Dave. I'm pretty sure your cards can run DX12, obviously you need windows 10 and the latest graphics card drivers.

Lets take it as read that it runs and gets a nice score   

Data, your comment kind of goaded me into giving it a try.

However... Your link:

Quote from: Data on August 13, 2016, 18:13:06 PM
There is a new DirectX 12 demo benchmark test to download, if you want to.

3DMark Time Spy

3.8 GIG Download Here

was going to finally deliver the file ONE DAY later.

So I searched for a faster link:

http://www.oldergeeks.com/downloads/file.php?id=866

I actually got the link from the FutureMark website's list of mirrors. It's downloading now, and should be ready to use in ~10 minutes. Still "slow", but far faster than waiting a day.

Had some trouble with 3dMark. It says there's an update available, but it would not install. Tried several times, no love. Here's the results:

http://www.3dmark.com/3dm/14232324

As expected, terribly sad. The demo was so choppy it was painful to watch. It got down to less than 2FPS, and the 2 GPU benchmarks were not much better, as you can see. The CPU test started of slow, but acceptable, but then it, too, started to chop badly, going as low as 9FPS.

Your overall score is almost the same as mine Dave, it's your GPU's that are letting it down, the CPU score is good still, I think.

These demos are always tough to run, I'm not surprised they run a bit choppy.

Still it run the test and your rig can run DX12