Please post a link to a clean log file. To make a clean log file, first restart OBS, then start your stream/recording for ~30 seconds and stop it again. Make sure you replicate any issues as best you can, which means having any games/apps open and captured, etc. When you're done select Help > Log Files > Upload Current Log File. Copy the URL and paste it here.
So whenever I turn game capture on I go from 500 to 22 stable...
15:06:46.610: CPU Name: Intel(R) Core(TM) i7-6700K CPU @ 4.00GHz
15:06:46.610: CPU Speed: 4008MHz
15:06:46.610: Physical Cores: 4, Logical Cores: 8
15:06:46.610: Physical Memory: 32639MB Total, 25626MB Free
15:06:46.610: Windows Version: 10.0 Build 14393 (revision: 1198; 64-bit)
15:06:46.610: Running as administrator: false
15:06:46.610: Aero is Enabled (Aero is always on for windows 8 and above)
15:06:46.610: Portable mode: false
15:06:46.617: OBS 18.0.1 (64bit, windows)
15:06:46.617: ---------------------------------
15:06:46.617: ---------------------------------
15:06:46.617: audio settings reset:
15:06:46.617: samples per sec: 44100
15:06:46.617: speakers: 2
15:06:46.628: ---------------------------------
15:06:46.628: Initializing D3D11..
15:06:46.628: Available Video Adapters:
15:06:46.629: Adapter 1: NVIDIA GeForce GTX 1060 6GB
15:06:46.629: Dedicated VRAM: 2084896768
15:06:46.629: Shared VRAM: 4227663872
15:06:46.629: output 1: pos={0, 0}, size={1920, 1080}, attached=true
15:06:46.629: Adapter 2: Intel(R) HD Graphics 530
15:06:46.629: Dedicated VRAM: 134217728
15:06:46.629: Shared VRAM: 4227663872
15:06:46.629: output 1: pos={1920, -7}, size={1920, 1080}, attached=true
15:06:46.630: Loading up D3D11 on adapter NVIDIA GeForce GTX 1060 6GB (0)
15:06:47.085: D3D11 loaded sucessfully, feature level used: 45056
15:06:47.721: ---------------------------------
15:06:47.721: video settings reset:
15:06:47.721: base resolution: 1920x1080
15:06:47.721: output resolution: 1920x1080
15:06:47.721: downscale filter: Bilinear
15:06:47.721: fps: 240/1
15:06:47.721: format: NV12
15:06:47.722: Audio monitoring device:
15:06:47.722: name: Default
15:06:47.722: id: default
15:06:47.722: ---------------------------------
15:06:47.797: Required module function 'obs_module_load' in module '../../obs-plugins/64bit/chrome_elf.dll' not found, loading of module failed
15:06:47.812: [CoreAudio encoder]: CoreAudio AAC encoder not installed on the system or couldn't be loaded
15:06:47.827: [AMF Encoder] Unable to load 'amfrt64.dll', error code 126.
15:06:47.931: Required module function 'obs_module_load' in module '../../obs-plugins/64bit/libcef.dll' not found, loading of module failed
15:06:47.940: Required module function 'obs_module_load' in module '../../obs-plugins/64bit/libEGL.dll' not found, loading of module failed
15:06:47.950: Required module function 'obs_module_load' in module '../../obs-plugins/64bit/libGLESv2.dll' not found, loading of module failed
15:06:47.962: Failed to load 'en-US' text for module: 'obs-browser.dll'
15:06:47.962: [browser_source: 'Version: 1.29.0']
15:06:48.007: NVENC supported
15:06:48.183: Couldn't find VLC installation, VLC video source disabled
15:06:48.215: No blackmagic support
15:06:48.513: ---------------------------------
15:06:48.513: Loaded Modules:
15:06:48.513: win-wasapi.dll
15:06:48.513: win-mf.dll
15:06:48.513: win-dshow.dll
15:06:48.513: win-decklink.dll
15:06:48.513: win-capture.dll
15:06:48.513: vlc-video.dll
15:06:48.513: text-freetype2.dll
15:06:48.513: rtmp-services.dll
15:06:48.513: obs-x264.dll
15:06:48.513: obs-vst.dll
15:06:48.513: obs-transitions.dll
15:06:48.513: obs-text.dll
15:06:48.513: obs-qsv11.dll
15:06:48.513: obs-outputs.dll
15:06:48.513: obs-filters.dll
15:06:48.513: obs-ffmpeg.dll
15:06:48.513: obs-browser.dll
15:06:48.513: image-source.dll
15:06:48.513: frontend-tools.dll
15:06:48.513: enc-amf.dll
15:06:48.513: coreaudio-encoder.dll
15:06:48.513: ==== Startup complete ===============================================
15:06:48.513: Service '' not found
15:06:48.516: All scene data cleared
15:06:48.516: ------------------------------------------------
15:06:48.552: WASAPI: Device 'Speakers (Logitech G35 Gaming Headset)' initialized
15:06:48.558: WASAPI: Device 'Microphone (Yeti Stereo Microphone)' initialized
15:06:48.600: adding 23 milliseconds of audio buffering, total audio buffering is now 23 milliseconds
15:06:53.814: Switched to scene 'Scene'
15:06:53.815: [game-capture: 'Game Capture'] attempting to hook process: ts3client_win64.exe
15:06:53.863: [game-capture: 'Game Capture'] using helper (compatibility hook)
15:06:53.865: [game-capture: 'Game Capture'] hook not loaded yet, retrying..
