Product Description

1.7 Intel® 925X Chipset

The Intel 925X chipset consists of the following devices:

Intel 82925X Memory Controller Hub (MCH) with Direct Media Interface (DMI) interconnect

Intel 82801FR I/O Controller Hub (ICH6-R) with DMI interconnect

Firmware Hub (FWH)

The MCH is a centralized controller for the system bus, the memory bus, the PCI Express bus, and the DMI interconnect. The ICH6-R is a centralized controller for the board’s I/O paths. The FWH provides the nonvolatile storage of the BIOS.

For information about

Refer to

The Intel 925X chipset

http://developer.intel.com/

 

 

Resources used by the chipset

Chapter 2

 

 

1.7.1USB

The boards support up to eight USB 2.0 ports, supports UHCI and EHCI, and uses UHCI- and EHCI-compatible drivers.

The ICH6-R provides the USB controller for all ports. The port arrangement is as follows:

Four ports are implemented with dual stacked back panel connectors adjacent to the audio connectors

Four ports are routed to two separate front panel USB connectors

NOTES

Computer systems that have an unshielded cable attached to a USB port may not meet FCC Class B requirements, even if no device is attached to the cable. Use shielded cable that meets the requirements for full-speed devices.

For information about

Refer to

The location of the USB connectors on the back panel

Figure 20, page 66

 

 

The location of the front panel USB connectors on the Desktop Board D925XCV

Figure 21, page 68

 

 

The location of the front panel USB connectors on the Desktop Board D925XBC

Figure 22, page 70

 

 

1.7.2IDE Support

The board provides five IDE interface connectors:

One parallel ATA IDE connector, which supports two devices

Four serial ATA IDE connectors, which support one device per connector

1.7.2.1Parallel ATE IDE Interface

The ICH6-R’s Parallel ATA IDE controller has one bus-mastering Parallel ATA IDE interface. The Parallel ATA IDE interface supports the following modes:

Programmed I/O (PIO): processor controls data transfer.

8237-style DMA: DMA offloads the processor, supporting transfer rates of up to 16 MB/sec.

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Intel D925XBC, D925XCV Intel 925X Chipset, 1 USB, IDE Support, Parallel ATE IDE Interface, For information about Refer to

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.