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Ok another noob question but, I've got a spare PSU and I've finally have decided on a build I want and will a 520W PSU be enough to power the following

 

Gigabyte-EP45-UD3R

Intel Pentium Wolfdale E5200 2.5GHZ

Radeon 4830

2GB G skill ram

Seagate barracuda 640GB HDD

Some random IDE optical drive I have