The guys at TweakTown have pit two of the top DDR3 kits available today against each other to see which one stands up to their scrutiny. They've got a SuperTalent kit running at 1866MHz, & the Corsair Dominator kit, which runs at 1800MHz.

"DDR3 is still a parallel architecture rather than the serial nature that RDRAM tried to bring in. Like all of the DDR memory we have seen, the technology is derived from the old SDRAM modules that were so popular back when Socket 7 and Pentium II / III were at their peak."