Technical Reference

2.11 Electrical Considerations

2.11.1DC Loading

Table 37 lists the DC loading characteristics of the board. This data is based on a DC analysis of all active components within the board that impact its power delivery subsystems. The analysis does not include PCI add-in cards. Minimum values assume a light load placed on the board that is similar to an environment with no applications running and no USB current draw. Maximum values assume a load placed on the board that is similar to a heavy gaming environment with a

500 mA current draw per USB port. These calculations are not based on specific processor values or memory configurations but are based on the minimum and maximum current draw possible from the board’s power delivery subsystems to the processor, memory, and USB ports.

Use the datasheets for add-in cards, such as PCI, to determine the overall system power requirements. The selection of a power supply at the system level is dependent on the system’s usage model and not necessarily tied to a particular processor speed.

Table 37. DC Loading Characteristics

 

 

 

 

DC Current at:

 

 

 

 

 

 

 

 

 

 

 

Mode

DC Power

+3.3 V

+5 V

 

+12 V

 

-12 V

+5 VSB

 

 

 

 

 

 

 

 

 

Minimum loading

200.00 W

3.30 A

10.00 A

 

9.00 A

 

0.03 A

0.80 A

 

 

 

 

 

 

 

 

 

Maximum loading

300.00 W

6.00 A

14.00 A

 

16.00 A

 

0.10 A

1.40 A

 

 

 

 

 

 

 

 

 

2.11.2Add-in Board Considerations

The boards are designed to provide 2 A (average) of +5 V current for each add-in board. The total

+5 V current draw for add-in boards for the boards is as follows:

A fully loaded Desktop Board D925XCV (all six expansion slots and the PCI Express x16 slot filled) must not exceed 14 A.

A fully loaded Desktop Board D925XBC (all three expansion slots and the PCI Express x16 slot filled) must not exceed 8 A.

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Intel D925XBC, D925XCV specifications Electrical Considerations, Add-in Board Considerations, DC Loading Characteristics

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.