S3 is what you use with Media Centre


S0
Working
System is on and fully operational.
Away
System appears off, but the PC is kept operational. The display is blank and the audio is mute.

S1
Standby (Not normally used)
System appears off. The CPU is stopped; RAM is refreshed; the system is running in a low power mode. This state can operate when a card or peripheral does not recognize S3.

S2
Standby (Not normally used)
System appears off. The CPU has no power; RAM is refreshed; the system is in a lower power mode than S1.

S3
Standby (Normally used)
System appears off. The CPU has no power; RAM is in self refresh; the power supply
is in a reduced power mode. This mode is also referred to as 'Save To RAM'.

S4
Hibernate
System appears off. The hardware is completely off, but the system memory has been saved as a temporary file onto the harddisk. This mode is also referred to as 'Save To Disk'.

S5
Off
System is off. The hardware is completely off, the operating system has shut down; nothing has been saved. Requires a complete reboot to return to the Working state. The clock works.