Dbo, with Athlons, you HAVE to keep the memory & the FSB in sync. Your processor has a 333Mhz (DDR) FSB. Are you saying that you've got your processor over-clocked? Personally, with your proc., I would change the multiplier to 10x and the FSB to around 215 to 220 (which is really 430-440 DDR). That would get you the most out of both your processor and your memory.