I know not everyone is a hardware expert but I hope people realize that having the minimum requirements means that you'll get the program to turn on... not that you'll have the best experience. I think pimax put it at a 1070 for the minimum. I would encourage people to remember (correct me if I'm wrong here) that running the 8k headset would be the *similar to running an ultra wide 2k monitor and having the image upscale to 4k via the headset scaler?
To give you perspective, my system is a 6 core (i7-6850k) Intel CPU w/ 32gb of ram and a GTX 1080ti. I run a 2k monitor now with gsync and I pull SOMEWHERE between 80 and 130 frames in games like r6 siege (with 4k texture pack) and pubg on ultra at a given time when I look at randomly look at my fps count. When I put r6 siege to 4k rendering at ultra settings I sunk to 60-70 fps (which kinda worries me since I'm an 8kx backer)
My point is my system is realitively high end. As a user in vr you're going to want every frame you can get to make for an immersive experience. I'm hoping if you have a 1070 or below you will consider upgrading and to keep in mind you'll be essientially powering a 2k display, and not the 1080p most users run as their display. therfore, your computers performance while powering a 1080p display is not going to be a good bench mark of how your headset will perform. You'll need the hardware to sustain at least 90fps at 2k in order to make this work well.
Please correct me if I'm wrong and I'll edit accordingly
*thank you heliosurge for the pan and scan analogy mentioned later in the thread