370w to 480w

[renu]

I have a ENERMAX Noisetaker Series 370W Power Supply but when I got my new video card a X800 XT my sytem would not boot than the fuse blew out.I put a new fuse in and used a radeon 9200 card and it worked no problem. So if i get a 480 watt would this solve my problem or should I go bigger?

system specs

AMD Athlon 64 3200+
CHAINTECH VNF3-250
120 gig harddrive
1 gig of ram
dvd burner
dvd drive
X800 XT