Micron 64GB DDR5-5600 ECC RDIMM 2Rx4 — MTC40F2046S1RC56BD1R (Renesas Register)

The Micron MTC40F2046S1RC56BD1R is a 64GB DDR5-5600 ECC Registered DIMM (RDIMM) in 288-pin form factor operating at 5600MHz (PC5-44800) with CL46 latency at 1.1V. The R suffix denotes the Renesas register component variant of MTC40F2046S1RC56BD1. Configured as Dual Rank x4 it delivers identical specifications to the standard variant for 5th Gen Intel Xeon Scalable and AMD EPYC platforms.

Key Features

• 64GB capacity — DDR5-5600 ECC RDIMM for high-density server memory
• DDR5-5600 (PC5-44800) — high-speed DDR5 server memory
• Renesas register component variant (R suffix)
• ECC Registered — error correction and registered buffer for server reliability
• Dual Rank x4 (2Rx4) — high-density x4 die configuration
• CL46 latency at 1.1V
• 288-pin DIMM — standard server memory form factor

Product Specifications

• Part Number: MTC40F2046S1RC56BD1R
• Manufacturer: Micron
• OEM Status: Genuine Micron
• Base Part: MTC40F2046S1RC56BD1
• Register Vendor: Renesas (R suffix)
• Capacity: 64GB
• Type: DDR5 ECC RDIMM
• Speed: 5600MHz (PC5-44800)
• CAS Latency: CL46
• Voltage: 1.1V
• Ranks x Width: 2Rx4
• Pins: 288-pin

Memory Specifications

• Capacity: 64GB
• DDR Generation: DDR5
• Speed: 5600MHz
• PC Rating: PC5-44800
• CAS Latency: CL46
• Voltage: 1.1V
• ECC: Yes
• Buffered: Registered (RDIMM)
• Rank Configuration: 2Rx4 (Dual Rank x4)
• Form Factor: 288-pin DIMM

Performance Specifications

• Bandwidth: PC5-44800 (44.8 GB/s theoretical)
• On-Die ECC: Yes (DDR5 standard)
• RAS Features: ECC, registered buffer

Use Cases

• High-density server memory builds requiring 64GB per DIMM slot at DDR5-5600
• Virtualization hosts requiring large memory pools per socket
• Database servers and enterprise compute requiring 64GB DDR5 RDIMMs
• AI/ML inference servers requiring high-capacity DDR5 memory
• 5th Gen Intel Xeon Scalable and AMD EPYC DDR5 server platforms

Compatibility

• Compatible with DDR5 RDIMM slots on Intel Xeon Scalable (LGA4677) servers
• Compatible with AMD EPYC (SP5) DDR5 server platforms
• Verify server QVL before installation — some servers may qualify specific register variants
• Not compatible with DDR4 slots or consumer DDR5 platforms

Frequently Asked Questions

What does the R suffix mean in MTC40F2046S1RC56BD1R?

The R suffix indicates this module uses a Renesas register component. The base specifications are identical to MTC40F2046S1RC56BD1 — same capacity speed latency and rank configuration.

Can I mix BD1 and BD1R modules in the same server?

Mixing register component variants is generally not recommended. Check your server vendor QVL to confirm which variants are qualified for your platform.

What is the difference between MTC40F2046S1RC56BD1R and MTC40F2046S1RC64BH1?

MTC40F2046S1RC56BD1R runs at DDR5-5600 while MTC40F2046S1RC64BH1 runs at DDR5-6400. Both are 64GB 2Rx4 ECC RDIMMs — choose based on your server's supported DDR5 speed.

The Micron MTC40F2046S1RC56BD1R delivers 64GB of DDR5-5600 ECC registered server memory in 2Rx4 configuration with Renesas register component — identical specifications to MTC40F2046S1RC56BD1 for Intel Xeon Scalable and AMD EPYC DDR5 server platforms.