Supporting NVIDIA Quad SLI™ technology, with true dual PCI Express x16 connectivity for up to 4 of the latest NVIDIA GeForce® 8800 GPUs, GIGABYTE Quad SLI ready motherboards provide flawlessly smooth 3D video rendering and screamingly-fast frame rates. With an additional PCI Express x8 expansion slot, users are able to add a standalone physics graphics processor for a significant boost of graphics performance, taking games to the next level of hyper-realist detail and effects.
my memory is a bit rusty, and it was in an article that THG posted before (its most likely archived now)... but i believe the reason for the poor quad sli performance was due to the performance and architecture limitations that DX9 and earlier suffered from... given that, there 'should' be a substantial improvement moving up to DX10, even with quad sli, because they completely reworked everything... though were still waiting on improved drivers, SP1, etc... ...even still though, youd definetly want to wait for reviews anyhow, standard sli is better suited than quad sli as it stands right now
Its also important to determine if any CPU is worthy of such GPU setups or if 1 GPU Highly OC'ed would be the best. For the price of 1 ultra almost any OCing kit is available. Vapor phase change is possibly the best OCing tool and comes in just above the price of 1 8800 ultra. http://www.octools.com/index.cgi?caller=articles/asetek...
Ive seen benchmarks of OC'ed 8800's were even 3.7GHz CQD's bottlenecked the GPU's.