The i850/i850E chipset supports 3x and 4x RAM multipliers, based on your true bus clock. PC800 runs at 400MHz, PC1066 runs at 533MHz. I'm sure you can multiply 100 and 133 by 3 and 4 to come out with all the speeds.
<font color=blue>You're posting in a forum with class. It may be third class, but it's still class!</font color=blue>