Hi, I'm having the same issues - however though i had a good run for 2 days and now its back to the same issues with low FPS.
Here is my recent log.
12:12:22.562: CPU Name: AMD Ryzen 5 5600X 6-Core Processor
12:12:22.562: CPU Speed: 3693MHz
12:12:22.562: Physical Cores: 6, Logical Cores: 12
12:12:22.562: Physical Memory: 32674MB Total, 27954MB Free
12:12:22.562: Windows Version: 10.0 Build 19044 (release: 2009; revision: 1526; 64-bit)
12:12:22.562: Running as administrator: true
12:12:22.562: Aero is Enabled (Aero is always on for windows 8 and above)
12:12:22.562: Windows 10 Gaming Features:
12:12:22.562: Game DVR: On
12:12:22.563: Sec. Software Status:
12:12:22.564: Norton Security: enabled (AV)
12:12:22.564: Microsoft Defender Antivirus: disabled (AV)
12:12:22.564: Norton Security: enabled (FW)
12:12:22.564: Windows Firewall: disabled (FW)
12:12:22.564: Current Date/Time: 2022-02-20, 12:12:22
12:12:22.564: Browser Hardware Acceleration: true
12:12:22.564: Portable mode: false
12:12:22.685: OBS 27.1.3 (64-bit, windows)
12:12:22.685: ---------------------------------
12:12:22.692: ---------------------------------
12:12:22.692: audio settings reset:
12:12:22.692: samples per sec: 48000
12:12:22.692: speakers: 2
12:12:22.694: ---------------------------------
12:12:22.694: Initializing D3D11...
12:12:22.694: Available Video Adapters:
12:12:22.696: Adapter 0: AMD Radeon RX 6900 XT
12:12:22.696: Dedicated VRAM: 4247334912
12:12:22.696: Shared VRAM: 4245895168
12:12:22.696: PCI ID: 1002:73af
12:12:22.696: Driver Version: 30.0.13023.4001
12:12:22.696: output 0: pos={0, 0}, size={2560, 1080}, attached=true, refresh=144, name=LG ULTRAGEAR
12:12:22.696: output 1: pos={2560, -836}, size={1080, 1920}, attached=true, refresh=59, name=S27A950D
12:12:22.698: Loading up D3D11 on adapter AMD Radeon RX 6900 XT (0)
12:12:22.719: D3D11 loaded successfully, feature level used: b000
12:12:22.719: DXGI increase maximum frame latency success
12:12:22.719: D3D11 GPU priority setup success
12:12:23.007: ---------------------------------
12:12:23.007: video settings reset:
12:12:23.007: base resolution: 1920x1080
12:12:23.007: output resolution: 1280x720
12:12:23.007: downscale filter: Bicubic
12:12:23.007: fps: 30/1
12:12:23.007: format: NV12
12:12:23.007: YUV mode: 709/Partial
12:12:23.007: NV12 texture support enabled
12:12:23.009: Audio monitoring device:
12:12:23.009: name: Default
12:12:23.009: id: default
12:12:23.009: ---------------------------------
12:12:23.010: Skipping module '../../obs-plugins/64bit/chrome_elf.dll', not an OBS plugin
12:12:23.013: [CoreAudio encoder]: CoreAudio AAC encoder not installed on the system or couldn't be loaded
12:12:23.014: Failed to load 'en-US' text for module: 'decklink-captions.dll'
12:12:23.015: Failed to load 'en-US' text for module: 'decklink-ouput-ui.dll'
12:12:23.219: [AMF] Version 2.7.0 loaded (Compiled: 1.4.14.0, Runtime: 1.4.22.0, Library: 1;4;22;0;21.30.23.01;202110182146;CL#2368610).
