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:...

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