hmmm...
kind of off topic a bit, but related...
as far as SLI, I know that you need to have matching chipsets, but in the case of say a G92 core 8800GTS 512MB, and a 9800GTX 512MB, being the 9800GTX uses the same core, & some minor differences like clock speeds, shouldn't it be possible to SLI those two cards together, granted their 2 "different" series, but technically aside from some minor differences the cards are the same (same sort of thing as the 8800GT & 9800GT or 8800GS & 9600GS/GSO)
or is there some sort of differences with the shaders or other parts?
I know a 9800GTX+ would be out of the question, smaller Die chip etc.