Well it just powers your system. The wall outlet puts out AC current, while computers need DC current the power supply converts the AC current into usable DC current. Problems can arise if the PSU is of bad quality and dies. There is a chance that along with it going the PSU could also take other more expensive components with it. If you don't change the computer at all you should be fine (changing it may void a warranty if there is one this is the reason for not changing it). But if you ever want to make changed, do replace the PSU.
April 22, 2012 6:41:25 AM
can you explain what will the PSU do if I upgrade it?
I think i can get 700 whats but Im not a tech pro so I'm unsure
it isn't the quantity but the QUALITY of a PSU.
a 700 watt POS PSU can fail at 500 watts where as a 450 watts can handle an overload of 500 watts.
i would like to suggest if you are locked into getting it. get it with the lower PSU so its cheaper. than get a better quality PSU ASAP.
Well since I don't know the exact model/specs of the PSU in the computer I can't say for sure about the efficiency. But it will most likely be better for either of the PSU I linked, I doubt the one in the computer is 80+ rated at all.