As many are onto NDI and many know the evil word "encode" which drains resources, I've found the most efficient is recording in "native NDI" so zero encoding is done. Thus far I've only seen vMix do this. Sorry with my i7-8700K, 32Gb, nVidia 8Gb, SSD & nvme, I had several obs crashes and often pixelated recordings, this was four NDI streams of 4k, none of my task manager resources went past 82% except when using GPU for encoding, it hits 99% easily