xps 420 upgrade

[B1G5T33M3R]

I'm looking to upgrade the vid card. Can someone suggest a good upgrade?

 

[clutchc]

If you keep the stock power supply (I presume it is 300W - 350W), your best solution would be the GTX 750 Ti. Most (not all) do not require a 6 pin PCIe power cable. This is one of the fastest of them: http://www.newegg.com/Product/Product.aspx?Item=N82E16814487024

What CPU do you have? What resolution is your monitor? How much RAM?