hi guys start of i have posted once b4 exact problem.but heres the over view and updates been done since last post.start off with whats under the hood.
PSU HIPPER 730WATT TYPE R
CPU- INTEL CORE 2 DUO E6750,2.66 NOT CLOCKED
2GB OF DDR2 KINGSTON HYPER X
ATI 4870 512MB
MOBO-ASUS P5Q-E
WITH 1TB SAMSUNG SATA AND 500GB WESTERN BLUE SATA
Heres the problem everytime i run a game for 30-40 min my games freeze up sometimes back to windows. now my video drivers are up to date infact ive tryed older ones too. so i have benchamrked the system useing 3DMARKS 06 AND PC WIZARD 2010 (ONLY TO STRESS OUT THE SYSTEM) thinking i could get a lock up again i dont! it passes no problems from testing cpu to vga to power to direct x and whole system. both apps complete with no crashes.yes if i run streetfighter 4 benchmark it freezes.
and of course games in general. now i have ran windows 7 to start off that gave me issues sais somert about display error or dx. after the game freezes now im back with xp i do not get errors but i get the freezing lockups.
any help would be good thankyou.
i am wondering if it could be my psu as it is old now 2007 think and was bought off someone.cheap and have read there not the best but the psu was running a gts 8800 b4 i had it fine but we talking 320mb card here not ati 4870

PSU HIPPER 730WATT TYPE R
CPU- INTEL CORE 2 DUO E6750,2.66 NOT CLOCKED
2GB OF DDR2 KINGSTON HYPER X
ATI 4870 512MB
MOBO-ASUS P5Q-E
WITH 1TB SAMSUNG SATA AND 500GB WESTERN BLUE SATA
Heres the problem everytime i run a game for 30-40 min my games freeze up sometimes back to windows. now my video drivers are up to date infact ive tryed older ones too. so i have benchamrked the system useing 3DMARKS 06 AND PC WIZARD 2010 (ONLY TO STRESS OUT THE SYSTEM) thinking i could get a lock up again i dont! it passes no problems from testing cpu to vga to power to direct x and whole system. both apps complete with no crashes.yes if i run streetfighter 4 benchmark it freezes.

any help would be good thankyou.
i am wondering if it could be my psu as it is old now 2007 think and was bought off someone.cheap and have read there not the best but the psu was running a gts 8800 b4 i had it fine but we talking 320mb card here not ati 4870