Originally Posted by Stevethegreat
With all due respect I just don't think that the scaling is ought to be so slight. Excluding driver's problems you should be getting upwards the 70% compared to single card performance. It seems to me that you're bottlenecked by the CPU. Maybe it's time to retire the i7-920. The good ol' chap has seen too many battles (reviews) and maybe lately he's fudging your results.
Try a Sandy Bridge at 4.7GHz (or even better an Ivy Bridge) and you'll get different results me thinks, especially on lower resolutions. Let those little beasts -your GFX cards- breathe.
Apart from that, great review as always very methodic and the most informative compared to all the other sites...
I agree in the part that sli and cfx will be bottlenecked with the i7 920. at least in 1080p