Which PC mode uses the least amount of power?

Hibernate Mode uses the least amount of power because it saves the current state of the computer by writing all open documents and applications to the hard drive and then completely powers down the computer. This means that when it is turned back on, the previous session can be restored without using any energy while the computer is off.

Standby Mode, on the other hand, keeps the computer in a low-power state while maintaining the current session in memory. Although it consumes less power than when the computer is fully operational, it still draws some energy to keep the RAM active, making it less power-efficient compared to Hibernate Mode.

Sleep Mode also maintains information in memory while using even less power than Standby Mode but requires more power than Hibernate since it doesn’t fully turn off the hardware.

When the computer is Off, no power is consumed, making it the most power-efficient option overall. However, it does not allow for immediate resumption of work as Hibernate does.

Thus, Hibernate Mode is the optimal choice for minimizing power usage while allowing for quick resumption of work.