There haven't been any put out by VR. The only solution is to try.
My personal experience when getting into PA back in Jan was that my 10 yr. old graphics card only supported DirectX 10, and it seems DirectX 11 is the minimum needed.
Beyond that, it's really not hard to install and try.
There is no real baseline at the moment. I'd just give it a shot on Saturday and hope it works.
My personally recommendation would be a graphics card with 4 or more gb of memory and a pc with 16gb of memory or more just to play on minimum settings. There is nothing official though.