Pc has started switching itself off and on again

[shirvtastic]

The frequency of this has increased so now the pc is not useable. Have tried a different power supply but does the same thing. Does it sound like Motherboard issue ?

 

[hunter315]

What are your system specs?

When it does this are you doing anything particular? Does it turn off when at load or does it do it when its idle too? What are your temps at?

What power supply did you have and what did you replace it with?

 

[pjmelect]

More information needed, It could be the motherboard but the chances are that it is something simpler to fix. What are your temperatures? Have you run a memory test program? Have you tried running with only one stick of memory? A different graphics card?