Yes I understand how it worked but people here have been saying the link cable was bad compared to the VD method and well I finally got it working and i agree. I was getting the oculus camera bug via LINK and very juddery movement like screen tearing even with render scaled down to 40%. I used the tray tool to tune and it was ok.
With VD i have 80% scale with 50% LOD and it runs about 20fps on my 1070gtx. So i am happy for now but cant wait for a new video card when they are not about 2x Retail here.