You should be fine, I've been running stable for two years with a Tagan 480W powering an A64 3700+, Asus A8N-SLI Deluxe, two HDDs, one ODD, 6800GT, 2x512MB RAM
The PSU looks to have the same compatibility (20+4pin ATX connector), PCI Express and SATA connectors, nice at $49.99