12:12:23.246: [AMF] <Id: 1> Unable to set converter transfer characteristic, error AMF_NOT_FOUND (code 11)
12:12:23.281: [AMF] <Id: 2> Unable to set converter transfer characteristic, error AMF_NOT_FOUND (code 11)
12:12:23.285: [AMF] [Capability Manager] Testing Direct3D 11 Adapter 'AMD Radeon RX 6900 XT (VEN_1002/DEV_73af/SUB_4fc1043/REV_00c0)':
12:12:23.285: H264/AVC: Supported
12:12:23.285: H265/HEVC: Supported
12:12:23.285:
12:12:23.291: Skipping module '../../obs-plugins/64bit/libcef.dll', not an OBS plugin
12:12:23.296: Skipping module '../../obs-plugins/64bit/libEGL.dll', not an OBS plugin
12:12:23.297: Skipping module '../../obs-plugins/64bit/libGLESv2.dll', not an OBS plugin
12:12:23.301: [obs-browser]: Version 2.16.3
12:12:23.301: [obs-browser]: CEF Version 75.1.16+g16a67c4+chromium-75.0.3770.100
12:12:23.305: [noise suppress]: NVIDIA RTX denoiser disabled, redistributable not found
12:12:23.745: VLC found, VLC video source enabled
12:12:23.752: A DeckLink iterator could not be created. The DeckLink drivers may not be installed
12:12:23.753: No blackmagic support
12:12:23.756: ---------------------------------
12:12:23.757: Loaded Modules:
12:12:23.757: win-wasapi.dll
12:12:23.757: win-mf.dll
12:12:23.757: win-dshow.dll
12:12:23.757: win-decklink.dll
12:12:23.757: win-capture.dll
12:12:23.757: vlc-video.dll
12:12:23.757: text-freetype2.dll
12:12:23.757: rtmp-services.dll
12:12:23.757: obs-x264.dll
12:12:23.757: obs-vst.dll
12:12:23.757: obs-transitions.dll
12:12:23.757: obs-text.dll
12:12:23.757: obs-qsv11.dll
12:12:23.757: obs-outputs.dll
12:12:23.757: obs-filters.dll
12:12:23.757: obs-ffmpeg.dll
12:12:23.757: obs-browser.dll
12:12:23.757: image-source.dll
12:12:23.757: frontend-tools.dll
12:12:23.757: enc-amf.dll
12:12:23.757: decklink-ouput-ui.dll
12:12:23.757: decklink-captions.dll
12:12:23.757: coreaudio-encoder.dll
12:12:23.757: ---------------------------------
12:12:23.757: ==== Startup complete ===============================================
12:12:23.761: No scene file found, creating default scene
12:12:23.761: All scene data cleared
12:12:23.761: ------------------------------------------------
12:12:23.782: WASAPI: Device 'Speakers (G560 Gaming Speaker Stereo)' [44100 Hz] initialized
12:12:23.809: WASAPI: Device 'Microphone (Logitech PRO X Wireless Gaming Headset)' [48000 Hz] initialized
12:12:23.809: Switched to scene 'Scene'
12:12:23.809: Failed to glob scene collections
12:12:23.849: adding 42 milliseconds of audio buffering, total audio buffering is now 42 milliseconds (source: Mic/Aux)
12:12:23.849:
12:12:25.206: [rtmp-services plugin] Successfully updated file 'services.json' (version 188)
12:12:25.206: [rtmp-services plugin] Successfully updated package (version 188)
12:12:40.436:
12:12:40.436: ==== Auto-config wizard testing commencing ======
12:12:43.111: ---------------------------------
12:12:43.111: video settings reset:
12:12:43.111: base resolution: 1920x1080
12:12:43.111: output resolution: 1920x1080
12:12:43.111: downscale filter: Bicubic
12:12:43.111: fps: 60/1
12:12:43.111: format: NV12
12:12:43.111: YUV mode: 709/Partial
12:12:43.111: NV12 texture support enabled
12:12:43.122:
12:12:43.122: ==== Auto-config wizard testing stopping ========
12:13:03.618: WASAPI: Device 'Speakers (G560 Gaming Speaker Stereo)' Terminated
12:13:03.629: WASAPI: Device 'Speakers (G560 Gaming Speaker Stereo)' [44100 Hz] initialized
