ive just bought myself asus P5Q3 i would like to know why i couldnt boot up to windows (im always having IRQL_NOT_LESS_OR_EQUAL BSOD message) when i overclocked my processor to 4ghz (500x8), at approximately 1.62v

my old board p5k pro will give over voltage alarm when i try to set in bios more than 1.65v, but this mobo gives off the alarm at 1.6v... ive ignored the warning anyway and continued the startup... rams was at 1666, i thought it was ram problem... when i downclocked it to 1333, the problem is still the same...

any ideas what is the prob?

ps: it seems i have a fsb wall of 500mhz with q6600... will changing to 45nm procs give me a higher fsb wall? @@

just wanna oc and do some benchmark test >"<... btw my temp at 1.6v is not that high la @@ idle just below 50c, not reli serious @@