I have a 2012 dell xps 8500 that i just recently upgraded from windows 8.1 - 10 and a 4k monitor... unfortunantly the nvidia gt 620 graphics card does not support 4k. Any ideas?
If you don't need 60 Hz for 4K (or your monitor only has HDMI), you can cheap out and get the $40 MSI GeForce GT 720 (http://www.newegg.com/Product/Product.aspx?Item=N82E16814127851). If 60 Hz is a must and you want to use DisplayPort, you can spring for a card like the R7 250X for $60 (http://www.newegg.com/Product/Product.aspx?Item=N82E16814127791).