hey. Got a problem when overclocking with my bios.

spec

amd 64 3200
asus a8n sli-deluxe (latest bios)
1gb pc4000 (2* 512) crucial ballistix ram

This is my RAM

http://techgage.com/review.php?id=1845&page=2

Whenever i try running my ram at its rated 450 mhz at stock timings (including 2T) it downgrades itself when its boots in to windows. The bios seems to set the memory divider really low. cpuz reports 160 mhz.

It only seems stable with my cpu set to 220 and ram at stock timings.

When i use clock gen to overclock in windows it works fine and allows me to go beyond 450 mhz.

any ideas?