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Dual Channel and Single Channel

Wednesday, April 4, 2012 Posted by Glenn Von Posadas

Dual Channel Interleaved and Single Channel Asymmetric Mode EXPLAINED!


• Dual channel (Interleaved) mode. This mode offers the highest throughput for real world applications. Dual channel mode is enabled when the installed memory capacities of both DIMM channels are equal. Technology and device width can vary from one channel to the other but the installed memory capacity for each channel must be equal. If different speed DIMMs are used between channels, the slowest memory timing will be used.
• Single channel (Asymmetric) mode. This mode is equivalent to single channel bandwidth operation for real world applications. This mode is used when only a single DIMM is installed or the memory capacities are unequal. Technology and device width can vary from one channel to the other. If different speed DIMMs are used between channels, the slowest memory timing will be used.

The following graphics illustrate the memory channel and DIMM configuration.

Note: The DIMM0 sockets of both channels are blue. The DIMM1 sockets of both channels are black.

• Dual Channel (Interleaved) Mode Configurations

This graphic shows a dual channel configuration using two DIMMs. In this example, the DIMM0 (blue) sockets of both channels are populated with identical DIMMs.

Dual Channel (Interleaved) Mode Configuration with Two DIMMs 



This graphic shows a dual channel configuration using three DIMMs. In this example, the combined capacity of the two DIMMs in Channel A equal the capacity of the single DIMM in the DIMM0 (blue) socket of Channel B.

Dual Channel (Interleaved) Mode Configuration with Three DIMMs



This graphic shows a dual channel configuration using four DIMMs. In this example, the combined capacity of the two DIMMs in Channel A equal the combined capacity of the two DIMMs in Channel B. Also, the DIMMs are matched between DIMM0 and DIMM1 of both channels.

Dual Channel (Interleaved) Mode Configuration with Four DIMMs



• Single Channel (Asymmetric) Mode Configurations

This graphic shows a single channel configuration using one DIMM. In this example, only the DIMM0 (blue) socket of Channel A is populated. Channel B is not populated.

Single Channel (Asymmetric) Mode Configuration with One DIMM



This graphic shows a single channel configuration using three DIMMs. In this example, the combined capacity of the two DIMMs in Channel A does not equal the capacity of the single DIMM in the DIMM0 (blue) socket of Channel B.

Single Channel (Asymmetric) Mode Configuration with Three DIMMs



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glenn von

Author: Glenn Posadas

20 year old 5th year Computer Engineering Student, a blogger, photographer, programmer, and an electronics hobbyist; a Christian who loves God very much..

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