For a full desktop class chip, I think that's about as low as it can go. You could go lower with something like a NUC, but 15 watts is really good. 15 watts idl

For a full desktop class chip, I think that's about as low as it can go. You could go lower with something like a NUC, but 15 watts is really good. 15 watts idle would cost something like $1.50 to $2 to run 24/7.