Question / Help Dropped Frames As soon As I Click in game

[Jaromie]

whether im recording or not as soon as i tab in game from OBS my FPS drops about 20 frames in my preview screen.
no clue why i have a i7 8700k and the CPU usage is 5-10%
GPU: GTX 1080 8gb
16gb Ram
ive disabled windows game mode and the problem still persist. can someone help me? im just trying to record in 60fps. i hjave vsync enabled in game also.

heres link to log file: https://gist.github.com/c65d6a25f96bb962dcd4f52883e36e05

 

[BornDownUnder]

I'm not entirely sure your 1080 could handle doing 2560x1440 @60fps, with a webcam source running at 1080p30fps using the h264 encoder. You will have to test a bit.

Try using CQP rate control with a value of 15 to 23, instead of CBR. This will free the encoder of bitrate restriction, which will produce a better image quality overall.
You should also use game capture as monitor capture forces the use of system RAM (To eliminate compatibility issues) to grab the frame, which is very slow in comparison to grabbing the frame from the video card as is the method used by game/window capture.
Try dropping the resolution of your webcam source to 1280x720, keeping the 30fps limiter on it. This will reduce resource usage.
Disabling the Preview Window in OBS will also help a little in resource usage.

You could try using x264 encoder, this will push most of the usage onto your CPU though I have no idea how it would perform at 2560x1440@60fps.
Using the x264 encoder, use CRF rate control method, with a CRF factor of 15-23. CRF is basically exactly the same as CQP is for NVENC h264 encoder.
Not sure you will be able to veryfast or slower presets, try at veryfast first off though I think it will be superfast/ultrafast at the resolution and fps value.