Hynix 128GB 4800MHz DDR5 PC5-38400 ECC Registered CL40 288-Pin DIMM 1.1V Quad Rank x4 Memory Module – HMCT04AEERA131N

SK Hynix 128GB DDR5-4800MHz PC5-38400 ECC Registered CL40 288-Pin DIMM 1.1V Quad Rank x4 Memory Module — HMCT04AEERA131N

The SK Hynix HMCT04AEERA131N is a 128GB DDR5-4800MHz ECC Registered (RDIMM) server memory module operating at 1.1V with CL40 latency. Featuring a 288-pin DDR5 interface and Quad Rank x4 (4Rx4) configuration, it delivers maximum-capacity enterprise-grade ECC error correction for Intel Xeon Scalable (Sapphire Rapids) and AMD EPYC (Genoa) server platforms requiring DDR5-4800 registered memory at 128GB per slot density. HMCT04AEERA131N is a production variant of the SK Hynix 128GB DDR5-4800 4Rx4 RDIMM family.

Key Features

• 128GB maximum-capacity DDR5-4800MHz ECC Registered DIMM for enterprise servers
• DDR5-4800MHz (PC5-38400) for high-bandwidth DDR5 server memory performance
• Registered DIMM (RDIMM) for stability in multi-DIMM DDR5 server configurations
• Quad Rank x4 (4Rx4) for maximum per-slot DDR5 capacity
• 1.1V operation — lower voltage than DDR4 for improved energy efficiency
• 288-pin DDR5 interface — next-generation server memory form factor

Product Specifications

• Part Number: HMCT04AEERA131N
• Manufacturer: SK Hynix
• OEM Status: Genuine SK Hynix OEM
• Capacity: 128GB
• Type: DDR5 ECC Registered DIMM (RDIMM)
• Speed: 4800MHz (PC5-38400)
• CAS Latency: CL40
• Voltage: 1.1V
• Rank / Organization: Quad Rank x4 (4Rx4)
• Pins: 288-Pin
• ECC: Yes

Memory Specifications

• Capacity: 128GB
• DIMM Type: Registered ECC (RDIMM)
• DDR Generation: DDR5
• Pin Count: 288-Pin
• Rank: Quad Rank (4Rx4)
• Voltage: 1.1V
• ECC: Yes (Error-Correcting Code)
• On-Die ECC: Yes (DDR5 native)

Performance Specifications

• Speed: DDR5-4800MHz
• Bandwidth: PC5-38400
• CAS Latency: CL40
• XMP / JEDEC: JEDEC standard

Use Cases

• Maximum-capacity DDR5 enterprise server memory for Intel Xeon Scalable (Sapphire Rapids) platforms
• AMD EPYC (Genoa) server memory requiring 128GB DDR5-4800 RDIMM per slot
• Virtualization hosts requiring maximum DDR5 memory capacity
• In-memory database and AI workloads requiring maximum DDR5 density

Compatibility

• Compatible with servers supporting DDR5-4800 ECC Registered (RDIMM) 4Rx4 memory
• Compatible with Intel Xeon Scalable (Sapphire Rapids) and AMD EPYC (Genoa) platforms supporting 128GB RDIMM
• Functionally equivalent to HMCT04MEERA131N variant
• Not compatible with DDR4 systems — DDR5 requires DDR5-capable platforms
• Verify server QVL (Qualified Vendor List) before ordering — 4Rx4 128GB support varies by platform

Frequently Asked Questions

What is the difference between HMCT04AEERA131N and HMCT04MEERA131N?

Both are SK Hynix 128GB DDR5-4800 ECC RDIMM 4Rx4 modules with identical specifications. AEERA and MEERA are different production variant designations — they are functionally equivalent.

Is HMCT04AEERA131N compatible with Intel Xeon Sapphire Rapids?

Yes, it is compatible with Intel Xeon Scalable Sapphire Rapids server platforms supporting DDR5-4800 ECC RDIMM 4Rx4. Verify your specific server”s QVL for 128GB DDR5 RDIMM support before ordering.

What is Quad Rank x4 (4Rx4) DDR5 memory?

Quad Rank x4 (4Rx4) means the module has four ranks of memory chips, each using x4-wide chips. This enables maximum per-slot capacity (128GB) in DDR5 but requires server platform support for 4-rank DDR5 RDIMMs.

The SK Hynix HMCT04AEERA131N 128GB DDR5-4800 ECC Registered DIMM delivers maximum-capacity next-generation server memory for Sapphire Rapids and EPYC Genoa platforms. Order today for genuine SK Hynix DDR5 RDIMM quality.