I have a GTX 1070, 16GB and a 3,4GHz Threadripper. Using the 3rd Person Template with Lumen and Virtual Texturing enabled (without using the latter yet).
The blank project (ie empty screen) starts around 50 fps, the Sky level around 35-40 fps. If I draw in 3 or four of Quixels Nanite rocks, the framerate drops to about 10-15 fps.
I understand my GFX card isn’t the newest kid on the block, and an early access version will be unoptimized, but this makes me wonder about the minimum specs and where the final, optimized version will be in terms of performance.