You probably need to decide what 'low power' means in W first, and determine your other constraints like socket, cores/threads/whether you are using ECC memory.
I had in my mind that there were quite a variety of options at 15-20W but when I looked I was only finding stuff at 55-65W. I'm not sure whether there is something different I need to be searching for.
You probably need to decide what 'low power' means in W first, and determine your other constraints like socket, cores/threads/whether you are using ECC memory.