Thank you for the advice about the passmarks - I'll use that as a rough guide in future! I think I can safely make the assumption that the split between direct playing and transcoding is 50/50. I was being dumb and assuming all devices were direct playing because all the devices in my home do but after checking, there are a few external users with hardware that wasn't direct playing - probably why my CPU is having a hard time. Thank you so much for the detailed reply! Hopefully, all your Plex clients can play 4K directly or you have a 1080p library for remote streaming. If you are talking about transcoding (when needed) 4K/HEVC content, throw all this out the window because Plex says you need 17,000 passmarks for a single 4K/HEVC/10-bit transcoded stream. This whole discussion has centered on 1080p content. All direct play? A mix of direct play and transcoded? All transcoded? The bottom line is that you have to have a good idea how those eight streams of content are going to be delivered and plan accordingly with either CPU or GPU. That would mean at least a Ryzen 2700X or above. If you are going to stick to CPU transcoding, when transcoding is necessary, and you want to have the CPU overhead to handle 8 streams transcoded, you would need a CPU passmark score of around 18,000 (16,000 for eight 1080p streams + 2,000 for unRAID overhead). For direct played local content (no transcoding) it should be plenty. With a supported Nvidia graphics card in the system, the transcoding is offloaded to the GPU and the CPU passmark score does not become such a big concern.ฤก6GB RAM could be a bottleneck if you have other system activity plus multiple transcodes taking place however, that depends on the source format, target format, bitrate, etc. Your Ryzen 5 2400G has a passmark score of 8953, that is enough for the CPU to transcode up to 4 streams and leave barely enough overhead for unRAID itself with no other activity on the server. Transcoding recommendations from Plex are that each 1080p transcoded stream needs about 2000 passmarks. However, if content is being transcoded (converted to a different format or bitrate the client can play or streamed remotely), then that is, in fact, the limit of the Ryzen 5 2400G. If you are largely direct playing content locally, I am surprised it can't handle more than 3-4 simultaneous streams. Ideally, I don't want to change the motherboard so I'm hoping you can recommend something last-gen that's compatible and will allow more Plex streams.
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