Intel D875PBZ: the architecture and productivity

For a synchronous functional mode of memory DDR400 and frequency of the bus of 800 MHz probably usage of the mode providing raised productivity of a subsystem of memory, — processing techniques of Intel PAT (Performance Acceleration Technology). In this mode the delays linked to synchronisation are minimised.

The built in controller of a drawing supports one arrangement 0,8/1,5 In AGP 3.0, working in modes AGP 8х/4x.

From features of hub MCH it is necessary to mark, that in its architecture the special interface is provided, allowing to realise Gigabit Ethernet. Carrying over of these resources from ICH in MCH speaks insufficient capacity of the local bus jointing hubs MCH and ICH.

Handle of computer peripheral devices carries out the second component of a chip set. By the way, it is necessary to mark, that in a chip set i875P chip ICH of the fifth version according to what it has received name ICH5 is used and presented by Intel chip 82801ЕB. This chip enters into a base set of a chip set i875P.

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), two ports Serial ATA 150, eight ports USB 2.0, six PCI (32 bits/33 of MHz), LPC (Low Pin Count), AC ' 97 with support of three codecs of the audiochannels, integrated controller Ethernet 10/100 Base-TX, SMBas, ACPI 2.0, and also other resources and functions.

Except Intel 82801ЕB, usage of the expanded version of hub ICH5 — ICH5R is possible . This expanded variant is presented by Intel chip 82801ЕR which differs from the predecessor function RAID of level 0.

Two patterns of the motherboard of Intel D875PBZ are possible. They differ the built in audioresources: in one variant of the card delivered to partners of corporation of Intel, there is a built in 6-channel audiosubsystem with codec Flex ADI 1985, in other variant it is absent.

Fig. 2. The Motherboard of Intel D875PBZ

 

Fig. 3. Plugs of the motherboard of Intel D875PBZ

The processor

• Support of processors of Intel of Pentium 4 with processing technique Hyper-Threading with the bus of 800 MHz or 533 MHz in 478-contact tank mPGA;
• Support of processors of Intel of Pentium 4 with the bus of 533 MHz in 478-contact tank mPGA.

• Intel 82875P (MCH) / Intel 82801EB (ICH5R) / Intel 82802AC (FWH);
• Two ports Serial ATA 150 c support of Intel RAID 0;
• Ultra ATA 100/66 protocol;
• Five PCI plugs;
• Power management ACPI 1.0b;
• Correspondence of specification PC2001.

• Four plugs (184 contact electrodes) for dynamic storage DIMM, DDR 400 or DDR333, 2,5 In, mode ECC, maximum size — to 4 Gbytes is supported  ;
• Support of one or two channels of dynamic storage.

• Six ports on a backboard (one schetverennyj and one dual plug);
• Two ports on the front panel (a contact block for output to the front panel).

• One general-purpose size 1,5 or 0,8 In AGP 3.0 with support of mode AGP 8X.

Audio

• Audiosubsystem of standard Flex 6 on the basis of company Analog Devices codec AD1985 (under the order).

• Integrated network controller Gigabit Ethernet (with the CSA-interface).

• 8 Mбит Flash EEPROM with Intel/AMI BIOS;
• Autoconfiguration of IDE-arrangements;
• Processing technique of Intel Rapid BIOS boot, accelerating POST-test passing (Power On Self Test).

• One AGP slot, five PCI slots;
• One Floppy port (supports arrangements in size to 2,88 Mb);
• Two connectors Ultra DMA 100/66/33;
• Two connectors Serial ATA 150;
• Two USB 2.0 plugs.

External plugs

• PS/2 The keyboard and PS/2 the mouse;
• Six USB 2.0 plugs;
• One network RJ45-LAN plug;
• One parallel port (Parallel);
• One serial port (COM);
• Audioplugs (Line-In, Mic-In, Line-Out).

• Monitoring of powers and temperatures;
• Automatic check of rotation of fans (Intel Precision Cooling).

• ATX 2.30;
• The sizes 23,75x24 see

Into package structure enter:

• Box;
• The motherboard of Intel D875PBZ;
• The cover plate of input/output corresponding to specification ATX;
• The quick reference guide of the user in English;
• Cable for hooking up ATA66/100/133, cables Serial ATA and a loop for hooking up of the flexible drive;
• Compact disc with the software of Intel Express Installer on which are written the user manual, and also anti-virus package Norton Internet Security, the utility of Intel Active Monitor, ON RestoreIT! Lite, ON Diskeeper Lite, player RealONE Player and other software.

The motherboard is created according to referens-design which is developed traditionally by the manufacturer of a chip set, in this case Intel-company.

The processor of Intel of Pentium 4 with clock rate of 3,0 GHz, calculated for operation with the bus which transmission frequency of data makes 800 MHz, is supplied by the heat sink with radial layout of edges. Taking into account high teplotvornoj abilities of such products, in the heat sink underplate the interposing from copper is built in.

 

Fig. 5. The Underside of a processor cooler

 

Fig. 6. A chip of handle of peripheral devices (ICH5R) and Serial ATA plugs (these plugs are marked on a photo)

The motherboard of Intel В875PBZ is oriented to application in high-powered systems. Usage of processors of Intel of Pentium 4 with processing technique Hyper-Threading and the bus of 800 MHz providing reaching of a maximum level of productivity therefore is recommended  . However usage and less efficient models is possible. It can be, for example, the processors calculated for the bus of 533 MHz and even of 400 MHz. Thus together with the motherboard of Intel В875PBZ application of models and without support of processing technique Hyper-Threading is possible.

