Will I have enough power for my new system?

[Ronin3782]

C2D E6400, Gigabyte GA-945P-S3, X1950 XT, 2 GB DDR2 667.

I'm looking at the Apevia ATXB6KLW, 420 W. Will this be enough?

Any suggestions are appreciated.

 

[k2gremlin]

Read his PSU guide ^^^^^^^ lol