PC turning off suddently

[pedro_es]

Hi, I built a PC with this configuration:

Core i5 750
Video Board HD5850
4GB RAM
Seventeam 850w
Windows Seven Ultimate 64 bits
Mother board Asus P7P55D PRO

PS: the stabilizator is 1000w and it's old.


But, ramdomly my PC turns off, it can be 1 second after I turn it on, or 1 min, or 15 min, etc...
I don't know what is going on. Please help me.

 

[starlitjoker]

reset cmos
ugh bad powersupply
check 24 pin connection to mobo
check every other connection
loose wiring?
xposed wiring?
take out all the ram boot up
boot with 1 stick

ps: never heard of seventeam probably bad powersupply look into an
ANTEC earthwatts PSU
or a
Corsair PSU.

dont go cheap on power supplies

 

[pedro_es]

reset cmos
ugh bad powersupply
check 24 pin connection to mobo
check every other connection
loose wiring?
xposed wiring?
take out all the ram boot up
boot with 1 stick

ps: never heard of seventeam probably bad powersupply look into an
ANTEC earthwatts PSU
or a
Corsair PSU.

dont go cheap on power supplies

I checked everything and it's all right....
Any other idea?