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  • Note that this is not something that you normally can just enable. If and when you use motherboards that support this feature you typically must install RAM of the same size and type in specific paired slots.
    – slebetman
    Commented Mar 21, 2019 at 9:43
  • 1
    @kloddant Neither RAID-0 (striping), nor multi-channel, nor interleaving decrease amount of available memory, because there is no redundancy (unlike in higher RAIDs).
    – gronostaj
    Commented Mar 21, 2019 at 14:50
  • 1
    This is very low-level and must be implemented directly on RAM modules, right?
    – gronostaj
    Commented Mar 21, 2019 at 14:51
  • 2
    Not RAM modules. Typically these systems use standard RAM available at the time. What's needed is support from the motherboard and depending on the architecture the CPU (older systems with external memory controllers used to use generic CPUs but a lot of modern systems have integrated the memory controller)
    – slebetman
    Commented Mar 22, 2019 at 2:57
  • 2
    @kloddant: No, you still have the total amount of RAM. The hardware just addresses them differently from what the CPU thinks of as memory. For example, the first RAM stick will hold all even addressed data: 0x00000000, 0x00000002, 0x00003284 and another stick will hold all odd addressed data: 0x00000001, 0x00000003, 0x00003285 etc.
    – slebetman
    Commented Mar 22, 2019 at 3:00