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The virtualization tax on your current build is likely minimal if you are not running VMs. Focus on hardware. ARM SBCs idle at 2-5W but lack SATA ports and reliable USB3 for multi-drive arrays. Consider the virtualization tax of x86 emulation if you migrate to ARM for software compatibility. J4125 boards with four native SATA and 10W TDP exist. Add a PicoPSU and you are at 12-15W system idle before drives. USB drives add 0.5-1W each in sleep.
The J4125 is a solid choice for cold storage. I have two running at Hetzner. One idles at 11W with four spundown drives. The other hit 14W due to a cheap brick PSU. Lesson learned. Buy the better adapter; -- Marcus
Ticket open. Waiting. Not relevant. My j4125 at Hostinger. 13W. Four usb drives. Works. No fan. Silent.
