Kingston 64GB DDR5-5600 ECC Registered RDIMM for Enterprise Servers

The Kingston KSM56R46BD4PMI-64MDI is a 64GB DDR5-5600 (PC5-44800) ECC Registered DIMM with CL46 latency, 1.1V operation, and dual rank x4 organization — a Micron-die RDIMM engineered for high-density DDR5 server memory configurations in Intel Xeon Scalable 4th/5th generation and AMD EPYC platforms supporting DDR5 RDIMM.

Key Features

• 64GB DDR5-5600 ECC Registered — high-density server RDIMM for maximum per-slot capacity
• Micron DRAM die (PMI suffix) — Kingston-selected Micron die for validated server platform compatibility
• Dual rank x4 (2Rx4) organization for full memory bandwidth utilization per channel
• 1.1V DDR5 low-voltage for energy-efficient high-density server memory
• Kingston server-grade validation for Intel Xeon Scalable Gen 4/5 and AMD EPYC DDR5 platforms

Product Specifications

• Part Number: KSM56R46BD4PMI-64MDI
• Manufacturer: Kingston
• Capacity: 64GB
• Type: DDR5 ECC RDIMM (Registered)
• Speed: 5600MHz (PC5-44800)
• CAS Latency: CL46
• Voltage: 1.1V
• Pins: 288-pin

Memory Specifications

• Ranks x Width: 2Rx4 (Dual Rank x4)
• DRAM Die: Micron (PMI)
• ECC: Yes (system-level ECC + DDR5 on-die ECC)
• Registered: Yes (RDIMM — buffered register)
• JEDEC Compliant: DDR5-5600 JEDEC standard

Performance Specifications

• Peak Bandwidth: ~89.6 GB/s (dual-channel at 5600MHz)
• 2Rx4 Advantage: Full x72 ECC bus width with dual-rank interleaving for sustained throughput
• Timing: 46-45-45
• On-Die ECC: Yes (DDR5 native)

Use Cases

• High-density DDR5 server memory for Intel Xeon Scalable 4th Gen (Sapphire Rapids) and 5th Gen (Emerald Rapids)
• AMD EPYC Genoa/Bergamo server memory expansion at maximum 64GB per slot density
• Enterprise virtualization hosts requiring maximum DDR5 RDIMM capacity per socket
• Memory-intensive database and in-memory analytics servers on DDR5 platforms

Compatibility

• Compatible with Intel Xeon Scalable 4th/5th Gen servers supporting DDR5-5600 RDIMM
• Compatible with AMD EPYC Genoa and Bergamo platforms supporting DDR5 RDIMM
• Micron die — verify server QVL for die-specific RDIMM compatibility requirements
• Not compatible with DDR5 UDIMM or DDR4 RDIMM server platforms

Frequently Asked Questions

What does the PMI suffix in KSM56R46BD4PMI-64MDI mean?

The PMI suffix indicates the RDIMM uses Micron DRAM dies. Some server platforms specify preferred or required DRAM die vendors on their QVL — the PMI designation allows customers to select Micron-die RDIMMs when their server's compatibility list specifies Micron.

What is the difference between KSM56R46BD4PMI-64MDI and KSM56R46BD4PMI-64HAI?

Both are 64GB DDR5-5600 ECC Registered 2Rx4 DIMMs with Micron dies, but the MDI and HAI suffixes denote different production batches or binning variants in Kingston's server RDIMM lineup. Both are functionally equivalent for supported DDR5 server platforms.

Why choose 2Rx4 over 2Rx8 at 64GB?

At 64GB, a 2Rx4 configuration uses higher-density DRAM chips with a x4 data bus width per chip, enabling higher capacity without increasing rank count. This maintains full ECC bus width and rank-level interleaving performance at maximum DIMM capacity.

The Kingston KSM56R46BD4PMI-64MDI provides 64GB of Micron-die DDR5-5600 ECC Registered server memory — delivering the per-slot density, dual-rank bandwidth, and Micron DRAM transparency that enterprise DDR5 server platforms demand for maximum memory capacity and validated compatibility.