What is the price of the 4GB version of GTX 770? I don;t think it is below 35K. For 1080P 2GB or 3GB is enough. before purchasing, do consider the price/performance ratio also. You can get a HD 7970 OC version below 30K (around 28K/29K) and even a normal 2GB 770 at at 32K. With that you won't get any improvement over 4 to 4% at maximum. If you go through the review, you will find out that in most reviewers option that although AMD CF solution is still behind nVidia, while gaming, you will hardly notice any issues and with newer driver update, you will get more improvement in that area. So make your decision accordingly. In pen and paper, those differences look real big but while gaming when your concentration is on Gameplay, you can hardly differentiate between an nvidia SLI and AMD CF with the latest drivers. But if you record the game play video and then watch it, you might find some of the glitches.