My understanding is that LGA 1700 cpus don’t have multiple integrated gpus. They have a singular one. Given that the 14900k is basically a refresh of the 13900k I’m fairly certain that the following image should ilustrate that the iGPU is separate from basically any singular core:
The option for multiple GPUs being assigned even though only one is present is a ‘feature’ even in the Plex app (I only have 1 nvidia GPU):
I also know that on proxmox I’ve had to make extensive use of vGPUs which slice up the iGPU into several vGPUs that I can tell pass through to VMs. This required some work following along the efforts of those more talented that me to implement. I don’t believe this is even close to default on anything at all, let alone TrueNAS.
I don’t think you’re actually allocating 2 of anything because you ain’t got it. I think that the CPU load you’re seeing on specific cores is exactly that; a CPU work load that Jellyfin is using to analyze new media. Generally the GPU/iGPU is used for transcoding for when you want to change bitrate or encoding to meet playback needs on whatever device you’re using. Heavy cpu usage for analyzing media is normal; gpu only shines during playing of said media (when transcoding).
You can likely play around in the app settings for how many CPU core you’re allocating. You can also go to apps, settings, advanced settings, & confirm the ‘Integrated Loadbalancer’ is enabled. I don’t think either is necessary.
Realistically having specific cores loaded harder than others is normal. Something I noticed with the 13900k is that it has preferred cores from the factory; this are the ones that generally boost to the inane speeds intel has set as during manufacturing intel’s magic sand wizards have decided that those specific cores are the most capable ones when your specific CPU was made. For me I think it is cores 4 & 5 on my 13900k.
So it’d make sense when there is an intensive task that requires high single core load that your processor picks those specific cores to get 'er done. Thermal issues on the 13900k/14900k are more to do with needful bios tuning, setting reasonable clock speeds, setting voltage caps, and mostly underclocking because intel pumped these chips way too hard. It won’t be because 2 cores out of many are preferred that you’ll eventually have issues with your 14900k - it’ll be due to the unreasonable default settings, microcode, and manufacturing issues that intel has made. Details on that can be viewed here:
