ASUS - RS500A-E9-RS4 Server

Using Registered DIMMs (RDIMMs):

Configurations up to 512GB can be reached using Kingston's 8, 16, and 32GB modules IN GROUPS OF EIGHT.
Using Load Reduced DIMMs (LRDIMM):

Configurations up to 1TB can be reached using Kingston's 64GB modules IN GROUPS OF EIGHT.

MODULES MUST BE ORDERED AND INSTALLED IN GROUPS OF EIGHT FOR MAXIMUM MEMORY PERFORMANCE.
AMD EPYC 7000 processor models featuring 180W and 170W TDP are required to support DDR4-2666. Mid (155W) and low end (120W) model EPYC processors only support up to DDR4-2400.
Kingston memory will clock down to run at optimal speed depending on processor model and number/type of modules installed.
Per AMD the following speeds are supported per DIMM type and configuration:
1R (Single Rank) DIMMs at 2666 in 1DPC (1 DIMM per Channel)
2R (Dual Rank) DIMMs at 2400 in 1DPC (1 DIMM per Channel)
4R (Quad Rank) LRDIMMs at 2666 in 1DPC (1 DIMM per Channel)
1R (Single Rank) DIMMs at 2133 in 2DPC (2 DIMMs per Channel)
2R (Dual Rank) DIMMs at 2133 in 2DPC (2 DIMMs per Channel)

2R (Dual Rank) + 1R (Single Rank) DIMMs at 1866 in 2DPC (2 DIMMs per Channel)
4R (Quad Rank) LRDIMMs at 2133 in 2DPC (2 DIMMs per Channel)
Please refer to the manual for additional configuration information.
Please note specific board revision and/or BIOS/firmware upgrade maybe required to utilize the following parts that use 16Gbit technology:
KSMxxRD4/64xxx
KSMxxRS4/32xxx
KSMxxRD8/32xxx
KSMxxRS8/16xxx
Please refer to system documentation.