What power supply will fit a Dell Dimension 5150

You can use almost any standard ATX psu, you just don't want to exceed the length of the original by to much.
Look for something like the Antec EA430 , they have a 500 watt unit but it's overkill for anything you could add to the 5150.

Sorry to sound really stupid, but why is it overkill for the 5150?

Cheers

It's an older , not very power hungry machine, that will only accept single slot video cards that are't going to require the the extra juice that a 500w can provide.

So based on that what HD Graphics card would you recommend for a Dell Dimension 5150?

ATI 4670 or 4770

PC Power and Cooling make Power Supplies especially to replace Dells.

Yeah, they lack a switch, not something that needs to be worried about with an open backed Dell.

I have the same computer with the same question. I have a Sparkle GeForce NVIDIA physX technology 9800GT 1g PCIE video card that requires 400watt with required 12v 26a. Can I get a PSU that has dual 12v? For example, 12V1@18a, 12V2@15a? Will that be enough or does the 26a need to be on a single rail?

forgot to ask if the video card (Sparkle GeForce NVIDIA physX technology 9800GT 1g PCIE ) would even work on this computer.