[DJ_Izumi]

Really, a low profile GT 1030 could fit in there and boom, your 790 SFF is an HDMI 2.0a ready HEVC 4K decoding mean machine.

 Not the USFF model which the OP has.. that was my point. I really like these Dell machines, they are fully toolless (except the cpu fan), and they are more or less given away these days. 

I didn't catch the 'U' my bad.