Intel Desktop Board D925XCV/D925XBC Technical Product Specification

Memory-mapped I/O that is dynamically allocated for PCI Conventional and PCI Express add- in cards

The amount of installed memory that can be used will vary based on add-in cards and BIOS settings. Figure 18 shows a schematic of the system memory map. All installed system memory can be used when there is no overlap of system addresses.

4 GB

Top of System Address Space

FLASH

APIC

~20 MB

Reserved

PCI Memory Range - contains PCI, chipsets, Direct Media Interface (DMI), and ICH ranges (approximately 750 MB)

Top of usable DRAM (memory visible to the operating system)

0FFFFFH

Upper BIOS

 

 

0F0000H

area (64 KB)

 

 

 

 

0EFFFFH

Lower BIOS

 

 

area

 

 

(64 KB;

0E0000H

16 KB x 4)

 

 

 

0DFFFFH

Add-in Card

 

 

BIOS and

 

 

Buffer area

 

 

(128 KB;

 

 

16 KB x 8)

1MB

960 KB

896 KB

DRAM

Range

DOS

Compatibility

Memory

1 MB

640 KB

0C0000H

 

 

0BFFFFH

Standard PCI/

 

 

ISA Video

 

 

Memory (SMM

 

 

Memory)

0A0000H

 

128 KB

09FFFFH

 

DOS area

 

 

00000H

(640 KB)

 

768 KB

640 KB

0 MB

0 KB

OM17140

Figure 18. Detailed System Memory Address Map

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Intel D925XCV, D925XBC specifications Detailed System Memory Address Map

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.