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DDR3 triple-channel architecture is used in the Intel Core i7-900 series (the Intel Core i7-800 series only support up to dual-channel). The LGA 1366 platform (e.g. Intel X58) supports DDR3 triple-channel, normally 1333 and 1600Mhz, but can run at higher clock speeds on certain motherboards.
For a 64-bit-wide memory data interface, this equates to having 4 ranks, where each rank can be selected by a 2-bit chip select signal. Memory controllers such as the Intel 945 Chipset list the configurations they support: "256-Mib, 512-Mib, and 1-Gib DDR2 technologies for ×8 and ×16 devices", "four ranks for all DDR2 devices up to 512-Mibit ...
DDR4 RAM operates at a voltage of 1.2 V and supports frequencies between 800 and 1600 MHz (DDR4-1600 through DDR4-3200). Compared to DDR3, which operates at 1.5 V with frequencies from 400 to 1067 MHz (DDR3-800 through DDR3-2133), DDR4 offers better performance and energy efficiency .
The number of physical DRAMs depends on their individual widths. For example, a rank of ×8 (8-bit wide) DRAMs would consist of eight physical chips (nine if ECC is supported), but a rank of ×4 (4-bit wide) DRAMs would consist of 16 physical chips (18, if ECC is supported). Multiple ranks can coexist on a single DIMM.
With the introduction of the Intel 840 (Pentium III), Intel 850 (Pentium 4), Intel 860 (Pentium 4 Xeon) chipsets, Intel added support for dual-channel PC-800 RDRAM, doubling bandwidth to 3200 MB/s by increasing the bus width to 32 bits. This was followed in 2002 by the Intel 850E chipset, which introduced PC-1066 RDRAM, increasing total dual ...
Data lines and control connected in parallel to a 16-bit data bus, and only chip selects connected independently per channel. To two halves of a 32-bit wide data bus, and the control lines in parallel, including chip select. To two independent 16-bit wide data buses; Each die provides 4, 6, 8, 12, or 16 gigabits of memory, half to each channel ...
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Infineon/Kingston (a memory vendor) Dual Channel DDR Memory Whitepaper at the Wayback Machine (archived 2011-09-29) – explains dual channel memory controllers, and how to use them; Introduction to Memory Controller; Intel guide on Single- and Multichannel Memory Modes [dead link ] What is a Memory Controller and How Does it Work
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3579 S High St, Columbus, OH · Directions · (614) 409-0683