Well I just bought 2 x kits of the CORSAIR TR3X3G1866C9DF 3GB PC3-15000 (DDR3-1866) to make 6gigs. I hope it works I will report in when I get my new kits. I will be using a i7-920, P6T Deluxe, and I will cool it with a Swiftech GTZ block. I will update my sig soon with all other parts.