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D845PEBT2 architecture of the corporation of Intel

Evgenie Rudometov, Victor Rudometov.

Intel corporation releases the motherboard of Intel D845PEBT2 in which architecture a number of perspective processing techniques is realised. This card created on the basis of a chip set i845PE, is oriented to creation of high-powered computer systems and calculated for support of a wide spectrum of processors of Intel of Pentium 4 and Intel Celeron of NetBurst architecture.


Functionality of computers is substantially defined by possibilities of motherboards. Eventually, productivity depends on operation of these major components. However for the majority of users stability and dependability of operation is priority.

Motherboards of the corporation of Intel became the original measurement standard of these parametres. This corporation in the products realises perspective processing techniques which, as a rule, itself and develops. Further many of these processing techniques become standard for other manufacturers.

One their recently released models the card of Intel D845PEBT2 is. Intel chip set 845PE became a card basis.

Intel chip set 845PE, become, bessomnenija, the most popular set of system logic for processors of NetBurst architecture, such as Intel of Pentium 4 and Intel Celeron.

Being very difficult product created with usage of current technologies, the given chip set possesses the successful architecture and an integration high-scale. It provides not only productivity high level, but implementation of the big number of controllers of peripheral devices, as has been realised by experts in the motherboard of Intel D845PEBT2.


Intel chip set 845PE the motherboard of Intel D845PEBT2


Fig. 1. Structure of the computer created on the basis of a chip set i845EP


Intel chip set 845PE (i845PE) is developed on a basis before the released sets of specialised logic of Intel 845 (i845) and Intel 845Е (i845E). The chip set i845PE is oriented to systems with processors of Intel of Pentium 4 and Intel Celeron of NetBurst architecture with Socket 478 plugs and with clock rate of bus FSB of type QPB of 100 and 133 MHz (Quad-Pumped Bus).

Bus FSB of type QPB at clock rate of 100 MHz carries out data transfer with frequency of 400 MHz, an address part — 200 MHz that capacity to 3,2 Gbytes/with provides peak. At clock rate of 133 MHz data transfer is carried out with frequency of 533 MHz, and an address part — 266 MHz. In this mode peak capacity reaches values of 4,3 Gbytes/with. The bus supports 32-bit addressing that provides to 4 Gbytes of dynamic storage.

Traditionally for line products i8xx the chip set consists of two components named Memory Controller Hub (MCH) and I/O Controller Hub (ICH). For other manufacturers of chip sets similar components are known as North Bridge and South Bridge.

Chips MCH and ICH are jointed by the special local bus which is traditional solution for link of components of chip sets of a series i8xx. This link is carried out by 8-bit wire Hub Link working on frequency of 66 MHz and supporting Hub Interface 1.5. This solution provides a transfer rate of 256 Mb per second.

The MCH component is presented by Intel chip 82845PE. It contains resources of interfaces of operation with the processor, AGP videoadapter, dynamic storage units, and also with chip I/O Controller Hub fulfilling traditional functions South Bridge.

Built in Intel 82845PE the controller of processor bus FSB of type QPB supports the bus with clock rate of 100/133 MHz that provides data transfer on frequencies of 400/533 MHz. It is necessary to mark, that a number of manufacturers of motherboards was released by products on the basis of Intel 82845PE in which operation of the processor bus with clock rate of 200 MHz is supported , that provides data transfer on frequency of 800 MHz and addresses on frequency of 400 MHz.

Built in Intel chip 82845PE the memory controller provides support: memories DDR SDRAM (Double Data Rate SDRAM — SDRAM with data transfer on lobbies and back edges of clock pulses of the bus of memory), DDR266/333, a maximum memory size — to 2 Gbytes, chips 64, 128, 256, 512 Mbit DDR SDRAM, Unbuffered units, unregistered 184 pin without ECC DDR. The maximum transfer rate makes to 2,1/2,7 Gbytes/with at DDR266/333.

The built in controller of a drawing supports one arrangement AGP which can work in modes AGP 2X/4X.

Handle of computer peripheral devices is carried out by the second component of a chip set. Thus it is necessary to mark, that in a chip set i845PE chip ICH of the fourth version is used. According to this fact it has received name ICH4 and is presented by Intel chip 82801DB ICH4. This chip enters into a base set of a chip set i845PE.

The built in resources of a chip of handle of peripheral devices of a base set support: two channels IDE with support ATA 33/66/100 (to four arrangements IDE), three controllers USB 2.0 (six ports), six PCI (32 bits/33 of MHz), LPC (Low Pin Count), AC ' 97 with support of 6 audiochannels (20-bit interface AC-Link), the integrated controller 10/100 Base-TX Ethernet, SMBas, ACPI 2.0, and also other resources and functions.


The main technical parametres of the motherboard of Intel D845PEBT2


Fig. 2. A package of the motherboard of Intel D845PEBT2


Fig. 3. The Motherboard of Intel D845PEBT2


Fig. 4. Plugs of the motherboard of Intel D845PEBT2


The processor

  • Support of processors of Intel of Pentium 4, Intel Celeron with Socket 478 plugs and with FSB QPB 400/533 MHz, support of processing technique Hyper-Threading.

Chip set

  • Intel 82845PE (MCH) / Intel 82801DB (ICH4),
  • It is supported Ultra DMA 100/66/33,
  • Accelerated Graphics Port with support of modes AGP 4X (only 1,5 ).

Dynamic storage

  • Two plugs (184 contact electrodes) for dynamic storage DIMM (unbuffered Non-ECC DIMM), DDR 266 or DDR333, 2,5 In, maximum size — to 2 Gbytes,


  • Integrated 6-channel AC 97 CODEC. (AC ’ 97 Audio with SoundMAX Cadenza)

USB 2.0

  • About 6 ports USB 2.0 with a transfer rate to 480 Mbit/seconds are supported 


  • The integrated network controller 10/100M Ethernet (Intel 82562 ET LAN).

System BIOS

  • 4-Mb Flash EEPROM,
  • Autoconfiguration of IDE-arrangements,
  • Processing technique of Intel Rapid BIOS boot, accelerating POST-test passing (Power On Self Test).

Internal plugs

  • 1 x AGP slot, 5 x PCI slots,
  • 1 x Floppy port (supports arrangements in size to 2,88 Mb),
  • 2 x connector Ultra DMA 100/66/33,
  • 2 x USB 2.0 plug.

External plugs

  • 1 x PS/2 the keyboard, 1 x PS/2 the mouse,
  • 4 x USB 2.0 plug,
  • Network RJ45-LAN plug,
  • 1 parallel port (Parallel),
  • 1 serial port (COM),
  • Audio plugs (Line-In, Mic-In, Line-Out),

Monitoring of hardware,

  • Monitoring of powers and temperatures,
  • Automatic check of rotation of fans.

Form factor

  • ATX.

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