My pc turns off when i plays games

[sujan]

my pc automatically turned off when i play pc games..high graphic games....i found these wid speedfan
Win9x:NO 64Bit:NO GiveIO:YES SpeedFan:YES
I/O properly initialized
Linked ISA BUS at $0290
Linked ATI SB400 SMBUS at $0B00
Scanning ISA BUS at $0290...
SuperIO Chip=DME1737
Scanning AtiIgp SMBus at $0B00...
DME1737 (ID=$8A) found on SMBus at $2E
Found ST380011A on AdvSMART
Found ACPI temperature (40.0C)
End of detection

my pc is window xp,intel,graphic D1O1GGC

 

[mi1ez]

what games?
what PC (make/model)
what CPU, PSU, graphics card?

 

[jsc]

Probably either a driver problem or inadequate power.

System specs?

 

[Hawkeye22]

It may also be a heating problem. Try running it with the case cover off. Knowing your system specs will help.