post #11 of 11
No.... that's not actually how dual channel works.
Have a look at the 2003 intel spec sheets regarding dual channel operation (note that this spec sheet was released before the advent of Flex Memory with the 965 chipset - see link to spec sheet). By your logic, each channel runs a pair of DIMMs - this is wrong and the opposite actually. In dual channel, a pair of DIMMs is split over the two channels, creating two pathways to the memory controller as opposed to one, for more efficient memory access.

For the best dual-channel memory performance on motherboards with the Intel dual-channel DDR chipsets, you must use identically paired memory modules in DIMM sockets 0 of channel A and B. Identically paired memory modules must also be used when populating DIMM sockets 1 of channel A and B. One can, for example, plug in matching 256MB DIMMs in both DIMM 0 slots, and plug in matching 512MB DIMMs in both DIMM 1 slots.
In this context, “matching” modules means:
1. Both modules are the same capacity (e.g. both are 256MB, or 512MB)
2. Both modules are the same speed (e.g. both are PC2700 or PC3200)
3. Both have the same number of chips and module sides (e.g. both have the same number of chips on the module, and both are either single-sided or double-sided).
2x2GB in DIMM 0 slots and 2x4GB in DIMM 1 slots will run in full dual channel mode. No asymmetrical operation. Each channel recognizes 2GB + 4GB (6GB) of memory.
Edited by xd_1771 - 8/19/11 at 12:28pm