Hello everyone. I'm sorry for my bad english, but I really need help.
I use OBS for about a year. It worked perfectly, and I've never had any problems. But they started a few days ago.
No matter which settings I use, with OBS my GPU is always loaded at 90% or so (default settings):

However CPU usage is quite low. I've just installed Windows 8.1, and my hardware configuration didn't change. If you have any ideas about what might be causing this, I would greatly appreciate it if you could share. Thanks.
I use OBS for about a year. It worked perfectly, and I've never had any problems. But they started a few days ago.
No matter which settings I use, with OBS my GPU is always loaded at 90% or so (default settings):

However CPU usage is quite low. I've just installed Windows 8.1, and my hardware configuration didn't change. If you have any ideas about what might be causing this, I would greatly appreciate it if you could share. Thanks.
Code:
10:11:15: Open Broadcaster Software v0.625b - 64bit ( ^ω^)
10:11:15: -------------------------------
10:11:15: CPU Name: Intel(R) Core(TM) i5-2400 CPU @ 3.10GHz
10:11:15: CPU Speed: 3093MHz
10:11:15: Physical Memory: 8175MB Total, 4468MB Free
10:11:15: stepping id: 7, model 42, family 6, type 0, extmodel 1, extfamily 0, HTT 1, logical cores 4, total cores 4
10:11:15: monitor 1: pos={0, 0}, size={1920, 1080}
10:11:15: Windows Version: 6.2 Build 9200
10:11:15: Aero is Enabled
10:11:15: -------------------------------
10:11:15: OBS Modules:
10:11:15: Base Address Module
10:11:15: 0000000079080000 OBS.exe
10:11:15: 00000000BBFE0000 OBSApi.dll
10:11:15: 00000000C61C0000 DShowPlugin.dll
10:11:15: 00000000C8D80000 GraphicsCapture.dll
10:11:15: 00000000C8B00000 NoiseGate.dll
10:11:15: 00000000C6160000 PSVPlugin.dll
10:11:15: ------------------------------------------
10:11:15: Adapter 1
10:11:15: Video Adapter: AMD Radeon HD 5700 Series
10:11:15: Video Adapter Dedicated Video Memory: 1063071744
10:11:15: Video Adapter Shared System Memory: 4026531840
10:11:15: Video Adapter Output 1: pos={0, 0}, size={1920, 1080}, attached=true
10:11:15: =====Stream Start: 2014-08-06, 10:11:15===============================================
10:11:15: Multithreaded optimizations: On
10:11:15: Base resolution: 1920x1080
10:11:15: Output resolution: 1920x1080
10:11:15: ------------------------------------------
10:11:15: Loading up D3D10 on AMD Radeon HD 5700 Series (Adapter 1)...
10:11:15: ------------------------------------------
10:11:15: Audio Format: 48000 Hz
10:11:15: ------------------------------------------
10:11:15: Audio Channels: 2 Ch
10:11:15: Playback device Default
10:11:15: ------------------------------------------
10:11:15: Using desktop audio input: Speakers (USB Audio Device)
10:11:15: Global Audio time adjust: 0
10:11:15: ------------------------------------------
10:11:15: Using auxilary audio input: Lexicon Alpha In/Out (USB Audio Device)
10:11:15: Mic time offset: 0
10:11:15: ------------------------------------------
10:11:15: Audio Encoding: AAC
10:11:15: bitrate: 128
10:11:15: Using bitmap image
10:11:15: Scene buffering time set to 700
10:11:15: ------------------------------------------
10:11:15: Video Encoding: x264
10:11:15: fps: 30
10:11:15: width: 1920, height: 1080
10:11:15: preset: veryfast
10:11:15: profile: high
10:11:15: keyint: 250
10:11:15: CBR: yes
10:11:15: CFR: yes
10:11:15: max bitrate: 2500
10:11:15: buffer size: 2500
10:11:15: ------------------------------------------
10:11:49: Total frames encoded: 1009, total frames duplicated: 0 (0.00%)
10:11:49: Total frames rendered: 1028, number of late frames: 1 (0.10%) (it's okay for some frames to be late)
10:11:49:
10:11:49: Profiler time results:
10:11:49:
10:11:49: ==============================================================
10:11:49: video thread frame - [100%] [avg time: 0.926 ms] [children: 20.7%] [unaccounted: 79.3%]
