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15th June 2018, 17:26 | #1 | Link |
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Potplayer and MadVR, strange gpu usage?
Been using PotPlayer (on Windows 10) for a while now and everything works fine, however I recently noticed that my GPU usage gets halved if a play something not at its original video size (could have been doing that from the start, I just recently noticed it).
I don't think it's a problem with the video, since it happens with all video files. Even these samples. If I play the 720p and the 1080p videos in their original size my GPU load is around 40%. But if I upscale or downscale the window by a few pixels the GPU load is halved to around 20%, why? If I return the window to its original size the GPU load is back at around 40%. I'm sure same thing happens with the 4K sample, but it will always be downscaled since I'm on a 1440p monitor. I think I've narrowed it down to the MadVR setting Chroma Upscaling, using NGU with Standard, very high quality. If I change that to Standard, medium quality or lower. The GPU usage does not get halved. I have been following this guide to get MadVR running together with PotPlayer Last edited by dll32; 15th June 2018 at 19:54. Reason: Added Operating system. |
15th June 2018, 20:50 | #5 | Link | |
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Quote:
GPU core clock stays at around 1923 MHz when I play the video. When I exit it returns to 1455 Mhz after a while. GPU memory clock at 1370 Mhz. Resizing the window a few pixels does not change the core or memory clock only the GPU load changes. It gets halved. |
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15th June 2018, 21:54 | #6 | Link |
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Put an empty folder called "ShowRenderSteps" in the madVR directory and check madVR's OSD.
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madVR options explained |
15th June 2018, 23:39 | #7 | Link | |
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However, when resized DXVA is used instead. I've attached a image of the OSD when at original and resized. |
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16th June 2018, 01:39 | #8 | Link |
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Report your own post to get approved faster or just get an image hosting website
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Monochrome Anomaly |
16th June 2018, 05:15 | #9 | Link |
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If you set DXVA for upscaling it overrides the chroma upscaling setting (DXVA does both chroma and image upscaling). When upscaling triggers your chroma algorithm goes from NGU to DXVA so a large drop in GPU usages makes sense.
Switch to Spline, Lanczos, or Jinc if you want fast decent upscaling without using a doubling algorithm like NGU.
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madVR options explained |
16th June 2018, 10:42 | #10 | Link | ||
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I thank you all for the help! |
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