12600k power saving option

Hi guy, first time home nas builder here. I have some questions and I am looking forward to your discussion! I will be using my old system (12600k+32gb ddr5 ram) as my Tru Nas machine. For power saving, should I 1. Disable E-cores 2. Disable E-cores and 2 of the P-Cores 3. Disable Hyperthreading? I now the cpu is a bit of overkill as I am only planning on running Jellyfin and Pi Hole on it. Also, should I disable my memory xmp to save a little bit of power? Thank you for your feedback!