Integration Guide for the Boxed Intel® Desktop Boards D845BG and D845PT

Chassis

Platforms based on the Intel® Pentium® 4 processor in the 478-pin package do not require a modified chassis (e.g., with additional mounting holes). Chassis for platforms based on the Intel Pentium 4 processor must have either an ATX12V, SFX12V or PS3-12V power supply and improved ventilation. We encourage integrators using ATX form-factor boards (D845BG) to choose a chassis that complies with the ATX 2.01 (or later) specification. Integrators using microATX form-factor boards (D845PT) should choose a chassis that complies with the microATX 1.0 (or later) specification.

Power Supply

The D845BG and D845PT boards require either an ATX12V, SFX12V or PS3-12V power supply that differs from previous ATX and SFX power supplies, respectively. The ATX12V, SFX12V and PS3-12V power supplies provide additional 12V processor current via a 2x2 pin connector that is required for proper operation.

The power management functions of the boards require a power supply with a minimum +5V standby current (+5Vsb) of 770mA. Intel highly recommends that you use a power supply with 1.5 to 2.0 A on the +5Vsb line. As more standby capable components are added to the platform, more standby current is needed to support these components.

Processor

The D845BG and D845PT boards were designed to support the Pentium 4 processor in the 478-pin package only. Table 1 below lists the current processor support for the D845BG and D845PT boards.

Table 1. Intel® Processor Support for Desktop Boards D845BG and D845PT

Processor Family	Processor Speed	System Bus Frequency	Cache Size	BIOS Version
Intel® Pentium® 4	2.6 GHz	400 MHz	512 KB	P06 or greater
	2.5 GHz	400 MHz	512 KB	P06 or greater
	2.4 GHz	400 MHz	512 KB	P04 or greater
	2.2 GHz	400 MHz	512 KB	P04 or greater
	2.0A GHz	400 MHz	512 KB	P04 or greater
	2.0 GHz	400 MHz	256 KB	P01 or greater
	1.9 GHz	400 MHz	256 KB	P01 or greater
	1.8A GHz	400 MHz	512 KB	P04 or greater
	1.8 GHz	400 MHz	256 KB	P01 or greater
	1.7 GHz	400 MHz	256 KB	P01 or greater
	1.6A GHz	400 MHz	512 KB	P04 or greater
	1.6 GHz	400 MHz	256 KB	P01 or greater
	1.5 GHz	400 MHz	256 KB	P01 or greater
	1.4 GHz	400 MHz	256 KB	P01 or greater
Intel® Celeron®
	2.2 GHz †	400 MHz	128 KB	P06 or greater
	2.1 GHz †	400 MHz	128 KB	P06 or greater
	2.0 GHz †	400 MHz	128 KB	P06 or greater
	1.8 GHz	400 MHz	128 KB	P04 or greater
	1.7 GHz	400 MHz	128 KB	P04 or greater

†This desktop board and processor combination is under evaluation and not yet validated. Use of unsupported processors may result in improper operation, damage to the desktop board or processor, or reduced product life. Except as provided in Intel's Terms and Conditions of Sale for such products, INTEL ASSUMES NO LIABILITY WHATSOEVER, AND INTEL DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY, RELATING TO SALE AND/OR USE OF THE INTEL PRODUCTS INCLUDING LIABILITY OR WARRANTIES RELATING TO FITNESS FOR A PARTICULAR PURPOSE, MERCHANTABILITY, OR INFRINGEMENT OF ANY PATENT COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT. This information is based on current expectations are subject to change without notice.

System Memory

The D845BG and D845PT boards have two DIMM slots that support 200 MHz and 266 MHz DDR SDRAM system memory. The board supports a minimum of 64MB of system memory and a maximum of 2 GB. The board supports both ECC and non-ECC DIMMs (ECC DIMMs will operate in non-ECC mode only). Mixed speed DIMM configuration will default to the slowest speed DIMM installed. All memory must comply with the following:

Unbuffered and non-registered single or double-sided DIMMs
Serial Presence Detect (SPD) memory
Non-ECC and ECC Dimms (Will run in Non-ECC mode)
2.5V 184-pin Dual Inline Memory Modules
Gold-plated contacts
Intel DDR JEDEC Specification Addendums

Graphics Adapters

The D845BG and D845PT boards are only compatible with 1.5V AGP graphics cards. Use of legacy 3.3V cards can result in damage to the card as well as the board.

Hard Drive

The D845BG and D845PT boards support Ultra ATA/66 and Ultra ATA/100 transfer rates. The 80-conductor Ultra ATA/66 cable supports Ultra ATA/100 transfers so the same cable may be used. The Ultra ATA Storage driver can be installed from the driver CD or you may download and install the latest Intel Ultra ATA Storage Driver.

I/O Peripherals

The D845BG and D845PT boards have a floppy controller, two PS/2 ports, one serial port and one parallel port with ECP and EPP. The D845BG board is equiped with six PCI slots while the D845PT board has three PCI slots. Both boards have four USB 1.1 ports to the back panel, two to the front pannel connector and one to the optional CNR port. The D845BGSE board offers Hi-Speed USB 2.0 support with up to 4 ports, two ports routed to the back panel, two routed to the front panel header, and USB 1.1 routed to the optional CNR.

Note:The last PCI slot and optional CNR slot are shared and cannot be used simultaneously.

Operating System

Only the latest Microsoft operating system versions support the D845BG and D845PT boards' ease of use, USB expansion, and power management features. Specifically, Windows* 98 Second Edition, Windows Millennium Edition, Windows 2000 and Windows XP can be used with the D845BG and D845PT boards.