Power Requirements Question

First off the computer has:

AMD Athlon 64 3000+
geforce fx5700gt
An asus mobo (not sure of the model)
2x 80gb Hard drives
CD-R drive
DVD drive
Floppy disk drive


I am replacing a 480W power supply in this computer that died. I have a 400W Antec laying around unused, and am trying to determine if it will work in this system. It seems like it will, but this computer is also used to occasionally charge an mp3 player.

Will 400W run this system without a problem? Or am I better off buying a new psu. Thanks for any input in advance.

 

yeah a 400W Antec should be fine, I only run a 430W with my rig in my signature

 

I would agree with viper_boy403,that the Antec would be good.
If you want to calculate your power supply needs
http://www.journeysystems.com/?powercalc