Originally Posted by Yeong
How does 2 HD6750 perform ? 1gb DDR5 better or 2gb DDR3 better ?
Can I take one gigabyte 6750 and another ASUS 6750 and link up together ?
its just not worth going for multi GPU in the low end. Instead of getting two HD 6750 cards get a single HD 7850 . Superior DX11 architecture and much better performance in DX11 games. Also even at 1080p games like BF3 need more than 1 GB RAM for max settings. Also CF performance scaling can vary from game to game. In games where scaling is poor or the CF profiles don't work the HD 7850 will be vastly superior.
HD 7850 overclocks very well. At 1 Ghz matches GTX 570 and at 1.2 Ghz GTX 580.
HD 5770 - 49
HD 7850 (1 Ghz) - 100
GTX 480 -100
HD 6970 - 102
GTX 570 - 103
FYI HD 6770 is identical to HD 5770. so you see HD 7850 at 1 Ghz is twice the performance of a HD 6770. And compared to HD 6750 the HD 7850 is even more better.
here is the sapphire HD 7850 2 GB for USD 200 (190 after rebate)
if you want a card below USD 150 get the EVGA GTX 560 for USD 160 (130 after rebate)