SK Hynix 128GB 2S2Rx4 DDR5-4800B PC5-38400 ECC Registered Memory HMCT04AEERA131N

The SK Hynix HMCT04AEERA131N is a high-density 128GB DDR5 Registered memory module designed for mission-critical enterprise workloads. Built for next-generation server platforms, it delivers exceptional bandwidth, improved power efficiency, and enhanced reliability for data-intensive applications such as virtualization, AI/ML, and large-scale database environments.

• Capacity: 128GB (1 x 128GB module)
• Memory Technology: DDR5 SDRAM
• Speed: 4800MHz (DDR5-4800 / PC5-38400)
• Form Factor: 288-pin RDIMM (Registered DIMM)
• Data Integrity: ECC (Error-Correcting Code)
• Voltage: 1.1V
• CAS Latency: CL46
• Rank Structure: 4Rx4 (Quad Rank x4)

• High Performance:
  DDR5 architecture with dual independent 32-bit channels per DIMM improves bandwidth and reduces latency under heavy workloads
• Enterprise Reliability:
  On-die ECC and registered buffering enhance signal integrity and system stability
• Power Efficiency:
  Integrated PMIC (Power Management IC) enables better voltage regulation and lower power consumption
• Thermal Optimization:
  Designed for efficient heat management in dense server environments
• Ideal Use Cases:
  Virtualization clusters, AI/ML training, financial modeling, and large-scale data analytics

The HMCT04AEERA131N is a standard 128GB DDR5-4800 RDIMM used across multiple major server platforms. Below are the equivalent part numbers and compatible systems.

Dell Technologies

• Compatible Systems: PowerEdge R660, R760, T660
• Equivalent Part Numbers: AC449974, AC529151, AC517142

Supermicro

• Platforms: X13 (Intel) and H13 (AMD) systems
• Part Numbers: MEM-DR512L-HL01-ER48, MEM-DR512MH-ER48

Cisco Systems

• Platforms: UCS M7 Series (B200 M7, C220 M7, C240 M7)
• Part Number: UCS-MR128G4RE1

Lenovo

• Platforms: ThinkSystem V3 (SR630 V3, SR650 V3)
• Part Number: 03LA113

HPE Compatibility & System Integration

Compatible Server Platforms

These servers are the "host" units for this specific 128GB DDR5 module:

• HPE ProLiant DL380 Gen11: 2U Rack server for scalable data analytics
• HPE ProLiant DL360 Gen11: 1U high-density compute-optimized server
• HPE ProLiant ML350 Gen11: Tower server for branch offices
• HPE Synergy 480 Gen11: Compute module for composable infrastructure

Core System Components

For a complete build, these parts are typically paired with the memory:

• Processors (CPUs):
  Requires 4th or 5th Gen Intel Xeon Scalable processors (e.g., Platinum 8593Q, Gold 6526Y, or Silver 4510)

Large server manufacturers often rebrand the HMCT04AEERA131N under their own internal SKUs. If you are searching for replacements for specific systems, look for these:

• MEM-DR512MH-ER48
• AC529151
• AC517142
• UCS-MR128G4RE1
• P43334-B21
• P48503-001
• P43336-0A1

Third-Party Certified Replacements

These modules meet the same 128GB DDR5-4800 Quad Rank x4 specifications:

• MTC40F2047S1RC64BB1
• HMCT04MEERA-ATC

These equivalent part numbers are commonly included in OEM-certified memory kits and upgrade configurations, ensuring compatibility with vendor-specific firmware, BIOS validation, and enterprise server architectures.