Vega Pro 23 Rendering not using NVIDIA GPU

robert-weitkamp wrote on 3/2/2026, 3:37 AM

I have a new system that includes an AMD Ryzen 9950X, Nvidia RTX 4070 Super, 64G Ram and I can't get better than 8-9 FPS on rendering for YouTube. I manually choose NVENC and I don't see the software using the GPU at all. I used to get 30-40 FPS on a much older system. I also tried rolling back my driver to: Studio Driver 581.57 as recommended in some posts, but no improvement. I used clean install and even used the NVIDIA driver cleanup app before reinstalling. No luck. I should be getting much better performance than this.

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Howard-Vigorita wrote on 3/4/2026, 9:26 PM

Creating subclips from spit clips using the timeline/clip context menu can cut the slowdown in half... but it probably won't amount to much with the small number of 1 second self-overlaps in this project.

robert-weitkamp wrote on 3/5/2026, 3:24 AM

See link for media:

https://drive.google.com/file/d/12gliYtlIBi45-sfkX24L3BzRRUUtDqQq/view?usp=drive_link

RogerS wrote on 3/5/2026, 7:51 AM

Thanks! I replaced up to 1240 (I made multiple copies of the media you shared and renamed them) and did a render.

The first clips didn't seem to use GPU decoding but render averaged 80fps or so. Not bad.

From the halfway mark (bubble wrap media) it did, though the render speed seemed to slow down. HWInfo didn't indicate throttling.

The end average framerate for the render was around 38fps.

Harold-Linke wrote on 3/5/2026, 8:41 AM

I have copied your 4 mts-files 10 times and renamed them, so that the names match with the files names expected in your project.Openend the project and started rendering: Rendering started with an average speed 300fps. After 30% the average speed is 190fps and then stayed at this speed. CPU usage is arround 20 to 25%. To be honest, I have no idea anymore why it is so slow on your system and does not use the GPU. The only missing item is your mp4 title sequence.

The only difference I see is that you have an AMD system. Could there be an issue?

Howard-Vigorita wrote on 3/5/2026, 12:15 PM

Just downloaded the clips and threw them into new project with 1 sec overlaps and rendered with the default Nvenc template on my laptop and get about 175 fps average with default Nvidia 59.94 template which matches the media. Decoding utilization was between 30% and 40% in Task Manager and the render took 30 sec. Changing the project manually to 29.97 to match the project uploaded earlier and rendering with the default Nvidia 29.97 template knocks the rendering frame rate down to 27 fps and took 1 min 36 sec to complete. Laptop has a 12900h cpu and Nvidia 3060 with Vegas set to use the 3060 in video prefs and auto (3060) decoding.

Looks like the big slowdown cause is the project and render not matching the frame rate of the mts media which is the bulk of the project.

3POINT wrote on 3/5/2026, 12:46 PM

Looks like the big slowdown cause is the project and render not matching the frame rate of the mts media which is the bulk of the project.

When resampling method is set to optical flow, another dramatic slowdown factor is added, which could explain the low renderspeed of @robert-weitkamp