Will try that too, right now I'm reinstall the whole system.
Could you tell me what are your idle/full usage temps with this setup?
Sure, since I'm a stickler for heat. Here is the break down of my cards:
GPU1:
Reference Radeon HD 7970 + Accelero Heatsink
GPU2:
Sapphire DualX 7970 Non-Ghz Edition
GPU1 is a 3 slot design, GPU2 is about 2.5ish.
Originally with GPU1 in PCIE0 and GPU2 in PCIE1, I'd have the issue Blackened described where GPU1 was so big it was basically resting on GPU2. Temps for GPU2 were insanely high, easily hitting 70C+ on full load. The heat from GPU1 was just being dumped all over it. This also caused GPU1 to get high too since the heat from GPU2 was also being sucked into the fans.
So I swamped them. GPU1 is now on my bottom PCIE slot with about an inch clearance between itself and the PSU, and GPU2 is on the top PCIE slot with about an inch between it and GPU1.
Temps are right and clocks right now:
GPU1: 300/150, Fan @ 20%, 30C, 0.806v, Load 0%
GPU2: 300/150, Fan @ 25%, 30C, 0.96v, Load 0%
Let me load up a game, using my MMO Profile (where I'm more CPU bottlenecked thus no need to clock cards high)
GPU1: 925/1375, Fan @ 25%, 57C, 1.125v, Load 98%
GPU2: 925/1375, Fan @ 50%, 60C, 1.125v, Load 97%
FPS: 131
Now to use my "high performance profile"
GPU1: 1125/1575, Fan @ 25%, 69C, 1.175v, Load 95%
GPU2: 1125/1575, Fan @ 50%, 70C, 1.175v, Load 94%
FPS: 154
My system hard locked about 1 minute into my high performance profile. HAHA. If I had to guess my PSU gave the ghost. It wasn't temp.
I'm in the market for a new PSU but with my rebuild coming up in 5 months just going to wait.