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If you're using the new NVENC method, then adding a second GPU could slow things down. Since the new NVENC composites in GPU, and keeps the frame in the GPU for encoding. Second GPU would mean that OBS would have to shuffle data between GPUs using system memory and could cause a bigger slow down.
Yes. Should you do it? No and here's why: First of all (in laymans terms): With the new NVENC encoder option in OBS Studio, the captured frame is kept on the GPU, if you have to move the frame from one GPU to the other GPU for encoding, you loose time and performance. Second:
With the new NVENC encoder option in OBS Studio, the captured frame is put directly into the NVENC on the GPU, if you have to move the frame from one GPU to the other GPU for encoding, you loose performance.
Aug 22, 2018 · Yes, if you get separate GPU for encoding, you still get dropped frames if the GPU OBS is running on is on 100%. And you cannot set priorities on the GPU (see the edit of my previous post). Now you might think you can try to run OBS on one GPU for composing and your game on a second GPU.
Feb 7, 2011 · For consistent scaling, specifically with systems with many CPU cores, you should divide the work by frames, because each portion of the encoding pipeline takes differing times to complete.
- Andrew Ku
Oct 26, 2021 · Nvenc has the nice property of being able to directly encode from the frame buffer of the GPU, so on 1 GPU the raw picture data is not required to be copied even once through the pci-express bus, so 1 Nvidia GPU card with Nvenc (new) as encoder is the most efficient solution.
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Jan 5, 2024 · Split-frame encoding (SFE) is a breakthrough feature that unlocks video encoding capabilities at 8K60 and beyond. It empowers users to harness the power of multiple NVENCs within NVIDIA Ada Lovelace architecture GPUs for encoding a single video sequence.