15:06:53.865: [game-capture: 'Game Capture 2'] attempting to hook process: javaw.exe
15:06:53.867: [game-capture: 'Game Capture 2'] using helper (compatibility hook)
15:06:53.868: [game-capture: 'Game Capture 2'] hook not loaded yet, retrying..
15:06:53.868: ------------------------------------------------
15:06:53.868: Loaded scenes:
15:06:53.868: - scene 'Scene':
15:06:53.868: - source: 'Game Capture' (game_capture)
15:06:53.869: - source: 'Game Capture 2' (game_capture)
15:06:53.869: ------------------------------------------------
15:06:53.870: CalculateFileHash: Failed to open file 'C:\Users\glyffe\AppData\Roaming\obs-studio\updates\manifest.json': 2
15:06:55.810: [game-capture: 'Game Capture'] attempting to hook process: ts3client_win64.exe
15:06:55.812: [game-capture: 'Game Capture 2'] attempting to hook process: javaw.exe
15:06:57.894: [game-capture: 'Game Capture'] capture stopped
15:06:57.897: [game-capture: 'Game Capture 2'] capture stopped
15:06:59.814: [game-capture: 'Game Capture'] attempting to hook process: ts3client_win64.exe
15:06:59.816: [game-capture: 'Game Capture 2'] attempting to hook process: javaw.exe
15:06:59.820: [game-capture: 'Game Capture'] capture stopped
15:06:59.821: [game-capture: 'Game Capture 2'] capture stopped
15:07:03.091: User Removed source 'Game Capture 2' (game_capture) from scene 'Scene'
15:07:03.822: [game-capture: 'Game Capture'] attempting to hook process: ts3client_win64.exe
15:07:03.837: [game-capture: 'Game Capture'] capture stopped
15:07:07.004: User Removed source 'Game Capture' (game_capture) from scene 'Scene'
15:07:09.222: rtmp-common.c: [initialize_output] Could not find service ''
15:07:09.223: rtmp-common.c: [initialize_output] Could not find service ''
15:07:09.274: rtmp-common.c: [initialize_output] Could not find service ''
15:07:10.870: rtmp-common.c: [initialize_output] Could not find service ''
15:07:13.377: rtmp-common.c: [initialize_output] Could not find service ''
15:07:16.058: rtmp-common.c: [initialize_output] Could not find service ''
15:07:16.705: rtmp-common.c: [initialize_output] Could not find service ''
15:07:17.867: rtmp-common.c: [initialize_output] Could not find service ''
15:07:43.596: Settings changed (outputs)
15:07:43.596: ------------------------------------------------
15:08:11.554: User added source 'Display Capture' (monitor_capture) to scene 'Scene'
15:08:24.052: rtmp-common.c: [initialize_output] Could not find service ''
15:08:24.052: ---------------------------------
15:08:24.052: [x264 encoder: 'recording_h264'] preset: veryfast
15:08:24.053: [x264 encoder: 'recording_h264'] settings:
15:08:24.053: rate_control: CBR
15:08:24.053: bitrate: 70000
15:08:24.053: buffer size: 70000
15:08:24.053: crf: 0
15:08:24.053: fps_num: 240
15:08:24.053: fps_den: 1
15:08:24.053: width: 1920
15:08:24.053: height: 1080
15:08:24.053: keyint: 250
15:08:24.053: vfr: off
15:08:24.053:
15:08:24.060: [Media Foundation AAC: 'Track1']: encoder created
15:08:24.060: bitrate: 160
15:08:24.060: channels: 2
15:08:24.060: sample rate: 44100
15:08:24.060: bits-per-sample: 16
15:08:24.060:
15:08:24.061: [Media Foundation AAC: 'Track2']: encoder created
15:08:24.061: bitrate: 160
15:08:24.061: channels: 2
15:08:24.061: sample rate: 44100
15:08:24.061: bits-per-sample: 16
15:08:24.061:
15:08:24.077: ==== Recording Start ===============================================
15:08:24.077: [ffmpeg muxer: 'adv_file_output'] Writing file 'C:/Users/glyffe/Videos/Arcane/2017-05-19 15-08-24.mp4'...
