System States and Power States | Intel D945GCLF2 manual

Intel Desktop Board D945GCLF2 Technical Product Specification

1.13.1.1System States and Power States

Under ACPI, the operating system directs all system and device power state transitions. The operating system puts devices in and out of low-power states based on user preferences and knowledge of how devices are being used by applications. Devices that are not being used can be turned off. The operating system uses information from applications and user settings to put the system as a whole into a low-power state.

Table 7 lists the power states supported by the board along with the associated system power targets. See the ACPI specification for a complete description of the various system and power states.

Table 7. Power States and Targeted System Power

Global			Processor		Targeted System
States	Sleeping States		States	Device States	Power (Note 1)
G0 – working	S0	– working	C0 – working	D0 – working	Full power > 30 W
state				state.

G1 – sleeping	S1	– Processor	C1 – stop	D1, D2, D3 –	5 W < power < 52.5 W
state	stopped		grant	device
				specification
				specific.

G1 – sleeping	S3	– Suspend to	No power	D3 – no power	Power < 5 W	(Note 2)
state	RAM. Context			except for
	saved to RAM.			wake-up logic.

G1 – sleeping	S4	– Suspend to	No power	D3 – no power	Power < 5 W	(Note 2)
state	disk. Context			except for
	saved to disk.			wake-up logic.

G2/S5	S5	– Soft off.	No power	D3 – no power	Power < 5 W	(Note 2)
	Context not saved.			except for
	Cold boot is			wake-up logic.
	required.

G3 –	No power to the		No power	D3 – no power for	No power to the system.
mechanical off.	system.			wake-up logic,	Service can be performed
AC power is				except when	safely.
disconnected				provided by
from the				battery or
computer.				external source.

Notes:

1.Total system power is dependent on the system configuration, including add-in boards and peripherals powered by the system chassis’ power supply.

2.Dependent on the standby power consumption of wake-up devices used in the system.

D945GCLF2 specifications

The Intel D945GCLF2 is a compact and efficient motherboard designed for the Intel Atom processor family, particularly suited for low-power, cost-sensitive systems. This mini-ITX form factor board was released as a part of Intel's D945 series, targeting small form factor PCs, embedded systems, and home theater PC (HTPC) builds.

One of the standout features of the D945GCLF2 is its support for the Intel Atom N270 processor, a dual-core CPU that operates at a low thermal design power (TDP) of just 4 watts. This makes the board ideal for users looking to build energy-efficient systems without compromising on performance. The motherboard supports up to 2GB of DDR2 RAM, utilizing a single-channel memory architecture, which, while modest by today’s standards, suffices for basic computing tasks such as browsing, document editing, and media playback.

In terms of connectivity, the D945GCLF2 integrates a variety of I/O ports that enhance usability. It features four USB 2.0 ports, one PCI slot, and an IDE connector, catering to older peripherals while also allowing for the installation of additional components like graphics cards and network adapters. The onboard Intel Graphics Media Accelerator 950 provides adequate graphics performance for everyday activities and even supports HD video playback, making it a solid choice for multimedia applications.

Incorporating Intel's Advanced Configuration and Power Interface (ACPI) technology, the D945GCLF2 allows for efficient power management, giving users the flexibility to optimize their system's energy consumption. The board also includes essential connectivity options such as Ethernet through a 10/100 LAN port, facilitating wired networking capabilities.

Furthermore, the D945GCLF2 is equipped with multiple storage options; it provides support for Serial ATA (SATA) devices, allowing for faster data transfer rates compared to traditional PATA drives. The BIOS is user-friendly and offers a range of settings for users looking to tweak their system's performance.

Overall, the Intel D945GCLF2 motherboard is a robust solution for anyone looking to build a low-cost, low-power computing system. Its combination of small form factor, energy efficiency, and decent performance makes it suitable for a variety of applications, from basic user tasks to serving as the core of a compact home theater setup. Despite its age, the D945GCLF2 remains relevant for specific, budget-friendly builds, showcasing Intel's legacy in innovative motherboard design.