Cheap graphics card that can handle multiple monitors (no gaming)

[Cromulent]

First of all, I won't be doing any gaming on this graphics card, but at the same time, I need the ability to run 3 or 4 monitors up to 4k resolution.

Since all I'll be doing is editing text documents and programming on the computer, I don't need a powerful GPU, but I'm not sure which I should go with. Having it work properly under Linux is a must.

As cheap as possible would be great.

 

[Cromulent]

PNY NVIDIA Quadro P600

Thanks for the suggestion. That looks good but thinking about it I could probably do with just the P400.