15:09:15.136: [ffmpeg muxer: 'adv_file_output'] Output of file 'C:/Users/glyffe/Videos/Arcane/2017-05-19 15-08-24.mp4' stopped
15:09:15.136: Output 'adv_file_output': stopping
15:09:15.136: Output 'adv_file_output': Total encoded frames: 8847
15:09:15.136: Output 'adv_file_output': Total drawn frames: 12254
15:09:15.136: Output 'adv_file_output': Number of skipped frames due to encoding lag: 12161 (137.5%)
15:09:15.136: Output 'adv_file_output': Number of lagged frames due to rendering lag/stalls: 176 (1.4%)
15:09:15.136: ==== Recording Stop ================================================
15:09:56.043: User Removed source 'Display Capture' (monitor_capture) from scene 'Scene'
15:09:57.717: rtmp-common.c: [initialize_output] Could not find service ''
15:09:57.718: rtmp-common.c: [initialize_output] Could not find service ''
15:09:57.760: rtmp-common.c: [initialize_output] Could not find service ''
15:11:08.163: rtmp-common.c: [initialize_output] Could not find service ''
15:11:08.667: rtmp-common.c: [initialize_output] Could not find service ''
15:11:09.651: rtmp-common.c: [initialize_output] Could not find service ''
15:11:10.475: rtmp-common.c: [initialize_output] Could not find service ''
15:11:11.780: rtmp-common.c: [initialize_output] Could not find service ''
15:11:25.797: Settings changed (outputs)
15:11:25.797: ------------------------------------------------
15:11:28.873: rtmp-common.c: [initialize_output] Could not find service ''
15:11:28.874: rtmp-common.c: [initialize_output] Could not find service ''
15:11:28.919: rtmp-common.c: [initialize_output] Could not find service ''
15:11:29.788: rtmp-common.c: [initialize_output] Could not find service ''
15:11:50.155: Settings changed (outputs)
15:11:50.156: ------------------------------------------------
15:12:50.110: User added source 'Game Capture' (game_capture) to scene 'Scene'
15:12:56.596: [game-capture: 'Game Capture'] attempting to hook process: javaw.exe
15:12:56.603: [game-capture: 'Game Capture'] shared texture capture successful
15:13:04.614: [game-capture: 'Game Capture'] capture stopped
15:13:04.816: [game-capture: 'Game Capture'] attempting to hook process: javaw.exe
15:13:04.831: [game-capture: 'Game Capture'] shared texture capture successful
15:13:11.769: [game-capture: 'Game Capture'] capture stopped
15:13:11.771: [game-capture: 'Game Capture'] attempting to hook process: javaw.exe
15:13:11.793: [game-capture: 'Game Capture'] gl memory capture successful
15:13:11.794: [game-capture: 'Game Capture'] memory capture successful
15:13:23.238: [game-capture: 'Game Capture'] capture stopped
15:13:23.239: [game-capture: 'Game Capture'] attempting to hook process: javaw.exe
15:13:23.253: [game-capture: 'Game Capture'] capture stopped
15:13:25.238: [game-capture: 'Game Capture'] attempting to hook process: javaw.exe
15:13:25.261: [game-capture: 'Game Capture'] memory capture successful
