My Computer Switch Off Automatically

Hye...

Sorry if i post in wrong section
I am a new boy
My English also is not good

I wanna ask some question about my problem:

1.When i play some games like Black Ops,NFS Undercover,Darkviod,Gears of War and anything else,
my cpu automatically switch off suddenly after playing a few minutes..

Can you all tell me what is the problem and how to overcome it???
:D

My SPecs:

Windows 7 32 Bit
AMD Athlon 64 X2 4800+ (temperature shown at Speccy always above 68 celcius)
4.0GB Dual-Channel DDR2
Gigabyte M61SME-S2 > mobo
ATI Radeon HD 4650
500 Gb WD Caviar green
420 Watt PSU
5 answers Last reply
More about computer switch automatically
  1. someone please help me
  2. Something is probably overheating and your computer switches off as a safety precaution.
  3. >NoCanDo

    What can i do??
  4. First logical suspect is PSU...; all power supplies are not equal...

    Best not to have one loaded at even 80% of it's rating....; always better to have 150 watts to spare, than to hope your 500 watt max PSU handles 425 watts consistently, without end...
  5. thats mean i hve to buy a new PSU laa...??
    500 watts or 750 watt?
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