Plex can only use the GPU if you haver the paid version. Those features are disabled in the free version. I run my plex server on Windows Server 2016 with an I7-3770K CPU @ 3.5GHz and 16GB RAM, with no dedicated graphics card, just the Intel on CPU graphics. I have no performance problems with transcoding videos using the free version of plex.

I use Jellyfin which is similar to Plex. I have it on a Raspberry Pi 4 8 GB. It's perfectly fine if I'm sending H264 but most modern browsers do not support H265 so it forces the server to transcode. That will consume almost all processing power if it's CPU-only and is a very slow process.

If you use a third party app that can play directly, like Infuse, or your CPU has Intel QuickSync, then you'll likely be fine. For security cameras unless you need any sort of facial recognition or object detection just a CPU will still be fine. If you need anything more advanced then a GPU is necessary

Bought an Intel A750 for transcoding on my Jellyfin server. The CPU did fine for just 1 or 2 people watching at the same time. It just pegged out the CPU at 100%. Plus had limited support for what types could be transcoded. With the A750 can easily handle several people watching at the same time and can transcode any format. With little CPU usages, so everything else running stays fast.

Transcoding

If you want object detection with your ip cameras, you can use Frigate, and to have good performance, you can buy a Google Coral to perform the object detection part.

I have found transcoding to work noticeably better when using quicksync (the intel chip native encoder) rather than a GPU.

At this point, I think the only real reason you would want a GPU is for LLMs.

Plex server or running your own LLM

Jellyfin transcoding.

Just about anything Machine Learning or AI, Transcoding for a media server, render farm for something like blender perhaps?

Get an Intel cpu with iGPU (most do) and you’ll be good to go for anything that you’re doing there.

I use a p4000 to transcode Plex content. The GPU uses less power than maxing out my CPU. I also have the GPU available in Kasm though I'm unsure if that works as I mostly use kasm as a SSH jumpbox or access to an unfiltered Chrome session at work.

When I upgrade my CPU, I plan to put my spare 1650 in my host and spin up a windows gaming VM for guests and remote play.

I added a cheap Quadro p400 to my Unraid server as the old girl (4790s) couldn’t handle h265 on the igpu.

Far cheaper and easier than a whole server upgrade just for a little more capability when transcoding.

Interested in the arc a380 just for transcoding when the kernel is updated to support the cards in Unraid natively when they eventually do but in no rush to do so.

Consider any low power gpu for media hardware transcoding

I stream games from my server PC using steam-headless.

If you run an AI server or crypto miner. Mostly

Yes, GPU for transcoding is reason enough, but object detection using frigate, or AI stuff is nice also. Buy a nvidia.

With plex, an intel quick sync igpu will be fine unless you plan to do >10 transcodes at a time

My main server has a 3070 and I use it to stream games through moonlight to all my tvs and computers around the house. That way I get the most value from the card instead of it being locked into one machine

I have two GPUs in a single tower.

A GTX 750 to that I share with my LXCs. It does jellyfin transcode, frigate nvr for 3 cameras, kasm accelerated desktops, xfce4 pve host acceleration, Jupyter tensorflow, ersatz tv transcode, and I plan to use it for immich. At most it is taxed about 25 percent but I plan to have a lot more nvr and jellyfin streams.

I also have a 1660 ti passed to windows 11 VM for my gaming VM. I use sunshine and moonlight for remote gaming but I also roll easy diffusion for some image generation. I had an LLM but (https://github.com/oobabooga/text-generation-webui) but it was too slow for what I'm used to - I just use bing chat and now meta on whatsapp for my personal and an LLM I have access to at work.

There's the possibility of self hosted speech recognition for use with Mycroft or other personal assistants. Saves you from having Amazon listen to your every word.

Plex will benefit with GPU and for security cameras you can have something like Frigate for object recognitions

plex would benifit from using a gpu