Micron 64GB DDR5-6400 ECC RDIMM 2Rx4 — MTC40F2046S1RC64BH1

The Micron MTC40F2046S1RC64BH1 is a 64GB DDR5-6400 ECC Registered DIMM (RDIMM) in 288-pin form factor operating at 6400MHz (PC5-51200) with CL52 latency at 1.1V. Configured as Dual Rank x4 it delivers the highest DDR5 speed tier for server platforms supporting DDR5-6400 on 5th Gen Intel Xeon Scalable and AMD EPYC Genoa platforms requiring maximum memory bandwidth.

Key Features

• 64GB capacity — DDR5-6400 ECC RDIMM for maximum bandwidth
• DDR5-6400 (PC5-51200) — highest standard DDR5 server speed tier
• ECC Registered — error correction and registered buffer for server reliability
• Dual Rank x4 (2Rx4) — high-density x4 die configuration
• CL52 latency at 1.1V
• 288-pin DIMM — standard server memory form factor
• Micron genuine server memory

Product Specifications

• Part Number: MTC40F2046S1RC64BH1
• Manufacturer: Micron
• OEM Status: Genuine Micron
• Capacity: 64GB
• Type: DDR5 ECC RDIMM
• Speed: 6400MHz (PC5-51200)
• CAS Latency: CL52
• Voltage: 1.1V
• Ranks x Width: 2Rx4
• Pins: 288-pin

Memory Specifications

• Capacity: 64GB
• DDR Generation: DDR5
• Speed: 6400MHz
• PC Rating: PC5-51200
• CAS Latency: CL52
• Voltage: 1.1V
• ECC: Yes
• Buffered: Registered (RDIMM)
• Rank Configuration: 2Rx4 (Dual Rank x4)
• Form Factor: 288-pin DIMM

Performance Specifications

• Bandwidth: PC5-51200 (51.2 GB/s theoretical)
• On-Die ECC: Yes (DDR5 standard)
• RAS Features: ECC, registered buffer

Use Cases

• Maximum bandwidth server workloads requiring DDR5-6400 speed
• HPC and AI/ML training requiring highest memory bandwidth per channel
• In-memory analytics and database workloads benefiting from DDR5-6400
• 5th Gen Intel Xeon Scalable platforms supporting DDR5-6400
• AMD EPYC Genoa platforms supporting DDR5-6400

Compatibility

• Compatible with DDR5 RDIMM slots on Intel Xeon Scalable (LGA4677) servers supporting DDR5-6400
• Compatible with AMD EPYC (SP5) DDR5-6400 server platforms
• Verify server QVL before installation — DDR5-6400 requires platform support
• Not compatible with DDR4 slots or consumer DDR5 platforms

Frequently Asked Questions

What is the difference between DDR5-6400 and DDR5-5600?

DDR5-6400 (PC5-51200) provides approximately 14% higher bandwidth than DDR5-5600 (PC5-44800). DDR5-6400 requires server platform support — verify your server's maximum supported DDR5 speed before purchasing.

What is the difference between MTC40F2046S1RC64BH1 and MTC40F2046S1RC56BD1?

MTC40F2046S1RC64BH1 runs at DDR5-6400 (PC5-51200) while MTC40F2046S1RC56BD1 runs at DDR5-5600 (PC5-44800). Both are 64GB 2Rx4 ECC RDIMMs — choose based on your server's supported DDR5 speed.

What does 2Rx4 mean?

2Rx4 means Dual Rank x4 — the DIMM has two ranks of memory chips with x4 (4-bit wide) DRAM devices allowing higher capacity per DIMM.

The Micron MTC40F2046S1RC64BH1 delivers 64GB of DDR5-6400 ECC registered server memory in 2Rx4 configuration — the highest standard DDR5 speed tier for Intel Xeon Scalable and AMD EPYC platforms requiring maximum memory bandwidth.