System Memory, Supported Memory Configurations

Intel Desktop Board D925XCV/D925XBC Technical Product Specification

1.6 System Memory

The boards have four DIMM sockets and support the following memory features:

•1.8 V (only) DDR2 SDRAM DIMMs

•Unbuffered, single-sided or double-sided DIMMs with the following restriction: Double-sided DIMMS with x16 organization are not supported.

•4 GB maximum total system memory. Refer to Section 2.2.1 on page 55 for information on the total amount of addressable memory.

•Minimum total system memory: 128 MB

•Non-ECC DIMMs

•Serial Presence Detect

•DDR2 533 MHz or DDR2 400 MHz SDRAM DIMMs

✏NOTES

•Remove the PCI Express x16 video card before installing or upgrading memory to avoid interference with the memory retention mechanism.

•To be fully compliant with all applicable DDR SDRAM memory specifications, the board should be populated with DIMMs that support the Serial Presence Detect (SPD) data structure. This allows the BIOS to read the SPD data and program the chipset to accurately configure memory settings for optimum performance. If non-SPD memory is installed, the BIOS will attempt to correctly configure the memory settings, but performance and reliability may be impacted or the DIMMs may not function under the determined frequency.

Table 6 lists the supported DIMM configurations.

Table 6.	Supported Memory Configurations

DIMM			SDRAM	SDRAM Organization	Number of SDRAM
Capacity		Configuration	Density	Front-side/Back-side	Devices

128 MB		SS	256 Mbit	16 M x 16/empty	4

256 MB		SS	256 Mbit	32 M x 8/empty	8

256 MB		SS	512 Mbit	32 M x 16/empty	4

512 MB		DS	256 Mbit	32 M x 8/32 M x 8	16

512 MB		SS	512 Mbit	64 M x 8/empty	8

512 MB		SS	1 Gbit	64 M x 16/empty	4

1024 MB		DS	512 Mbit	64 M x 8/64 M x 8	16

1024 MB		SS	1 Gbit	128 M x 8/empty	8

2048 MB		DS	1 Gbit	128 M x 8/128 M x 8	16

Note: In the second column, “DS” refers to double-sided memory modules (containing two rows of SDRAM) and “SS” refers to single-sided memory modules (containing one row of SDRAM).

INTEGRATOR’S NOTE

Refer to Section 2.2.1, on page 55 for additional information on available memory.

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.