10:11:49: | scene->Preprocess - [0.108%] [avg time: 0.001 ms]
10:11:49: | GPU download and conversion - [20.6%] [avg time: 0.191 ms] [children: 19.2%] [unaccounted: 1.4%]
10:11:49: | | flush - [17.9%] [avg time: 0.166 ms]
10:11:49: | | CopyResource - [1.08%] [avg time: 0.01 ms]
10:11:49: | | conversion to 4:2:0 - [0.216%] [avg time: 0.002 ms]
10:11:49: Convert444Threads - [100%] [avg time: 0.909 ms] [children: 99.4%] [unaccounted: 0.55%]
10:11:49: | Convert444toNV12 - [99.4%] [avg time: 0.904 ms]
10:11:49: encoder thread frame - [100%] [avg time: 1.954 ms] [children: 0.154%] [unaccounted: 99.8%]
10:11:49: | sending stuff out - [0.154%] [avg time: 0.003 ms]
10:11:49: ==============================================================
10:11:49:
10:11:49:
10:11:49: Profiler CPU results:
10:11:49:
10:11:49: ==============================================================
10:11:49: video thread frame - [cpu time: avg 0.03 ms, total 31.25 ms] [avg calls per frame: 1]
10:11:49: | scene->Preprocess - [cpu time: avg 0 ms, total 0 ms] [avg calls per frame: 1]
10:11:49: | GPU download and conversion - [cpu time: avg 0 ms, total 0 ms] [avg calls per frame: 1]
10:11:49: | | flush - [cpu time: avg 0 ms, total 0 ms] [avg calls per frame: 1]
10:11:49: | | CopyResource - [cpu time: avg 0 ms, total 0 ms] [avg calls per frame: 1]
10:11:49: | | conversion to 4:2:0 - [cpu time: avg 0 ms, total 0 ms] [avg calls per frame: 1]
10:11:49: Convert444Threads - [cpu time: avg 0.783 ms, total 1578.13 ms] [avg calls per frame: 2]
10:11:49: | Convert444toNV12 - [cpu time: avg 0.783 ms, total 1578.13 ms] [avg calls per frame: 2]
10:11:49: encoder thread frame - [cpu time: avg 1.258 ms, total 1265.63 ms] [avg calls per frame: 1]
10:11:49: | sending stuff out - [cpu time: avg 0 ms, total 0 ms] [avg calls per frame: 1]
10:11:49: ==============================================================
10:11:49:
10:11:49: =====Stream End: 2014-08-06, 10:11:49=================================================
Last game capture log:
2014-08-05, 11:46:33: we're booting up:
11:46:33: CaptureThread: attached to process League of Legends.exe
11:46:33: D3D9 Present
11:46:33: DXGI Present
11:46:33: D3D9EndScene called
11:46:33: D3DPRESENT_PARAMETERS {
11:46:33: BackBufferWidth: 1920
11:46:33: BackBufferHeight: 1080
11:46:33: BackBufferFormat: D3DFMT_X8R8G8B8
11:46:33: BackBufferCount: 1
11:46:33: MultiSampleType: D3DMULTISAMPLE_NONE
11:46:33: MultiSampleQuality: 0
11:46:33: SwapEffect: D3DSWAPEFFECT_DISCARD
11:46:33: hDeviceWindow: 132266
11:46:33: Windowed: false
11:46:33: EnableAutoDepthStencil: true
11:46:33: AutoDepthStencilFormat: D3DFMT_D24S8
11:46:33: Flags: D3DPRESENTFLAG_DISCARD_DEPTHSTENCIL
11:46:33: FullScreen_RefreshRateInHz: 60
11:46:33: PresentationInterval: 0
11:46:33: };
11:46:33: successfully set up d3d9 hooks
11:46:33: D3D9Present called
11:46:33: DoD3D9CPUHook: success
11:46:33: NV Capture available
11:46:33: FBO available
11:46:33: GL Present
11:46:33: (half life scientist) everything.. seems to be in order
11:46:40: D3D9Reset called
11:46:40: ---------------------- Cleared D3D9 Capture ----------------------
11:46:40: successfully set up d3d9 hooks
11:46:40: D3D9EndScene called
11:46:40: D3D9Present called
11:46:40: DoD3D9CPUHook: success
11:46:41: successfully capturing d3d9 frames via CPU
11:47:01: D3D9Reset called
11:47:01: ---------------------- Cleared D3D9 Capture ----------------------
11:47:02: successfully set up d3d9 hooks
11:47:02: D3D9EndScene called
11:47:02: D3D9Present called
11:47:02: DoD3D9CPUHook: success
11:47:03: successfully capturing d3d9 frames via CPU
11:47:09: ---------------------- Cleared D3D9 Capture ----------------------
11:47:09: D3D9EndScene called
11:47:09: D3D9Present called
11:47:17: D3D9Reset called
11:47:17: ---------------------- Cleared D3D9 Capture ----------------------
11:47:17: successfully set up d3d9 hooks
11:47:17: D3D9EndScene called
11:47:17: D3D9Present called