you have to go for TCO to justify upgrades. energy alone most of the time doesn't justify replacing old hardware.
factor in space (=rent), age related increase in failure rate (=servicing), computer power needs (=opportunity costs) then together with the energy needs you find good points in time to justify an upgrade.
you have to go for TCO to justify upgrades. energy alone most of the time doesn't justify replacing old hardware.
factor in space (=rent), age related increase in failure rate (=servicing), computer power needs (=opportunity costs) then together with the energy needs you find good points in time to justify an upgrade.
energy is the least relevant of those.