Technical Snapshot

The Micron 128GB DDR5-6400 RDIMM 2Rx4 is a server-grade DDR5 RDIMM memory module designed for enterprise servers and workstations. Running at 6,400 MT/s with CL52 timings at 1.1V, The module provides 128GB of DDR5 memory . Backed by a limited lifetime warranty, this module targets server deployments, virtualization hosts, and high-availability computing environments requiring ECC error correction.

Use Case
Server deployments, virtualization, high-availability computing
Compatibility
RDIMM-compatible server motherboard
Category
DDR5 RDIMM — Micron DDR5 RDIMM
MICRON
Micron RAM
Micron DDR5 RDIMM

Micron 128GB DDR5-6400 RDIMM 2Rx4 (MTC40F2047S1RC64BR)

DDR5 · RDIMM · 6,400 MT/s · 128GB

Memory transfer rate in megatransfers per second. Higher MT/s provides more bandwidth for CPU-bound workloads.
Speed 6,400 MT/s
Total kit capacity across all modules. Dual-channel kits double memory bandwidth.
Capacity 128GB
CAS Latency — the delay between a memory access request and data availability.
Latency CL52
Operating voltage. Higher voltage allows faster speeds but increases power and heat.
Voltage 1.1V
MPNMTC40F2047S1RC64BR
EAN649528942913
CategoryMemory
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Memory Specifications

Memory TypeDDR5
Form FactorRDIMM
Total Capacity128GB
Speed6,400 MT/s
CAS LatencyCL52
Voltage1.1V
ECCYes
Warrantylimited lifetime

Full Specifications

Data sourced from Micron product specifications
Memory
Product LineDDR5 RDIMM
Memory TypeDDR5
Form FactorRDIMM
Total Capacity128GB
Module Count1
Module Capacity128GB
Speed6,400 MT/s
Timings & Voltage
CAS LatencyCL52
Voltage1.1V
ECCYes
Product
BrandMicron
MPNMTC40F2047S1RC64BR
EAN649528942913
Warrantylimited lifetime
Physical
Weight0.045 kg
Package Dimensions37.47 x 30.48 x 9.53 cm

Support

Micron Memory Compatibility ToolCheck motherboard compatibility for this module
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Micron 128GB DDR5-6400 RDIMM 2Rx4 DatasheetPDF · Technical specifications
Micron Support →
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Frequently Asked Questions

What systems is this memory compatible with?

The Micron 128GB DDR5-6400 RDIMM 2Rx4 is RDIMM server memory with ECC error correction. It requires a server or workstation motherboard with RDIMM support. NOT compatible with standard desktop motherboards. Check your server's QVL (Qualified Vendor List) for compatibility.

What speed does this memory run at?

The Micron 128GB DDR5-6400 RDIMM 2Rx4 runs at 6,400 MT/s with CL52 timings. This is a JEDEC standard speed that works automatically without BIOS configuration.

Can I add more memory later?

Yes, the Micron 128GB DDR5-6400 RDIMM 2Rx4 is a single 128GB module. You can add additional compatible DDR5 RDIMM modules to populate empty slots. For best performance, use matched modules of the same speed and capacity to enable dual-channel mode.

Does this memory support ECC error correction?

Yes, the Micron 128GB DDR5-6400 RDIMM 2Rx4 includes ECC (Error-Correcting Code) support, which detects and corrects single-bit memory errors. This is essential for servers, workstations, and mission-critical applications where data integrity is paramount.

What warranty does this memory come with?

The Micron 128GB DDR5-6400 RDIMM 2Rx4 comes with a limited lifetime warranty from Micron.

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MPN: MTC40F2047S1RC64BR
Schemas: Product + BreadcrumbList
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Related: 4 isRelatedTo links