ahh oops, you got that covered in your last post!! so good deal then, I was looking through the manual and MSI states that there are some rules at the maximum speed you can run DRAM at according to the type of dram, single sided, double sided etc... it will allow you to use pc3200 ram at full speed ddr400, fsb200 if you have more than one stick, they both need to be single sided memory modules to run at ddr400.