Se você tiver apenas um módulo de RAM, não poderá usar a Memória de canal duplo.
Dual-channel architecture requires a dual-channel-capable motherboard and two or more DDR, DDR2, DDR3, or DDR4 memory modules. The memory modules are installed into matching banks, which are usually color-coded on the motherboard. These separate channels allow the memory controller access to each memory module. It is not required that identical modules be used (if motherboard supports it), but this is often recommended for best dual-channel operation.