Performance - System Memory
Performance System Memory: Memory Read Test
So, for memory we had some proper DDR4 DIMMs to work with. These allow for your usual JEDEC frequency but also XMP/BEMP profiles at 2,133 MHz, in the BIOS once you enable the profile, all of a sudden these run at 2,133 MHz / CL15. Combined with a dual-channel configuration.
Above, the memory at an XMP activating 3866 MHz (G.Skill TridentZ)