I'd like to know if I would see better performance with my:
HD 4850 (512mb) in PCI-E 16x mode
Two Nvidia 8800GTX (768mb), but because my Motherboard only supports PCI Express 2.0 at (single x16 or dual x8) will I actually have more sluggish performance with 2 Good Cards but at 8x.
My CPU should not be a bottleneck as at Full Settings its never gotten over 40%. AMD Phenom II X3 2.8Ghz BE (AM3).
I own all 3 of these cards (got the 8800's as a present), and know that I will need to get the 5900series eventually if and when my primary game (LOTRO) goes Dx11. But until then LOTRO, MW2, and Bluray playback is my top concern.
According to a basic 3dMark test on this site, that compared all modern Graphics cards it said that Two SLI 8800GTXs got 22,000 score while a single 4850 recieved 14,000. My main question is then will I actually lose out because my motherboard is only PCI-2.0 x8 when in SLI?
What is your board? If the board has an ATI chipset there wont be sli unless the card were to be a 7900 gtx duo, 7950 gx2, 9800gx2, or a gtx295. In the end test each card to see which one gives you the best score in the game that you play.