The way this manifests itself is usually when you move the camera around your character or make sharp turns in a racing game. 
Examples:
Witcher 3: Park geralt somewhere in the woods and just rotate the camera and watch what the trees are doing, the edges of the leaves turn brown.  All other objects do the same thing, there's basically a ghosting edge around all sharp edged objects like buildings etc.
 
Firewatch:  Same basic idea, as you turn anything with a sharp edge now has a ghost like edge to it that goes away as soon as the motion stops
 
Project Cars: During the race, if you use the assisted line which is represented by green, yellow, and red arrows, everytime you take a sharp turn the left of said arrows turns brown.
 
Star Wars Battlefront:  Pretty much the same as Witcher 3 and Firewatch.
 
All games have a very slight flicker, almost like what you get when you watch a movie in 3d for the first time.  it's not terribly noticeable, you have to look for it, but it's there.
It just feels like the two cards aren't totally synched and that there is a tiny delay which is shows up when there's a lot of pixels to be moved such as panning around or doing tight turns in a racing game.  This is my first time using SLI, so if this is considered "normal" then I guess I will have to live with it.
 
System specs are in the signature.
Thanks!
 

I think you're seeing the refresh rate of your monitor.

Not seeing the problem here on my maxwell titan x's.

cyberdimensions
Yes I initially did a DDU complete clean install of the lastest drivers, but I have since gone back because those drivers messed with Tomb Raider causing freezes in the main menu and in the game.
 
My monitor is set to 165 Hz and I have tried it with V sync on and off.  Gsync is of course enabled.

Same thing happens to me using the latest driver. I went back to the previous driver and no issues with ROTTR. It seems to be a DX12 SLI issue with the latest driver as both ROTTR and Timespy benchmark runs with no issues with one gpu but once you go sli, both of them freeze. So annoying man. But anyway, no sli issues with 368.81. 
 
Edit: Just want to mention that I deleted both MSI AB and EVGA Precision OC, did a clean install using DDU, etc.