HP EliteDesk 800 G1 Base Model Small Form Factor PC Manual de usuario descargar pdf (Pagina 40)

Appendix B: Overview of power, sleep, and global states

Under the Advanced Configuration and Power Interface (ACPI) specification, a PC may be in one of the following power

states (also known as Sleep (Sx) or Global (Gx) states).

• S0

S0 (also known as G0) is the On state, during which the PC is fully functional. All system devices and the operating

system, if available, are running.

• S3

S3 is the Standby (Microsoft® terminology) or Suspend-to-RAM state. The memory subsystem and V

aux

power rail remain

powered, while the remainder of the PC – including the processor – is not powered. After resuming from S3, the system

context is still intact because system memory was powered at all times.

• S4

S4 is the Hibernate (Microsoft terminology) or Suspend-to-Disk state. The system context is saved to the hard drive as a

hibernation file; when the PC resumes from S4, the system context is restored from this file.

During S4, V

aux

remains powered; all other subsystems – including system memory and the processor – are not powered.

• S5

S5 (also known as G2) is the Soft Off state and is identical to S4, except that the system context is not saved. When the

PC resumes from S5, it powers up and goes through POST.

• G3

G3 is the Mechanical Off state, during which all PC subsystems are powered off. The easiest way to achieve this state is by

removing utility power from the PC by unplugging the power cord.

ME power states

The ME has its own power states (Mx), as follows:

• M0

M0 is the On state for the ME; the PC is in S0 state. The ME is fully powered and running.

• M3

M3 is the On state for the ME; the PC is in a non-S0 state. The ME is fully powered and running.

• Moff

Moff is the Off state for the ME; the PC is in a non-S0 state.

The ME can be set to stay powered-on and active in all Sx states. In this scenario, if the PC is in S0, then the ME will be in the

corresponding M0 state; however, if the system is in S3, S4, or S5, the ME remains active but migrates to M3 state.

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HP EliteDesk 800 G1 Base Model Small Form Factor PC Manual de usuario Pagina 40