12:13:03.707: WASAPI: Device 'Speakers (Logitech PRO X Wireless Gaming Headset)' [44100 Hz] initialized
12:13:03.707: WASAPI: Device 'Microphone (Logitech PRO X Wireless Gaming Headset)' Terminated
12:13:03.724: WASAPI: Device 'Microphone (Logitech PRO X Wireless Gaming Headset)' [48000 Hz] initialized
12:13:03.727: Settings changed (general, audio)
12:13:03.727: ------------------------------------------------
12:13:20.786: Settings changed (outputs)
12:13:20.786: ------------------------------------------------
12:13:33.547: [AMF] <Id: 3> Unable to set converter transfer characteristic, error AMF_NOT_FOUND (code 11)
12:13:33.578: [AMF] <Id: 4> Unable to set converter transfer characteristic, error AMF_NOT_FOUND (code 11)
12:13:33.611: [AMF] <Id: 5> Unable to set converter transfer characteristic, error AMF_NOT_FOUND (code 11)
12:13:33.642: [AMF] <Id: 6> Unable to set converter transfer characteristic, error AMF_NOT_FOUND (code 11)
12:13:43.171: Settings changed (outputs)
12:13:43.171: ------------------------------------------------
12:13:56.353: ---------------------------------
12:13:56.353: video settings reset:
12:13:56.353: base resolution: 1920x1080
12:13:56.353: output resolution: 1920x1080
12:13:56.353: downscale filter: Bicubic
12:13:56.353: fps: 60/1
12:13:56.353: format: NV12
12:13:56.353: YUV mode: 709/Partial
12:13:56.353: NV12 texture support enabled
12:13:56.369: Settings changed (hotkeys, advanced)
12:13:56.369: ------------------------------------------------
12:14:21.507: User added source 'Forza 5' (game_capture) to scene 'Scene'
12:14:31.329: WASAPI: Device 'Speakers (G560 Gaming Speaker Stereo)' [44100 Hz] initialized
12:14:31.331: User added source 'Audio Output Capture' (wasapi_output_capture) to scene 'Scene'
12:14:34.816: WASAPI: Device 'Speakers (G560 Gaming Speaker Stereo)' Terminated
12:14:34.828: WASAPI: Device 'Speakers (G560 Gaming Speaker Stereo)' [44100 Hz] initialized
12:14:52.475: [game-capture: 'Forza 5'] attempting to hook process: ForzaHorizon5.exe
12:14:52.478: [game-capture: 'Forza 5'] using helper (compatibility hook)
12:14:52.502: [game-capture: 'Forza 5'] hook not loaded yet, retrying..
12:14:54.491: [game-capture: 'Forza 5'] attempting to hook process: ForzaHorizon5.exe
12:14:54.532: [game-capture: 'Forza 5'] d3d12_init: device=0x2864D171CF0
12:14:54.532: [game-capture: 'Forza 5'] We're DXGI1.4 boys!
12:14:54.532: [game-capture: 'Forza 5'] Buffer count: 2, swap effect: 4
12:14:54.533: [game-capture: 'Forza 5'] d3d12_init_11on12: creating 11 device: queue=0x2864DC197B0
12:14:54.555: [game-capture: 'Forza 5'] d3d12 shared texture capture successful
12:14:54.556: [game-capture: 'Forza 5'] Remembering D3D12 queue from present: queue=0x2864DC197B0
12:14:54.557: [game-capture: 'Forza 5'] shared texture capture successful
12:14:57.035: [game-capture: 'Forza 5'] ----------------- d3d12 capture freed ----------------
12:14:57.100: [game-capture: 'Forza 5'] Found D3D12 device on swap chain: swap=0x28690F8C990, device=0x2864D171CF0
12:14:57.101: [game-capture: 'Forza 5'] Remembering D3D12 queue from present: queue=0x2864DC197B0
12:14:57.102: [game-capture: 'Forza 5'] Found D3D12 device on swap chain: swap=0x28690F8C990, device=0x2864D171CF0
12:14:57.102: [game-capture: 'Forza 5'] queue=0x2864DC197B0
12:14:57.102: [game-capture: 'Forza 5'] d3d12_init: device=0x2864D171CF0
12:14:57.102: [game-capture: 'Forza 5'] We're DXGI1.4 boys!
