Ok... so about 5 days ago my computer wouldn't on! Like nothing so I went to some private store and some guy installed a new power supply, but now my computer keeps crashing and Im wondering is it because the power supply he gave me is bad? or is it a bigger problem and is this problem going to do further harm to my computer such as distroy my ram and make me buy a new power supply. Im going back on Saturday to see what the problem im just wondering, if it is the powersupply should I tell him to install a specific powersupply or something?? My comp is a P4 1.6ghz 512 ram ( my video card takes about 32 of it, so its 480) and im going to install a new 128mb video card so should i get an extra special powersupply?