I have an Asus Maximus VIII Ranger motherboard, which has four RAM slots. The slot configuration is same as in this image:
Currently I have installed one stick of 8 GB capacity and 3000 MHz speed in the DIMM 1 slot and I'm looking to upgrade my RAM, and want to make use of dual channel configuration.
While researching about dual channel behaviour, I read this https://www-ssl.intel.com/content/www/us/en/support/boards-and-kits/000005657.html#dual and got a little confused when I saw the second image (Dual-channel with three DIMMs).
Is it that the DIMMs in slots 1 and 2 are operating in dual channel mode and the 4 GB DIMM in slot 3 is operating in single channel mode, or is it that DIMMs 1 and 2 are operating together with DIMM 3 in dual channel mode? In other words, is it [2 GB] matching with [2 GB] and the [4 GB] stick could have been of any other capacity, or is dual channel working here because it's [2 GB + 2GB] matching with [4 GB]?