Hi all newbie here!! Ok i am at my wits end here & i need help! Pc runs fine when on windows/downloading/surfing the web even if i leave running for days!!! BUT when i play a game i.e Doom 3 it will crash/freeze after 10 mins or so of playing!! seems to happen quicker when playing doom 3 though even though it has crahes/freezed with delta force black hawk down! now this is only started happing in the past couple of weeks & i have run out of ideas!! 1st time it happened i renstalled new video/graphics drivers no change then i borrowed another graphics card Gforce ti 300 still crashed/freezed then i tried another power supply Mercury 300w (same as the one that was in it) thinking it was this at fault as it was maybe needing more juice just to run games & the power supply might have been on it's way out! BUT still crashed/freezes! ok my last option was to reformat Drive C: (op drive) reinstalled Xp & service pk1 & thought i may as well try service pk 2 reinstalled all my drivers video/mouse/sound ect then installed doom 3 tried game crashed/freezed again!! now it's not just doom but other games also & when it crashes i cant get back to desk top or do anything!!! before this was happing the pc was playing games fine! SPEC: Windows Xp pro service pk 2 Amd 19+ Jetway V33Da 768MB Pc 2700 333mhz 60gb Maxtor 8mb cache 7200rpm 200gb Western digital 8mbcache 7200rpm GeForce 4TI 4400 128mb Detonator 61.77 Soundblaster Audigy2 i know this is a shot in the dark as there is that much that can go wrong with these but i am thinking it could be hard ware related now!! system is 2 years old & was built by my older bro & he cant understand why!! could it be heat related due to it only happing in games? Checked pc temp in bios current system temp 29*c/84*F current cpu temp 55*c/131*f current cpu fan speed 5818rpm & the pc has been running for the last 6hrs! p.s nothing over clocked everything standard!