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#11
250W is rather weak. If you want to upgrade your video card without replacing the power supply, your best options would be either an ATI Radeon HD 5570 or Nvidia GeForce GT 240. If however you want to invest a better power supply (usually recommend about 500 - 550W for midrange machines http://www.newegg.com/Product/Produc...82E16817171038), then you can step up to something like a Radeon HD 4870 or 5770 or GeForce GTS 450 or GTX 560 Ti.