Originally posted by: supafly
Edit: "ALL-IN-WONDER X800 XT requires connection to your PC?s internal power supply for operation. A 300-watt power supply or greater is recommended to ensure normal system operation. A 350-watt power supply may be required in some fully-loaded PC systems where a number of other internal devices are installed."
It won't use the same connector as PCIe, just molex... so yeah the new PSU will be fine.