Hi and thanks for taking the time to read this. I bought a mercury pvt800x-l motherboard with a P4 2.6ghz HT processer,but whenever i run a processing power intensive program e.g gta san andreas or converting it just crashes and turns off after which it wont turn on for another 15minutes, @first i thought it was overheating so i bought another fan, to no avail PLUS i also noticed that i can NEVER restart my computer EVEN FROM FREEZING COLD ruling out overheating as the problem i need to wait about 15min in between each bootup. I have managed though to get it working by changing the jumpers on the motherboard (jbat2 short 2/3 and jbat3 short2/3) to 100 as opposed to 133 or 200 the problem now is that the processer only runs at half power meaning that in the win xp sys info it says ive got a P4 2.6ghz HT but ALSO that its only running at 1.3 half power, Can anyone help ive been scouring forums everywhere my problem seems unique i need my extra processing power for games and converting. p.s while its running @1.3ghz there are no heating problems at all even after 2 solid hours of converting!!!