What xould happen if my PSU isnt powerful enough?

[Dorito]

well?

 

[Nohr]

Your computer might not start up at all though random crashes are more common. I had one overworked PSU which died on me in the middle of a UT game. No sparks, no smoke, computer just turned off suddenly and wouldn't come back on.

 

[pookie69]

Before i upgraded to my Antec TrueBlue 480W PSU, i used to experience random reboots a lot. As soon as i upgraded from the generic 350W PSU, not only did the reboot problems go away, but i was able to hit much higher stable o/c's at a LOWER VOLATAGES.

So if your PSU isnt powerful/stable enough, then you may well experience similar problems, as well as running the risk of your PSU catching fire if it is of a cheap build - its been known to happen when such PSUs are put under a heavier load than they can cope with.