...until you look at the power consumption.

I've done this for years, my old PC becomes my media server.

(Oops, replied to my own comment.)

As a tip for the selfhosters who like to reuse older hardware, look for pcs with cpus made by via. The late models had a very low power consumption for the time and were already x86_64. You can do some nice stuff with them.

Why not just use your current PC as a nas