Interesting that 2 x 690s are so far behind 3 7970s.
I know Heaven seems to favour AMD cards and I know that multi GPU scaling gets worse as you add more cards, but still, that's a pretty huge difference considering the Nvidia setup costs ~£1680 and the faster AMD setup costs ~£900 (and also gives you an extra 1GB VRAM).
However I'm guessing if you have either of those setups you maybe well use higher levels of AA & AF than these benchmark settings and possibly at a higher resolution (multi-monitor?)
If run at higher settings does the Nvidia setup gain or lose ground on the AMD setup?
I guess this thread might not really be the place for it, is there currently a thread that deals with these really high end setups using the really high end settings
At the settings used here for this thread I have no chance of matching 3x 7970s. If the benchmark is run @2560x1600 with extreme tessellation, 8x AA and 16x Anisotropy. I can get the better of them just but its still not good (3 GPUs vs 4 GPUs).
What is strange is the GTX 690s have only 2GB of vram per GPU compared to the HD 7970s 3GB yet the GTX 690s perform better under the heavier settings workload.
What would be interesting is what the performance is like on a multi monitor setup comparing both setups.