Dimension 5100c

I have a Dell Dimension 5100c and i was wondering which graphics card i should get, because my power supply is very limited, it is a slimline pc.
I have no idea what type my power supply is, thats why i need help.
I am looking to do an (almost) whole system upgrade.

Cpu: Intel Pentium D 2.8 ghz (it says no hyperthreading, though its listed twice)

Ram:1gb

Gpu: Intel 945g

Os: Stock windows xp (reinstalled from media center ed, due to virus destroying my registry.)

Psu: I have no idea

Also, i want do do some light gaming (Diablo III, TF2, Portal 2, Breach)
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  1. A whole system upgrade? Build a new PC. The Pentium D is very poor these days, as is 1GB of RAM. If you want to keep this PC, get an HD 6450 (would be safe on your PSU no matter what) and upgrade to at least 2GB of RAM.
  2. Vettedude said:
    A whole system upgrade? Build a new PC. The Pentium D is very poor these days, as is 1GB of RAM. If you want to keep this PC, get an HD 6450 (would be safe on your PSU no matter what) and upgrade to at least 2GB of RAM.


    I am upgrading gfx, ram, and hopefully psu.

    how much would a light gaming pc run, preferrably with a gtx card?
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