Building a new computer from used parts

Atham

Posts: 454   +0
Hey,

I am making my brother a new PC rig from used parts and a couple of new parts.

Here it goes:

CPU AMD Phenom II X4 955 Black Edition
Motherboard MSI 785GM E51
GPU 9800 GT - possibly some update in the future
PSU I am not sure what wattage I should consider.
HDD his current 80 GB one
RAM his current 1GB - possibly updating to ZEPPELIN 4GB KIT DDR3 1333MHZ Gold
Case Eurocase ML5425 Cardo
CPU Cooler Probably stock cooler. I was thinking about some slight OCing, moving the multiplier up a notch.
DVD Drive Current one

The big issue for me is the PSU.(if there are any other issues or some components should be changed, please let me know).
I don't know what should be the ideal PSU. Would a 450 to 500 watt be enough.

Thanks in advance
 
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