is 500walt good for this type of pc?

[Smil3y]

Processor AMD Athlon 64 X2 Dual Core 5200+ Socket AM2
CPU Fan AMD Original AM2 CPU Fan
Motherboard ECS nVidia GeForce 7050M-M Motherboard
Memory 4GB DDR II 800 Memory 240 Pin (Kingston)
Hard Drive Western Digital 160GB 7200RPM 8MB Cache Serial ATA II
Optical Drive LG 22X DVD RW + Dual Layer
Video nVidia GeForce 9600GT 512MB DDR3 PCI-E Dual DVI HDTV
Audio Realtek ALC662 6-channel HD Audio
Network Card Onboard 10/100 Network Card
Ports 6 USB 2.0 Ports, 1 Parallel, 1 1394a