the config file, then closing it to run GUIMiner. Kind of a pain and then I have to remember to reset the clocks in CCC or Afterburner when I want to play Diablo 3 instead of mining
I wonder if it is possible to game on one GPU while the other mines... hmmm. I think you can't disable Crossfire on this card though :/
3) My card has been treated well and kept cool. It reset the driver when I had jumped it to 825 MHz the first day I was screwing around with mining (this week, lol) so just knocked it back to 800 right away. You are probably correct that I could bump it up to somewhere in between. I have it at 810 now and seems stable. May push it more after a few hours.
Soooo, after bumping the memclock down to 225, leaving aggression at 10 and increasing to 810 GPU clock I was still only getting 670-685 MHash/s.
HOWEVER!!! I swapped the kernel to this one : https://bitcointalk.org/index.php?topic=25135.0
and am now seeing 355 on each core easily, for 710 MHash/s combined. Nice bump!
When I run only one GPU they will do 360 MHash/s but when I fire both up, they drop a bit. It didn't seem to happen with the other settings I've had before. Any idea what to tweak to fix that? I tried upping the mem frequency but it made no difference.
In regards to the flags I'm using, I'm assuming I don't have to specify platform and device since it says 0-0 and 0-1 already in the tabs of GUIMiner, correct?.
Thanks again, and sorry it took me a while to respond, I wanted to tweak and figure out what I could before asking more things