Yup, my scene is using, nanite, lumen, and latest reflection (hit) type, along with volume clouds, multiple lights, landscapes, etc. 6kx3k render.
It may be something with your scene? Switch the working scene to lumen lighting, if it works, it may just be the scene itself and something in it…UE render issues a a little trickier to debug than a standard (reliable) cpu render engine (arnold, prman,vray) lol. Yes, the video card may be helping, some of my scenes from 5.0 pano setup would not render with my home machine with rtx2080 super 8gig ram. I have not tested the same scenes on my home box using 5.1.1 and the pano plugin.