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i865 Chipsets

If the i875 chipset can be viewed as the logical successor to i850E, then its mainstream variant, the i865 chipset – formerly codenamed Springdale – can be viewed as the logical successor to the i845 series of chipsets. Not only do the i875/i865 chipsets represent a huge technological leap compared to their predecessors, but the performance gap between the pair of recent chipsets is significantly less than it was between the i850E and i845 family.

There is a clear trend in PC hardware towards parallel processes, epitomised by Intel’s Hyper-Threading technology. However, there are other examples of where performing several tasks at the same time is preferable to carrying out a single task quickly. Hence the increasing popularity of small RAID arrays and now the trend towards dual-channel memory subsystems.

Currently, there are two different strategies being employed in dual-channel memory controllers, one in which where each memory bank has its own memory channel and an arbiter distributes the load between them and the other to actually create a wider memory channel, thereby doubling up on standard DDR’s 64-bit data paths. In common with the i875P chipset, the i865’s Memory Controller Hub employs the latter, the same conditions for dual-channel operation also applying.

The i865 memory controller is the same as that used by the i875P chipset, supporting:

  • Hyper Threading
  • Dual 64-bit DDR memory channels
  • Communication Streaming Architecture bus for gigabit Ethernet

and capable of being paired with either the ICH5 or ICH5R chip – which handles things like the 10/100 Ethernet interface, 6-channel AC97 audio interface, USB 2.0, the PCI bus, etc., to provide the following additional features:

  • 8 USB 2.0 ports
  • Dual independent Serial ATA ports

The ICH5R also provides software RAID for Serial ATA drives.

The upshot is that – unlike the i875P – i865 chipsets are available in three different versions:

  • i865P: supports DDR266 and DDR333 memory only and doesn’t support the 800MHz FSB.
  • i865PE: as per i865P, plus 800MHz FSB and DDR400 memory support.
  • i865G: as per i865PE, plus Intel’s integrated graphics core.

While the i865G’s graphics core is the same as was featured on the i845G chipset, its performance will be faster, due both to a faster memory subsystem and a higher working frequency of the graphics core itself.

i865PE

The following table compares a number of major characteristics of the i865P chipset with a selection of Intel’s other recent Hyper-Threading chipset offerings:

i865PE i875P E7205 i845PE i850E
Processor Pentium 4 Pentium 4 Pentium 4 Pentium 4 

Celeron

Pentium 4 

Celeron

System Bus (MHz) 800/533/400 800/533/400 533/400 533/400 533/400
Memory Modules 4 DIMMs 4 DIMMs 4 DIMMs 2 double-sided 

DDR DIMMs

4 RIMMs
Memory Type Dual-Channel 

DDR 400/333/266

SDRAM

Dual-Channel 

DDR 400/333/266

SDRAM

unbuffered only 

x72 or x64 DIMMs

DDR SDRAM

DDR 333/266 PC1066 

PC800-40

PC800-45

RDRAM

FSB/Memory 

Configurations

800/400 

800/333

533/333

533/266

400/333

400/266

800/400 

800/333

533/333

533/266

533/266 

400/200

533/333 

533/266

400/266

533/PC1066 

533/PC800-40

400/PC800-45

400/PC800-40

Peak Memory 

Bandwidth

6.4GBps 6.4GBps 4.2GBps 2.7GBps 4.2GBps
Error Correction N/A ECC ECC N/A ECC/Non-ECC
Graphics Interface AGP 8x AGP 8x AGP 8x AGP 4x AGP 4x
Serial ATA 2 ports 

ATA 150

2 ports 

ATA 150

N/A N/A N/A
USB 8 ports 

Hi-Speed

USB 2.0

8 ports 

Hi-Speed

USB 2.0

6 ports 

Hi-Speed

USB 2.0

6 ports 

Hi-Speed

USB 2.0

4 ports 

USB 1.1

  • Intel’s Triton Chipsets Explained – their history, architecture and development
  • Intel 440 Chipsets – 440LX, 440EX, 440BX, 440ZX, 440GX
  • i810 Chipset
  • Intel 820 Chipset
  • i815 Chipsets
  • i850 Chipsets
  • i845 Chipset
  • What is the Intel E7205 Chipset? What Features Does it Have?
  • i875P Chipset
  • i865 Chipsets
  • What is Intel’s 925X PCI Express Chipset
  • i915 Chipset
  • i945 Chipset
  • Intel’s 955X Express Chipset – Glenwood
  • i965 Chipset
  • A Comparison Chart of Intel’s Chipsets from 915P to P965

Filed Under: chipsets Tagged With: i865, i865 Chipsets, intel i865

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