[Memory]How to make use Dual Channel

Some memory controllers provide a dual channel for memory. The aim is to use the memory modules in pairs and combining it to the bandwidth and thus maximizing the capacity of the system. Note it is recommended that, when using Dual Channel, make use of identical memory sticks in pairs (frequency, capacity, of the same brand if possible)


Memory locations are noted as indicated below:

Dual Channel: [A1-A2] and/or [B1-B2]

• A1 = 1st place (slot 1)
• B1 = 2nd place (slot 2)
• A2 = 3rd place (slot 3)
• B2 = 4th place (slot 4)
• *[A1-B1] = Group 1 on the motherboard.
• *[A2-B2] = Group 2 on the motherboard.
• It is possible to use Dual Channel memory with memory sticks having the following frequencies: DDR1600, 2100, 2700, 3200 and those having a higher frequency.
  • When using a single RAM stick then location A1 must be configured in single channel mode.
  • When using 2 RAM stick of different brands then locations A1 and B1 must be configured in single channel mode.

To enable dual channel mode, it is necessary to use 2 RAM stick (having same brand, same size, and same frequency) in A1 and A2 slots.

If you want to use 3 RAM stick of different brands, it is necessary to use 2 bars identical in the first group (A1 and A2) and the last one, of any other brand but with the same frequency on the location B1.

Finally, if you want to install a 4th memory stick on the slot B2, it is necessary to use a memory stick similar to the one on B1.

On motherboards having both 2 DDR2 ports and 2 DDR ports, only DDR2 ports can be used for Dual-Channel.

Note that: this manipulation can be considered as an inexpensive update , increasing the life span of your PC.