Ryzen bench brought out the urge so I thought I would put current pc through its paces...
Thought I would run passmark, its had an update and it now contains a dx12 test as well as a opencl test, both additions show amd in a stronger light I think.
This is my rig I built it best part of five years ago. The GPU has been swapped out last year for a 980 Ti as one of the pair of 7970's died. Extra SSD was added a couple of months ago.
The old girl is still going strong and fingers crossed she has a few more years in her as money is a bit tight. This was my first Intel build having been a die hard AMD guy for so many years. The Wife is using the Bulldozer FX8150 that tipped me over the edge to get Intel five years ago.
I think you are right, when I was running the pair of 7970's in crossfire they may have out performed the single 980 Ti I have now. In the real world playing games and such the 980 Ti is a fair bit better. Synthetic benchmarks have their uses but they are not the be all and end all of performance metrics. ASUS had a nice general benchmark, it's been a while since I have looked at it but it does attempts "real world" tests.