https://www.technikaffe.de/anleitung-32-c_states_p_states_s_states__energieverwaltung_erklaert

S-States

The sleep states are controlled via the energy management of the operating system. After an arbitrary time, the system (if supported) then shuts down to the respective S-state.

State	description	power consumption
S0	Working / on	100%
S1	Sleep / CPU stopped
S2	Deeper Sleep / CPU off
S3	Standby (Save to RAM)	~ 1 Watt
S4	Hibernation (Save to disk)	~ 0,1 Watt
S5	System power off	~ 0,1 Watt