Hi all, I spend the last 3 days and tried to enable SLI on my new pc. I got: Gigabyte P55A-UD4 (Bios F15) Intel i7 - 3.2 Ghz 8 GB RAM 950W PS Gainward 460 GTX -2 GB (1st pci-e) Gainward 460 GTX -1 GB (2nd pci-e) SATA3 HDD from WD (1TB) and other stuff (Blueray, DVDRW, 2 x SATA2 HDD) For some reason I am unable to enable both in SLI. I am using nvidia driver 260.99 and also the whole gigabyte driver are the latest one. The system recognize both cards and define the Physics right. But no sight of SLI. I have searched the net for solution and tried to rollback drivers, so instelling just one and then add the another. I also tried it Win XP without success. :bang: Any suggestion what might be the reason? thx.