Recently I've noticed this happening on two games I've tested, PUBG and Shadows of Mordor. The game itself is running at a fine 60fps but OBS says it's anywhere between 15 to 58.5 and changes constantly. I've been trying to find a solution everywhere I look. I'm not sure if this helps but I'm also running dual monitors, I've heard of some issues with that so I felt it might have been necessary to mention.
Here are my PC specs:
CPU: i7-6700
GPU: Nvidia Geforce GTX 960
RAM: 16GB
OBS Settings
Video: http://imgur.com/6N5Hmp3
Output: http://imgur.com/qcHmd1O
Here are my PC specs:
CPU: i7-6700
GPU: Nvidia Geforce GTX 960
RAM: 16GB
OBS Settings
Video: http://imgur.com/6N5Hmp3
Output: http://imgur.com/qcHmd1O