Got the answer form intel website, here it is.
Dual-Channel DDR 400/333/266
FSB/Memory Configurations: 800/400, 800/333, 533/333, 533/266, 400/266
Single DDR 400/333/266
FSB/Memory Configurations: 800/400, 800/333, 533/333, 533/266, 400/333, 400/266
So, I can run my 100Mhz FSB of 2.0Ghz with 333Mhz Ram. Not to bad.