This usually results in better performance for CPU-intensive applications since it reduces memory response times.

Memory runs in dual ranked mode which enables rank interleaving.

However this time the CPU needs to access two DIMM slots per channel.

Memory still runs in dual channel mode so the CPU gets double the bandwidth per memory channel (128-bit wide versus 64-bit wide).

Possibly due to better signal integrity, less interference, or the copper trace paths on the DIMM slots is using daisy chain topology which is more optimized for two DIMM usage.įour DIMM slots occupied (example: 4x8GB) Motherboard can support higher memory speeds with only two DIMM slots occupied.Sometimes the CPU can run stable with higher memory speeds, but still depends on the silicon lottery. Less load or less stress on the CPU's integrated memory controller (or IMC).Memory runs in dual channel mode so the CPU gets double the bandwidth per memory channel (128-bit wide versus 64-bit wide).

So two DIMM's for channel A, and two DIMM's for channel B.

Your motherboard supports two DIMM's per memory channel only.

Your CPU supports dual channel memory only.

You are using single ranked DDR4 memory like 8GB per memory stick.

Which dimm slot for single ram