A. OBS is running on an Intel iGPU. This hardware is
generally not powerful enough to be used for both gaming and running OBS. Yes, I know it's a '22 processor/GPU running RuneScape.
B. Your system is below minimum specs for OBS to run but it should be able to.
1. OBS is not running as Administrator. Because of this, OBS will not be able to Game Capture certain games (you're using Window Capture for a game), and it will not be able to request a higher GPU priority for itself -- which is the likely the cause of the 33.5% render lag you experienced. Run OBS as Administrator to help alleviate this problem.
2. Your GPU is maxed out and OBS can't render scenes fast enough. Running a game without vertical sync or a frame rate limiter will frequently cause performance issues with OBS because your GPU will be maxed out. OBS requires a little GPU to render your scene.
Enable Vsync or set a reasonable frame rate limit (60, 30) that your GPU can handle without hitting 100% usage.
If that's not enough you may also need to turn down some of the video quality options in the game. If you are experiencing issues in general while using OBS, your GPU may be overloaded for the settings you are trying to use.
Please check our guide for ideas why this may be happening, and steps you can take to correct it:
GPU Overload Issues.
3. Close all other unnecessary programs when recording.
