So I upgraded my Win 8.1 to Win10 yesterday, now using Displayport, All turned out great transition wise..

Monitor – https://www.philips.com.hk/en/c-p/356M6QJAB_69/momentum-full-hd-lcd-display-with-ambiglow/specifications
Scanning Frequency – 30 – 83 kHz (H) / 50 – 76 Hz (V)
I used both Adaptive sync Apps
Vsync/Gsync back and forth testing..Pendulum Variable Min+Max & Windmill (55-60+Swings) to find my sweet spot.

SMOOTH as SILK 52FPS Up and Past 60FPS with MaxFPS of 75FPS,..I get shudder/stutter under 52FPS, and Tearing above 75FPS, so thats my new window, opposed to just 74-75hz always.
The overhead is nice, that if more demanding games bring me down into the low 50's,..from my target 70-75FPS, I'm happy with the results.

Yet to test my LG 29"Ultrawide 48?-75hz once my brother stops gaming later on...

GTX1070 (Still have my GTX970, pity about that...)