what I do not understand is why you believe that a "better" GPU would make any difference to my system's performance? Surely if my GPU wasn't fast enough to decode DXV then DXV wouldn't work at all?
Well, a better/faster GPU would be able decode faster. I have a comparable specced graphics card in my machine, and find it can get pretty worked up about 1080p content, let alone 4K. You're a knowledgeable guy though, so I'm sure you figured this as well.
Anyway I will likely try an SSD next week to see if it helps
There are many possible bottlenecks in a high end pipeline like this, and I tend to agree that disk access is probably the limiting one in your case.
(will have to buy it myself because the idiots i work for refuse to help)
They brought me another crappy PC too
Are you sure this job is worth it?