I have a rig made specifically for even being able to game and record "lossless" in 4k with DXTORY. As of late, some games are refusing to record correctly. Even really simple Unity-based games. It would appear quite a few things apparently somehow "lock" at 45fps recording almost exactly. Even if the game is running at 60fps or higher. Of course I could use "synchronous surface lock" for example but then the output isn't exactly a smooth 60fps even if it records as that. What's been going on recently?
EDIT:
Can confirm DXTORY is causing the problem, something is causing it to capture at about 75% the target fps. Locking the games to 90fps rather than 60fps lets me record 60fps it would seem....
Have you tried using only "Multi Device Processing" under Advanced ? If that doesn't help you can try Force CPU processing and see what that does. Those two settings usually have an effect with that problem.