This is where an intel HD630 will beat an nVidia RTX2080

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Participated in a development project where 4 real-time 1080p streams had to be re-encoded on a NUC sized device. It’s obviously not possible on CPU in this case so GPU rendering was my first thought. The intel Iris GPU in the NUC handled 4 decoding and 4 encoding sessions without any issues flawlessly in real time. Then I was playing around with an nVidia GT1030 in another machine which must be even better – one would thought – but it turned out that actually no, it doesn’t have the necessary nvenc hardware. Then I found this: https://developer.nvidia.com/video-encode-decode-gpu-support-matrix So GPU rendering (nvenc) is simply not possible on anything below the GTX1050 but the real surprise is that nVidia limits concurrent sessions on all consumer cards, be it a GTX1650 or an RTX2080. You’d think that it is because of the nvenc hw chip but if you look at the GTX1060 or the Titan V for example you see that it’s not the case. So what does it all mean? To be fair the nvenc hardware is much faster on the nvidia cards compared to intel HD, so if you are going to encode a 2 hour movie it is the better choice. But if you’d like to use the GPU to encode 3-4 (or even more) real-time streams it’s simply not possible even with the most powerful consumer nvidia card. I tried it on my HTPC (i3-7100, HD630, 2x 4GB 2133 DDR4, Manjaro KDE and no dGPU) and it handled the 4 streams (screen capture via vaapi in this case) without any issues. Tried it with 5 concurrent captures as well but there were some frame drops on one of them due to the unusually high memory bandwith, the GPU was far from being overloaded (around 70% utilization). With 4 streams there were no drops, and power consumption was below 6W. So this is where an HD630 will beat an RTX2080 🙂 (on the terminal tab #1 is htop, tab #2 is intel gpu tools, tab #3-6 are the ffmpeg captures via vaapi, #6 being what has been uploaded). https://reddit.com/link/e06lat/video/gue5fpzipa041/player submitted by /u/davidkisvari [link] [comments]

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Marisa

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