Well I attempted to upgrade this MB. Bought new 512MB pc266 RAM. New(used )AMD-XP 2400+ (Thoroughbred) CPU. Ran w/ the RAM and Win2000 for a few weeks (buss at 200, due to the MB having a 200Duron, 200CPU, 200 RAM). Got the processor and put it in. board has jumpers 9/10 to set fsb at 266. Win2000 BSOD's on boot. Fine... Tried everything to get this to run at 266... Nothing. Board has the latest BIOS, will run DOS at 266, Will not run Win2000 or a Linux iso at 266, not stable... any suggestions? MB or OS's.....?????