PC Critical Problem

[boosters]

I have a problem on my pc that my pc automatically power-off after every time well i play some games or when i open a high quality video's. Also when i Whenever i eject a cd and boot from a cd "WinXP" my pc was cut off .

"Jab be main CD dalta hu aur pc restart karta hu to pc apne aap band ho jata he. koi be game khalo yah koi heavy software start karte he to pc band hojata he"

PLease help me, what's the problem was going on here

Motherboard - Asus P5GC-MX
Ram 1GB DDR
SMPS - 450 Watt
G.C - geforce 8400gs

[Harvik780]

Kindly give the details of the brand of ur SMPS.
Seems you have the as called local SMPS.Buy a powersafe or zebronics SMPS.

[codename_romeo]

The problem is definitely with the smps. I think it is unable to run the 8400 card....... try removing that card n then run using ur onboard video adapter....... if the problem does not persist then its ur SMPS(culprit)!!!!!!