4 DIMMs on a consumer board means 2 DIMMs per channel. This is inherently a compromise in signal integrity that must come with a speed tradeoff, unfortunately. We’re dealing with laws of physics.
In the past some motherboards tried a T-topology for RAM slots to optimize for 2 DIMMs per channel, but this would cause problems with 1 DIMM per channel usage. Not worth it for the average consumer.
In the past some motherboards tried a T-topology for RAM slots to optimize for 2 DIMMs per channel, but this would cause problems with 1 DIMM per channel usage. Not worth it for the average consumer.