Thought I'd post this even though I use the AMD utility which is very good. I run an AMD480 8 gig GPU and have an intel I7 CPU with 32 gig of ram. My "monitors" are a 50" 4K TV and a 28" wide view monitor (1080P). I could never get the Vegas SC to work, just the black square. However, I wanted to access some features on the 28" monitor that did not work with the AMD card, so I switched it to the motherboard DVI video output. Then after a couple of months went by on a lark I tried Vegas Capture again, it worked perfectly in that setup with 28" while the 50" out of the AMD work fine with the AMD utility. I do some Zoom presentations with a photography group and now I can capture both screen simultaneously. So if you have more than one monitor and Vegas capture doesn't work , try hooking one monitor up to your mother board and see if that works.

I prefer the AMD utility but this work around for Vegas Capture has given me one more tool in my kit.