This is probably a stupid question, and the answer is probably real simple, but.. check this out. If I run my FSB at 166MHz and my memory is set to 133MHz, the RAM runs at, as one would expect, 166MHz. But if I run my FSB at 166MHz and my memory at 100MHz, it says that my RAM runs at 125MHz. Anyone know why? -- Postscript: I'm running an Athlon 1.4GHz on a EPoX 8KHA+ with 512MB of Transcend PC2100.