computer issue :S

[skinner88]

here the issue its starts up and it will randomly crash totally powering down and will not start up unless i drain the power to the pc ie pulling the plug and usaully happens 2 or 3 times before it works again which is really annoying.

i am running on

Motherboard Asus M3A78 Pro AMD 780G
4 gigs of ram not sure wot type t was
Graphics card 9800 GTX+ dark knight
PSU: OCZ StealthXStream 600w Silent SLI Ready ATX2
CPU: AMD Phenom X4 Quad Core 9850 2.50GHz Black Edition

i have been told it was the motherboard from a different site but i wasn't sure, i brought all of the components from overclockers expect case, i think its gone over the site warrenty what should i and do you think its the motherboard

 

[GinG]

Have you overclocked at all?

 

[skinner88]

not at allisn't really need to be fair haven't got any games that need better performance than what the pc currently provides, and the cpu is the AMD Phenom X4 Quad Core 9950 2.60GHz Black Edition not the AMD Phenom X4 Quad Core 9850 2.50GHz Black Edition