>>319142989
I have a 3600 and 1070 with a chinese usb 3 cable and it's working just fine for me. Windows might be doing something stupid. 
One problem I had was with star wars squadrons, it seems to be limited to 45 fps because it has reprojection forced on due to a bug in the engine. I got it to work at one point, but then it broke today. That's the only game I've had trouble with.