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What kind of power supply can my computer handle. I am going to be upgrading my graphics card and the one I currently have just wont cut it. I am looking for something between the wattages of 400 Watt to 530 Watt. I am not sure what my computer can handle.

Intel Pentium 4 2.66 GHZ with 512 KB L2 Cache
SeaGate 120 GB ATA Hard Drive
Radeon 9550 Graphics Card
250 Watt Standard ATX Power Supply
MSI 648 Max Motherboard
MD Titanium MD 8000 XL Computer
 

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First, today PSUs are very reasonable, so you should be able to afford most.

Computer stores I shop only carry 600w on up.

This is just an examples from CompUSA. I notice this page does list PSU less than 600w.

If you restrict the PSU to 600w, you get these on CompUSA.

You may be able to get better prices at places like NewEgg.

CAUTION - The important thing to remember is whatever PSU you get must have a main connector that will fit your motherboard. The PSU in my home system came with an adapter that would fit both standard ATX & the newer PCI Express motherboards.

I would suggest 600w which should cover any future needs. Also, operating a PSU in its mid-range will mean less strain and longer life.
 
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