Piracy: ꜱᴀɪʟ ᴛʜᴇ ʜɪɢʜ ꜱᴇᴀꜱ

Edit: I'm on Linux Edit 2: B550 AMD chipset

I am seeding from an AMD Ryzen 7 5700G system and with all the peripherals turned off and disconnected, instantaneous load was about 65 watts, until I undervolted it (negative 30, all cores), after which it has been fluctuating around 60 watts.

I'd like to keep seeding indefinitely - of course, my all time share ratio is at around 12 for now - but I'd like to use less energy and spend less money on it - even though the cost difference will be negligible, I guess.

Questions

1. Do you have any recommendations on what hardware to switch to?
2. Or any suggestions on further tweaking the power setting's in the BIOS? For now, I'm using AMD's AI solution for undervolting (PBO or Curve Optimizer or whatever it's called?), but there is for instance also the actual overclocking menu, which would force settings on the CPU.
3. What do you think about putting a single board computer inside my desktop (the chassi is HUGE) and somehow hooking up my four 4TB 2.5 inch torrenting SSDs to it? Possibly still powering them with my desktop's PSU? And running the client (qBittorrent) on the SBC?