12:14:57.102: [game-capture: 'Forza 5'] Buffer count: 2, swap effect: 4
12:14:57.102: [game-capture: 'Forza 5'] d3d12_init_11on12: creating 11 device: queue=0x2864DC197B0
12:14:57.124: [game-capture: 'Forza 5'] d3d12 shared texture capture successful
12:14:57.124: [game-capture: 'Forza 5'] shared texture capture successful
12:14:57.126: [game-capture: 'Forza 5'] Remembering D3D12 queue from present: queue=0x2864DC197B0
12:16:22.731: [AMF] <Id: 7> Unable to set converter transfer characteristic, error AMF_NOT_FOUND (code 11)
12:16:22.770: [AMF] <Id: 8> Unable to set converter transfer characteristic, error AMF_NOT_FOUND (code 11)
12:16:32.597: Settings changed (outputs)
12:16:32.597: ------------------------------------------------
12:17:06.129: [AMF] <Id: 9> Unable to set converter transfer characteristic, error AMF_NOT_FOUND (code 11)
12:17:06.173: [AMF] <Id: 10> Unable to set converter transfer characteristic, error AMF_NOT_FOUND (code 11)
12:17:18.554: Settings changed (outputs)
12:17:18.554: ------------------------------------------------
12:18:40.290: [AMF] <Id: 11> Unable to set converter transfer characteristic, error AMF_NOT_FOUND (code 11)
12:18:40.333: [AMF] <Id: 12> Unable to set converter transfer characteristic, error AMF_NOT_FOUND (code 11)
12:18:46.891: [AMF] <Id: 13> Unable to set converter transfer characteristic, error AMF_NOT_FOUND (code 11)
12:18:46.941: [AMF] <Id: 14> Unable to set converter transfer characteristic, error AMF_NOT_FOUND (code 11)
12:18:46.988: [AMF] <Id: 15> Unable to set converter transfer characteristic, error AMF_NOT_FOUND (code 11)
12:18:47.031: [AMF] <Id: 16> Unable to set converter transfer characteristic, error AMF_NOT_FOUND (code 11)
12:18:52.981: Settings changed (outputs)
12:18:52.981: ------------------------------------------------
12:19:15.036: [AMF] <Id: 17> Unable to set converter transfer characteristic, error AMF_NOT_FOUND (code 11)
12:19:15.075: [AMF] <Id: 18> Unable to set converter transfer characteristic, error AMF_NOT_FOUND (code 11)
12:19:15.147: [AMF] <Id: 19> Unable to set converter transfer characteristic, error AMF_NOT_FOUND (code 11)
12:19:15.192: [AMF] <Id: 20> Unable to set converter transfer characteristic, error AMF_NOT_FOUND (code 11)
12:19:26.791: ---------------------------------
12:19:26.791: video settings reset:
12:19:26.791: base resolution: 1920x1080
12:19:26.791: output resolution: 1536x864
12:19:26.791: downscale filter: Lanczos
12:19:26.791: fps: 60/1
12:19:26.791: format: NV12
12:19:26.791: YUV mode: 709/Partial
12:19:26.792: NV12 texture support enabled
12:19:26.809: Settings changed (video)
12:19:26.809: ------------------------------------------------