Intel Desktop Board D925XCV/D925XBC Technical Product Specification

1.7.3Real-Time Clock, CMOS SRAM, and Battery

A coin-cell battery (CR2032) powers the real-time clock and CMOS memory. When the computer is not plugged into a wall socket, the battery has an estimated life of three years. When the computer is plugged in, the standby current from the power supply extends the life of the battery. The clock is accurate to ± 13 minutes/year at 25 ºC with 3.3 VSB applied.

NOTE

If the battery and AC power fail, custom defaults, if previously saved, will be loaded into CMOS RAM at power-on.

1.8 PCI Express Connectors

The boards provide the following PCI Express connectors:

One PCI Express x16 connector. The x16 interface supports simultaneous (full duplex) transfer speeds up to 8 GBytes/sec. Single-ended (half duplex) transfers are supported at up to

4 Gbytes/sec.

Four PCI Express x1 connectors on the D925XCV board; two PCI Express x1 connectors on the D925XBC board. The x1 interfaces support simultaneous transfer speeds up to

500 MBytes/sec

The PCI Express interface supports the PCI Conventional bus configuration mechanism so that the underlying PCI Express architecture is compatible with PCI Conventional compliant operating systems. Additional features of the PCI Express interface includes the following:

Support for the PCI Express enhanced configuration mechanism

Automatic discovery, link training, and initialization

Support for Active State Power Management (ASPM)

SMBus 2.0 support

Wake# signal supporting wake events from ACPI S1, S3, S4, or S5

Software compatible with the PCI Power Management Event (PME) mechanism defined in the PCI Power Management Specification Rev. 1.1

1.9Auxiliary Power (AUX PWR) Output Connector

The D925XCV board includes a 1x4 power connector that can be used to provide power for internal chassis lighting or additional fans. The use of this connector requires an ATX12V power supply with a 24-pin (2x12) main power cable. If a power supply with a 20-pin (2x10) main power cable is used, the auxiliary power output connector may not function.

The on/off function of this connector is controlled from within the BIOS Setup Program. The default setting in the BIOS is for this connector to be off.

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Intel D925XCV PCI Express Connectors, Auxiliary Power AUX PWR Output Connector, Real-Time Clock, Cmos SRAM, and Battery

D925XBC, D925XCV specifications

The Intel D925XBC and D925XCV are motherboards designed for Intel's LGA 775 socket, targeted primarily at the desktop market during the mid-2000s. These motherboards support Intel's innovative 800 MHz Front Side Bus and provide a robust platform for various computing applications, including gaming and multitasking.

One of the standout features of the D925XBC and D925XCV is their compatibility with Intel's Pentium 4 and Pentium D dual-core processors. These processors deliver impressive performance, especially for users engaging in demanding tasks such as video editing and 3D rendering. The support for dual-channel DDR2 memory allows for increased bandwidth and improved overall system performance, accommodating up to 8 GB of memory in total.

The motherboards are equipped with the Intel 925X chipset, which integrates advanced technologies. This chipset supports Intel's Enhanced Memory 64 Technology (EM64T), allowing for more efficient processing power and better resource management. The presence of the I/O Controller Hub (ICH6) also enhances connectivity options, including SATA 3.0 Gbps interfaces for faster data transfer rates and improved storage capabilities.

Regarding expansion and connectivity, both motherboards feature multiple PCI Express slots along with PCI slots, allowing users to customize their systems according to their needs. This expandability is essential for gamers and professionals looking to add advanced graphics cards and other peripherals. Additionally, these boards come with integrated audio, ensuring satisfactory sound quality without the need for additional sound cards.

The D925XBC and D925XCV motherboards also include integrated Ethernet controllers, supporting fast network connectivity essential for gaming and high-speed internet access. With multiple USB ports available, users can connect a wide variety of devices easily, enhancing the flexibility of their setups.

In terms of form factor, both boards follow the ATX layout, providing compatibility with a broad range of computer cases. This ensures ease of installation and upgrades while promoting good airflow and optimal thermal management for the components installed.

Overall, the Intel D925XBC and D925XCV motherboards integrate essential features and technologies that provide a solid foundation for desktop computing during their time. With strong processing capabilities, expandability, and good connectivity options, these boards were well-received by users looking for reliable performance and versatility in their systems.