I have 3 different boards, NF7, Gigabyte and a Albertron all are ultra 400 models. 2 2500s and 2 sets of hyper x 3500 256 memory. All 3 board will run 200 mhz to reach 3200mhz, but only in the same channel not dual mode. Rock stable in single channel. Will boot into XP but will be thrown out after a few minutes in 3d programs....The Abit will even run 220 at 11 multiplier, but only in single channel. I have max voltages on memeory, agp, chipset and cpu with no go. All 3 boards run dual channel fine except when I approach 200mhz. These 2 bartons will run as 3200s at stock voltage just not as dual channels. Anyone have this problem? Any insight will be appreciated