Quick PSU question

[kmistry]

Hi there im building a new rig, and am wondering will i need a new PSU? I've had my current one for ages with my xp2200+, 512 ddr, 9800 pro, gigabyte ga7-vax and this is AGP. Its a non branded 550W one, so will it work, or does PCI-E need a different type of connector ? (never built a PCI-E computer before.....

Thanks in advance

PS: Hiper HPU-4M580 Type R 580W ATX2.2 <----is this a good PSU if i did have to buy one (im on budget )

 

[kmistry]

Thanks for the swift reply