most probably dis mobo were not meant for OC....

btw, i think ur problem here might b ur ram can't OC as high. coz wen u push the fsb, the RAM will OC as well (if u dun touch the ram multiplier).

try either:
a) lower ram multiplier + loosen timing
b) pump more dram voltage + loosen timing

edit: typo

This post has been edited by tech3910: Feb 26 2010, 05:01 PM

wen u oc, dun oc the ram 1st.....
lower the ram multiplier to it dun go over o run too far off stock speed.

once u reach the desirable OC speed for ur processor, den only up the multiplier to see ur ram can go any faster.

den wen u happy wit the ram speed, den only play wit timing, maybe try to tighten it....

wat happen if u do 250*10, ram multiplier x2.5?

i'm afraid u might edi hit the OC limitation for ur board....
if u really looking to get the most of of ur processor, get p35/45 board....

the problem i see here.....
most of the option r locked o not available @ bios.
in order to push clock, u hav 2 push fsb, which result in pushing ram clock also bcoz all these r linked....
ur processor & nb hasn't hit the wall, but ur ram might edi hit the wall, cant go further, causing the oc to fail.

another thing u can try, slap in higher frequency ram, like DDR800....
see if u can push it higher.

dat would depends on the oc ability of the ram chip.
IMO, most probably it wont b stable @ 833MHz

try testing wit prime95 or IBT