ACPI features include:

Plug and Play (including bus and device enumeration)

Power management control of individual devices, add-in boards (some add-in boards may require an ACPI-aware driver), video displays, and hard disk drives

Methods for achieving less than 15-watt system operation in the power-on/standby sleeping state

A soft-off feature that enables the operating system to power-off the computer

Support for multiple wake-up events

Support for a front panel power and sleep mode switch

The Server Board S875WP1-E supports sleep states S0, S1, S2, S3, S4, and S5. When the server board is operating in ACPI mode, the operating system retains control of the system and the operating system policy determines the entry methods and wake-up sources for each sleep state. Sleep entry and wake-up event capabilities are provided by the hardware but are enabled by the operating system. The following is a summary of the supported sleep states:

S0: Normal running state.

S1: Processor sleep state. No context will be lost in this state and the processor caches will maintain coherency.

S3: Suspend to RAM (Instantly Available PC Technology).

S4: Hibernate or Save to Disk. The memory and machine state are saved to disk. Pressing the power button or another wake-up event restores the system state from the disk and resumes normal operation. This state assumes that no hardware changes were made to the system while it was off.

S5: Soft off. Only the RTC section of the chipset is running in this state.

CAUTION

The system is off only when the AC power is disconnected.

Table 8 lists the system states based on how long the power switch is pressed, depending on how ACPI is configured with an ACPI-aware operating system.

Table 8. Effects of Pressing the Power Switch under ACPI

 

…and the power switch is

 

If the system is in this state…

pressed for

…the system enters this state

 

 

 

Off

Less than four seconds

Power-on

(ACPI S5 – Soft off)

 

(ACPI S0 – working state)

 

 

 

 

 

On

Less than four seconds

Soft-off/Standby

(ACPI S0 – working state)

 

(ACPI S1 – sleeping state)

 

 

 

 

 

On

More than four seconds

Fail safe power-off

(ACPI S0 – working state)

 

(ACPI S5 – Soft off)

 

 

 

 

 

Sleep

Less than four seconds

Wake-up

(ACPI S1 – sleeping state)

 

(ACPI S0 – working state)

 

 

 

 

 

Sleep

More than four seconds

Power-off

(ACPI S1 – sleeping state)

 

(ACPI S5 – Soft off)

 

 

 

 

 

Server Board Features

25

Page 25
Image 25
Intel S875WP1-E manual Effects of Pressing the Power Switch under Acpi

S875WP1-E specifications

The Intel S875WP1-E is a high-performance server motherboard designed to meet the demanding requirements of enterprise-level applications. It is ideally suited for those seeking a robust solution for data centers, cloud computing, and various business applications. Built on the Intel 875P chipset, the S875WP1-E delivers impressive features and technologies that enhance functionality and reliability.

One of the standout characteristics of the Intel S875WP1-E is its support for dual Intel Xeon processors. This allows for significant processing power, enabling businesses to run multiple applications simultaneously without compromising performance. With its dual-socket configuration, the motherboard supports a range of Xeon processors, maximizing scalability for evolving workloads.

The motherboard supports up to 16GB of DDR SDRAM, utilizing ECC (Error-Correcting Code) memory, which ensures data integrity and system stability. The capability to handle large amounts of memory is critical for applications requiring high data throughput and reliability, such as virtualization and database management.

In terms of storage, the S875WP1-E features several Serial ATA (SATA) ports, supporting RAID configurations, which can enhance data redundancy and performance. This flexibility in storage options ensures that businesses can tailor their systems according to specific storage needs. Additionally, it also supports PATA (Parallel ATA) drives, allowing for integration of legacy systems.

The expansion capabilities of the S875WP1-E are notable, as it includes multiple PCI Express and PCI slots, accommodating various expansion cards, including graphics cards, network interfaces, and storage controllers. This versatility is essential for organizations looking to customize their systems based on specific application requirements.

Networking capability is another highlight of the Intel S875WP1-E. It comes equipped with integrated Gigabit Ethernet, providing fast network access essential for server operations. The motherboard also features additional options for network expansion, ensuring that businesses can connect seamlessly to their networks.

Thermal management is another strong aspect of the S875WP1-E design. With a range of features aimed at maintaining optimal operating temperatures, including robust power regulation, it helps to prolong the lifespan of components and enhance overall system reliability.

In summary, the Intel S875WP1-E motherboard is a powerful solution for enterprise environments, offering dual processor support, ample memory capacity, flexible storage options, and comprehensive networking capabilities. Its design prioritizes stability and performance, making it an ideal choice for those looking to build a reliable server infrastructure tailored to their organization's needs.