NVIDIA Quad SLI Take Two - 9800 GX2 up to bat
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Quad SLI Technology
Quad SLI is a familiar term to us - not only have we had to hear about for months building up to today's release but NVIDIA has tried this once before. The card of choice (well, really there was no choice) was the GeForce 7950 GX2 and the success of the platform was less than spectacular. After being met with lackluster performance results, small lists of compatible games and eventually complete abandonment at the hands of NVIDIA when Vista came in to the fray the company definitely needed to rethink things.
This time Quad SLI is being brought to the masses (with masses of cash) with the help of the recently released GeForce 9800 GX2 card - a combination of two G92 GPUs on a single graphics board. Despite being expensive the 9800 GX2 was still a very impressive card for its overall performance. As you might guess, pairing up two of these cards gives us four total GPUs, thus the Quad SLI moniker.
Unfortunately for NVIDIA (and AMD) taking advantage of those extra GPUs is harder than we'd hoped.
Quad SLI Technology - you already know this
In our first 9800 GX2 review we basically covered all the information and technology behind what makes Quad SLI tick:
the good old days (um not really good for those that bought it) NVIDIA
achieved Quad SLI by doing "AFR of SFR" which basically took two pairs
of GPUs, set them to do split frame rendering and then alternated those
frames. With late DX9 and DX10 titles, SFR is really no longer an
option as even AFR is getting more difficult to work with, so the idea
of "AFR of SFR" was canned.