SK Hynix 32GB DDR5-6400 RDIMM Server Memory

Brand: SK Hynix | Category: Memory (RAM)

SKU: HMCG74MEBRA109N | Part #: HMCG74MEBRA109N | MPN: HMCG74MEBRA109N

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When your data centre runs high-frequency trading systems, real-time analytics engines, or in-memory databases, memory latency and stability become non-negotiable infrastructure concerns. The SK Hynix HMCG74MEBRA109N — a 32GB DDR5-6400 RDIMM — operates at CL46 with a conservative 1.1V supply, a combination that reflects SK Hynix's engineering philosophy: favour stability and longevity over marginal speed gains that require voltage creep. For latency-sensitive workloads running on Sapphire Rapids or Genoa platforms, this voltage-to-frequency ratio matters because it directly influences DIMM reliability across multi-year deployment cycles and reduces the thermal load on the registered buffer and on-module power management infrastructure.

SK Hynix built this module with Registered DIMM architecture (hence the RDIMM designation), which means a generation-2 register clock driver sits between your processor and the DRAM cells. This adds a single clock cycle to address and command signals—a trade-off that stabilizes large-capacity memory subsystems in server environments where CPU socket density and per-socket memory capacity continue to climb. The HMCG74MEBRA109N arrives with 2Rx4 rank configuration (dual rank, by-4), giving your system architect flexibility in populating DIMM slots while maintaining balanced electrical loading across the memory bus. SK Hynix paired this with full JEDEC DDR5 compliance, dual-channel ECC (on-die and via the registered buffer), and an on-module PMIC that handles dynamic voltage and frequency adjustments—a standard DDR5 feature that reduces load on the motherboard's power delivery network.

Server administrators and data-centre infrastructure teams responsible for Xeon or EPYC platforms evaluate memory not just on capacity, but on how predictably it performs under sustained load. The SK Hynix HMCG74MEBRA109N's 288-pin form factor and 72-bit width (including ECC) fit the RDIMM standard that has dominated enterprise deployments since the DDR3 era. Its operating range spans 0°C to 85°C, which aligns with typical data-centre thermals; the on-module PMIC continuously monitors voltage droop and frequency stability, reducing the chance of unplanned DIMM-induced downtime. For storage architects designing all-flash arrays with NVMe backends, or AI infrastructure teams provisioning systems with large transformer model weights, this particular SK Hynix module—with its part number HMCG74MEBRA109N—sits in the performance-per-watt sweet spot: fast enough for sub-microsecond latency requirements, conservative enough to remain stable under sustained thermal stress.

Compatibility matters in enterprise procurement. The SK Hynix HMCG74MEBRA109N is validated for Intel Xeon Scalable processors (Sapphire Rapids generation and later) and AMD EPYC systems (Genoa generation onward). These platforms represent the current-generation compute landscape for data centres building out GPU clusters, deploying large language models, or consolidating legacy workloads onto newer hardware. The part number HMCG74MEBRA109N carries SK Hynix's component-level traceability, a detail that matters for procurement teams managing warranty chains and RMA workflows across distributed infrastructure. The module's SPD (Serial Presence Detect) hub, implemented to DDR5 specification, allows firmware to auto-detect and configure memory timing and voltage—reducing the manual BIOS configuration burden that older memory technologies required.

SK Hynix has manufactured DRAM for decades, and the engineering visible in this 32GB DDR5-6400 RDIMM reflects that pedigree: no exotic timings, no voltage premiums, just solid silicon paired with intelligent power management and error correction. Organizations purchasing memory at this tier—whether filling out a 16-socket EPYC server or a mixed-platform environment spanning multiple generations—value consistency and long-term support over headline clock speeds. This module delivers both.

Performance Specifications

• 32GB capacity per DIMM; 2Rx4 rank configuration supports 128GB+ per socket in modern servers
• DDR5-6400 (PC5-51200 equivalent) with CL46 primary timings (46-45-45); 1.1V operating voltage
• Dual-layer ECC: on-die DRAM ECC plus registered buffer protection via RCD Gen2
• On-module PMIC provides dynamic voltage and frequency management per DDR5 standard
• Operating temperature range 0°C to 85°C; 72-bit data width with 288-pin DIMM form factor
• Full JEDEC DDR5 compliance with SPD Hub; validated for Intel Xeon Sapphire Rapids and AMD EPYC Genoa platforms and later
• Part number HMCG74MEBRA109N; manufacturer-backed warranty and traceability for enterprise procurement workflows

Omnixon Global supplies SK Hynix memory modules and related enterprise infrastructure across the GCC region, Asia, and into Europe. Our procurement team maintains direct partnerships with SK Hynix and carries current-generation DDR5 inventory tailored to Xeon and EPYC deployments. For data-centre buildouts, memory upgrades, or cluster expansions, contact us to discuss your specifications, quantities, and delivery requirements. Submit an RFQ through our website or reach out directly to our technical sales team.