Question / Help Losing fps if I start recording with NVENC new

[peter98]

Hi,

When I even only open OBS I have 2 frames less in game. Then I start recording and I lose more 4-5 fps. So I have 70 fps, when recording with OBS I get only 62-63.

I use NVENC new, the preview windows is disabled to not use any GPU usage. So I could't understand if this is normal or not. I heard that NVENC is not using any GPU usage, if preview windows is disabled in OBS, thats why I ask this here.

PC:
AMD Ryzen 5 1600
GTX 1050 ti
16GB ram

Every driver is up to date, bios is too.

I uploaded the logs here: https://obsproject.com/logs/aqinZKi9pqply3qR

Thank you,
P

 

[carlmmii]

NVENC has minimal impact on your normal GPU activities like gaming. However, OBS's normal compositing DOES always take GPU resources -- OBS has to handle all the graphical elements to create each frame (called frame rendering), regardless of whether you're displaying the preview or not... it has to come from somewhere, and that puts a load on your GPU. Even if you were using x264 encoding, all of this rendering occurs on the GPU.

After the rendering process, the frame gets sent to the encoder. If you're using the NVENC (new) encoder, then this is a direct path from VRAM to the NVENC encoder, which is the least impact to the system since it doesn't have to transfer over the PCIe bus. From there, there is no more impact to the GPU operation, as long as only the encoder silicon is being used. There are 3 options that do use CUDA functions (and thus will impact your overall GPU performance): Max Quality, Psycho Visual Tuning, and Look Ahead. You have two of those features enabled, which explains the extra hit to your game performance.