RX 460 or 680 GTX?

So I have a pre-built PC I picked up cheap as an extra/guest rig and may use it for a stream rig at some point.

i5 - 7400

8GB DDR4

RX460 2GB

I noticed I have an old EVGA GTX 680 laying around. Is it worth swapping the 680 in (I have to switch PSU out as well with a bigger one I have laying around) or just leave the rx460 in it?