How much faster is dual-channel memory compared to single-channel in AIDA64 benchmarks?

Roughly 80-95% faster in read/write/copy tests, with slightly lower latency. Single-channel uses one 64-bit bus, dual-channel uses two, so read speeds jump from ~20GB/s to ~38-40GB/s on typical DDR4-3200. The capacity difference (8GB vs 16GB) barely affects these synthetic scores—it’s almost entirely about channel count.