M329R8GA0BB0-CQKZJ Samsung 64GB RDIMM PC5-38400R Memory.

M329R8GA0BB0-CQKZJ Samsung 64GB RDIMM PC5-38400R Memory Module

Overview and category definition

The M329R8GA0BB0-CQKZJ Samsung 64GB RDIMM PC5-38400R is a high-density registered DDR5 server memory module engineered for enterprise-grade systems, data centers, and mission-critical workloads. This category covers 64GB RDIMM modules featuring PC5-38400R bandwidth, 288-pin RDIMM form factor, ECC (error-correcting code) support, and registered buffering (also called “RDIMM” or “registered DIMM”). The modules are purpose-built to deliver stable, reliable, and scalable memory capacity in multi-socket servers, virtualization platforms, high-performance computing clusters, and memory-intensive applications such as in-memory databases and large-scale analytics.

Key selling points and primary search terms

When optimizing for search and conversions, focus on the exact model number and critical attributes: M329R8GA0BB0-CQKZJ, Samsung 64GB RDIMM, PC5-38400R, DDR5 SDRAM, 288-pin RDIMM, ECC Registered. These terms match technical purchase intent and should appear naturally in product descriptions, meta descriptions, category headings, and long-form content to capture buyers looking for server memory upgrades, matched kits, or OEM replacements.

Design and engineering: what sets these RDIMMs apart

Registered buffering for stability

Registered memory modules include a register between the memory controller and DRAM chips. This register reduces electrical load on the memory bus, allowing more memory modules to be populated across multi-channel server platforms. The M329R8GA0BB0-CQKZJ benefits from registered buffering to deliver improved signal integrity and reliable operation in high-density configurations—critical when building systems with multiple DIMMs per channel or multi-socket servers.

Built-in error correction for mission-critical reliability

ECC support is integral for server-grade RDIMMs. The module continually checks and corrects single-bit memory errors, reducing the chance of silent data corruption and improving uptime. For environments running sensitive workloads (financial services, healthcare databases, scientific simulations), ECC with RDIMM is often a requirement rather than an option.

High-density packaging and thermal considerations

Samsung’s engineering for 64GB RDIMM modules uses dense DRAM stacking and efficient PCB layout to maintain performance in compact module sizes. Despite higher thermal output compared to lower-capacity modules, these RDIMMs are designed with thermal resilience in mind—optimized PCB vias, controlled heat spread across the module, and compatibility with server airflow profiles. Vendors may also fit low-profile heat spreaders or require chassis-level airflow management in blade or rack servers.

Power and voltage management

DDR5 modules introduce advanced power management features including on-DIMM PMICs (Power Management Integrated Circuits) in many designs. While specifics vary by SKU, the category emphasizes consistent voltage rails for stable operation and better tolerance to thermal variation. Consult platform compatibility lists for exact voltage and PMIC behavior with your server motherboard and BIOS.

Signal integrity and timing

PC5-38400R-class modules are tuned for tight timing windows while maintaining signal fidelity across long memory traces typical of multi-socket servers. The registered architecture plus Samsung’s memory calibration ensures lower error rates and predictable latency characteristics under load.

Processor families and memory controllers

Modern x86 server processors with integrated memory controllers typically support registered ECC DDR5 modules. This includes recent generations of server CPUs from mainstream vendors that advertise DDR5 RDIMM support. Compatibility and optimal performance depend on both the CPU memory controller and motherboard BIOS, especially when populating all memory channels or mixing DRAM densities.

Performance characteristics and real-world benefits

Bandwidth and throughput PC5-38400R explained

The “PC5-38400R” designation reflects module bandwidth (in MB/s aggregate) and alignment with DDR5 nomenclature. In practical terms, these modules are optimized for higher throughput than earlier generations, translating into faster memory access for multi-threaded server workloads. Large in-memory datasets, virtualization hosts with many VMs, and high-concurrency database operations see tangible performance improvements from higher memory bandwidth and larger per-module capacities.

Use cases, customer scenarios, and deployment patterns

Enterprise virtualization and cloud hosting

Servers hosting many virtual machines benefit from fewer, larger modules to minimize DIMM slot usage. With 64GB RDIMMs, operators can increase per-socket memory capacity without increasing DIMM count, simplifying upgrades and inventory.

Database and caching appliances

Large in-memory databases require both capacity and consistent performance. These Samsung 64GB RDIMMs support workloads where large datasets must remain RAM-resident to avoid storage I/O penalties—improving query times and throughput.

High-performance computing (HPC) clusters

HPC nodes that require large contiguous memory regions or complex memory access patterns can use RDIMMs to maintain stability at scale. The registered buffer reduces signal noise in dense memory configurations typical of HPC racks.

Edge servers and telco infrastructure

Edge deployments that demand reliability in constrained physical environments also benefit from the industrial-grade design and ECC protection provided by server RDIMMs.

Comparison, alternatives, and decision-making checklist

Comparing RDIMM vs LRDIMM vs UDIMM

RDIMM: Registered buffer, recommended for general server deployments that require ECC and moderate-to-high population counts.
LRDIMM: Load-Reduced DIMM uses a buffer to reduce electrical loading and enables higher population counts and capacities per socket, often used in extreme-memory systems.
UDIMM: Unbuffered DIMM typically for desktops and some workstations; not recommended for multi-socket servers.

Inventory management and lifecycle planning

Track part numbers and serials for future warranty claims. Maintain a small pool of spare modules for rapid replacement in production-critical systems, and plan refresh cycles in line with projected capacity growth and CPU platform transitions.

Environmental and sustainability considerations

Choose vendors who offer take-back or recycling programs for end-of-life modules. Efficient memory consolidation can reduce the number of physical servers required, lowering power consumption and data center footprint.

Content snippets and microcopy for product cards

Short product blurb (for grid view)

Samsung M329R8GA0BB0-CQKZJ — 64GB DDR5 RDIMM, PC5-38400R, 288-pin, ECC Registered. Enterprise-grade memory for servers and HPC nodes. High capacity, stable operation, vendor-backed reliability.

Technical snippet (for specs tab)

Model: M329R8GA0BB0-CQKZJ | Type: RDIMM | Capacity: 64GB | Speed: PC5-38400R | Pins: 288 | ECC: Yes | Registered: Yes

Call-to-action microcopy

“Check compatibility with your server’s QVL” — link to compatibility checker. “Buy genuine Samsung RDIMM with warranty” — link to purchase or request a quote.

Final category enrichment ideas for higher conversion

Multimedia and interactive assets

Add datasheet downloads, short installation videos, and an interactive compatibility checker. Visual aids showing DIMM slot population ordering and airflow guidance help reduce support calls and improve buyer confidence.