SK Hynix 1x 128GB DDR5-6400 RDIMM PC5-51200R Dual Rank x4 Module

Product Overview

The HMCT04MHBRC is a 128 GB DDR5‑6400 ECC RDIMM, dual‑rank ×4, 1.1 V module from SK Hynix, engineered for the most demanding enterprise server environments. Its exceptional capacity and broad OEM compatibility make it an ideal choice for memory-intensive workloads requiring maximum throughput and reliability.

Do check your server motherboard/BIOS compatibility (particularly with high-density RDIMMs), but otherwise this is a premium pick for virtualisation, in-memory databases, and AI/ML workloads.

This RAM module operates at a standard voltage of 1.1V with a CAS Latency of CL52, and is designed to allow you to run more applications simultaneously, switch between them faster, and provide a smoother computing experience.

Compatibility

You can verify the compatibility of this RAM module in a number of ways:

• Use the RamCity Finder to see all guaranteed compatible RAM upgrades for your brand and model system or motherboard
• Search online to see if this product is on the QVL (Qualified Vendor List) for your system or motherboard
• Contact one of our Upgrade Evangelists for an expert opinion

• Use Cases & Compatibility

  • Target Systems: Designed for enterprise-grade servers and workstations. Compatible with platforms like Intel Xeon and AMD EPYC (e.g., Dell PowerEdge, HPE ProLiant, Lenovo ThinkSystem).

  • Primary Benefits:

    • Ultra-high capacity: 128GB per module enables massive in-system memory with fewer DIMMs, ideal for large-scale virtualisation and in-memory computing.

    • ECC + registered: Ensures data integrity and system stability—ideally suited for mission-critical workloads.

    • x4 chip organization: Common in server memory for balanced performance and cost efficiency.