New PSU for HP m8400f upgrades?

The original CPU and motherboard on my HP m8400f died recently so I ordered replacements for each:

GIGABYTE GA-MA785GM-US2H AM3/AM2+/AM2 AMD 785G HDMI Micro ATX AMD Motherboard [...] 6813128394

AMD Phenom II X2 550 Black Edition Callisto 3.1GHz 2 x 512KB L2 Cache 6MB L3 Cache Socket AM3 80W Dual-Core Processor [...] 6819103680

The original m8400f PSU is rated at 380w...will that be enough? If not, I would appreciate suggestions and links to recommended replacements...the board's instruction manual calls for no less than a 500w PSU "for expansion purposes", but I plan on only using the original m8400f components, if possible. Thanks in advance for your help.
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  1. Best answer
    You'll have no problems with the original 380w HP power supply to run your system. It's only if you want to add a discrete graphic card that you'd need to install a more powerful PSU. There's even some graphic cards that would be just fine with the 380w such as the ATI HD4670 and others.

    *EDIT* if your system has the GeForce 8500GT graphic card installed the 380w is plenty of power for that also.
  2. I'm apparently okay with the stock PSU for now. Thanks!
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