The functional mode of memory modules DDR SDRAM can be one-channel (3,2 Gbytes/c) or two-channel (6,4 Gbytes/c). The two-channel mode allows to receive completely depthbalanced system in the event that pass-bands of the processor bus and the memory bus coincide and make equal values — 6,4 Gbytes/with. Thus operation of memory modules DDR SDRAM can be or synchronous — clock rate coincides with frequency FSB, or asynchronous — clock rate differs from frequency FSB. It is set in BIOS Setup — SDRAM Frequency.

In BIOS Setup customisation tajmingov dynamic storage units is possible: CAS Latency, RAS Active To Precharge, RAS to CAS Delay, RAS Precharge, that allows to reach maximum productivity of a subsystem of dynamic storage.

In case of a synchronous mode for frequency of the bus of 800 MHz and memory modules DDR400 usage of the mode providing raised productivity of a subsystem of memory is possible. This firm processing technique carries the name “Processing technique of Intel PAT” (Performance Acceleration Technology). The idea laying in its basis, consists in an expedition of passing of data through MCH at the expense of refusal superfluous in this case synchronisations. Thus will not be involved superfluous sinhronizatsionnye bufery in a chip set, and data are handled directly. By estimations of experts of Intel, the reached scoring makes 2-5 %.

From features of the architecture it is necessary to mark presence of the controller of the sound realised on the basis of chip set Analog Devices AD1980. It provides possibility of hooking up of audiosystems 5.1.

Cредствами a chip set the mode of Intel RAID 0 (only for the operating system of Windows XP) is supported  . It is realised by means of two ports Serial ATA 150.

The network controller Gigabit Ethernet realised on a chip of Intel 82547EI is built in the motherboard architecture (Kenai II CSA — Gigabit Ethernet). This controller is hooked up by means of the interface of Intel Communication Streaming Architecture to hub MCH. The given integrated network tools allow to include easily the computer through built in RJ-45 plug in local area network structure.

In a two-channel impulse surge protector of the processor four capacitors on 2200 mkf, ten on 1200 mkf and some less capacious capacitors are applied. By the way, it is necessary to mark, usually in motherboards fourline converters use three-and even. But the implementator of standards VRM — Intel corporation, as well as in a number of the previous motherboards, has considered sufficient for the new product two-channel solution. The held testing has shown, that application of a two-channel variant is justified and provides a system quiescent operation.

Fig. 7. VRM the motherboard of Intel D875PBZ

The power +5 In in mode Standby is displayed by a light-emitting diode on the motherboard.

In the architecture of the motherboard of Intel D875PBZ possibilities of the hardware monitoring providing the control over supply voltages and operation of cooling fans are used. Thus in the given card, as well as, for example, in Intel D875PBT2, autocontrol of the fan which is responsible for temperature in a system unit is realised. It became possible thanks to processing technique of Intel Precision Cooling.

From other features of the motherboard of Intel D875PBZ it is necessary to mark firm processing technique of fast loading of Intel Rapid BIOS boot. The given processing technique meets practically in all motherboards of Intel.

One more feature — application, as well as in the motherboard of Intel D875PBT2, the forced modes — dispersal (overclocking). A band of change of clock rate:-2 % of,-1 %, +1 %, +2 %, +3 %, +4 % from frequency rating value. This mode is named Burn-In Mode. Presence of the given mode is taken up a position by the company of Intel for usage by the experts experimenting various functional modes of system, differing productivity, teploobrazovaniem, stability.

In testing two systems used.

Complete set of system 1:

• The processor of Intel of Pentium 4 (kernel Northwood, processing technique 0,13 microns, a transmission frequency of data of the processor bus — 800 MHz, kesh-memory L2 — 512 Kbytes, Socket 478 plug ) with clock rate of 3,0 GHz;
• Two units of dynamic storage DDR400 on 256 Mb;
• The motherboard of Intel D845PBZ (i875P);
• Abit Siluro GeForce4 Ti4200 OTES videoadapter (128 Mb DDR SDRAM, frequency GPU — 275 MHz, a video memory — 550 MHz);
• IBM hard disk 180GXP 120 Gbytes (2 Mb of kesh-memory, 7200 rpm);
• OS OF WINDOWS XP Professional, Service Pack 1.

Complete set of system 2:

• The processor of Intel of Pentium 4 (kernel Northwood, processing technique 0,13 microns, a transmission frequency of data of the processor bus — 533 MHz, kesh-memory L2 — 512 Kbytes, Socket 478 plug ) with clock rate of 3,06 GHz;
• The unit of dynamic storage DDR266 in size of 512 Mb;
• The motherboard of Intel D845PBT2 (i845PE);
• Abit Siluro GeForce4 Ti4200 OTES videoadapter (128 Mb DDR SDRAM, frequency GPU — 275 MHz, a video memory — 550 MHz),
• IBM hard disk 180GXP 120 Gbytes (2 Mb of kesh-memory, 7200 rpm);
• OS OF WINDOWS XP Professional, Service Pack 1.

Productivity metrics in the test 3DMark 2001 SE Pro

Productivity metrics in test CPUmark 99

Productivity metrics in test SiSoft Sandra (Memory Bandwidth Benchmark)

As to an estimation of the main operation parametres of the described motherboard, it is necessary to mark: at performance of numerous, durable tests the card of Intel D875PBZ worked steadily.

The high-powered card of Intel D875PBZ can be recommended a wide range of users which possibilities of extremal modes of dispersal do not interest and which prefer productivity, dependability and stability of operation.