Video card to pair with i5-4670 for 4k

Cedric_8

Prominent
Mar 13, 2017
3
0
510
Current setup:
i5-4670 with sapphire radeon hd 7870 (old stuff, I know)

I was recently gifted a 4k dell monitor. I would like to use that along with my asus vg248qe 144hz.
I plan to use them both as a dual display setup and run games on the 1080p display only.

Which video card won't be bottleneck by my CPU and allows me to run 1 4k display and 1 display at 144hz seamlessly?