# Where does electrical power in PC or other electronic devices goes?

I am wondering where does energy goes for example in PC?

As I understand part of it definitely changes to the heat and dissipates, but what about rest of the energy? There is no moving parts except fan. Does the energy in PC is used to move electrons inside electrical components like CPU etc.

 One more thought, some of the power can be dissipated in transistors because each transistor p-n junction have voltage drop of $0.7~\mathrm{V}$.

• It all ends up as heat, dispersed every more uniformly throughout the computer and its surroundings as the Universe grinds inexorably onwards to its ultimate heat death ..... “Here I am, brain the size of a planet and they ask me to take you down to the bridge. Call that job satisfaction? ‘Cos I don’t.” Commented Jul 28, 2016 at 12:54
• @WetSavannaAnimalakaRodVance Quoting Marvin the paranoid android? You might enjoy youtube.com/watch?v=VnbiVw_1FNs - especially the end. Commented Jul 29, 2016 at 11:36
• @Floris I came up with the whole inexorable grinding towards the heat death bit and thought to myself, "that sounds exactly like something Marvin would say". Commented Jul 29, 2016 at 12:36
• Quoting from memory: "Heat is work, and work's a curse/And all the heat in the universe/ is gonna cool down. /And there'll be no more heat. /And there'll be no more work. /And there'll be perfect peace. /Yeah! That's entropy, man!" Commented Jul 29, 2016 at 12:44

Even in this case the power $P = U \cdot I_b \approx 0.7 V \cdot I_b$ of the base current is dissipated into heat. Where else should it go?