128GB 2666mhz Pc4-21300 Dell DDR4 SDRAM AB003148 288-pin Lrdimm RAM Module For Server

Dell AB003148 128GB DDR4 SDRAM LRDIMM Memory Module

The Dell AB003148 memory upgrade delivers exceptional server-grade performance with a 128GB DDR4 SDRAM configuration designed for enterprises that demand high-speed data processing and reliable uptime. Built with advanced ECC Registered technology, this module ensures error-free computing, enabling smooth workloads in mission-critical environments.

Main Highlights

• Massive 128GB capacity for handling complex workloads and virtualization.
• High-speed 2666MHz bus speed for faster data throughput.
• Advanced ECC (Error-Correcting Code) for data integrity and stability.
• Registered signal processing improves system reliability.
• Octa Rank x4 architecture designed for scalable enterprise performance.
• 1.2V low-voltage design reduces power consumption without sacrificing speed.

Technical Specifications

Memory Architecture

Engineered with DDR4 SDRAM technology, this module provides a perfect balance between high bandwidth and efficient power usage. The 288-pin LRDIMM form factor allows seamless installation into compatible Dell PowerEdge servers.

• Storage Capacity: 128GB (single module)
• Memory Technology: DDR4 SDRAM
• Bus Speed: 2666MHz (PC4-21300 / PC4-2666V)
• CAS Latency: CL19
• Rank: Octa Rank x4

Performance Features

Designed for data-intensive applications, the Dell AB003148 module ensures smoother multitasking, optimized virtualization, and reliable database management. Its error correction system minimizes downtime while maintaining accurate computations.

Physical Properties

Module Dimensions & Build

• Form Factor: 288-pin LRDIMM
• Height: 1.00 inch
• Depth: 6.75 inches
• Weight: 0.20 lbs

The compact design makes installation straightforward, while its durable build ensures consistent operation in demanding server environments.

System Compatibility

This Dell 128GB DDR4 module is fully tested and validated for seamless integration with high-performance Dell servers. It is optimized for systems requiring large-scale memory expansion to support cloud computing, virtualization, and data-intensive workloads.

Compatible Dell Systems

• PowerEdge R640
• PowerEdge R940

Key Benefits

Why Choose This Memory Upgrade?

• Improves application response times for enterprise workloads.
• Supports virtualization with higher memory density.
• Ensures superior data reliability through ECC technology.
• Optimized for Dell PowerEdge servers to guarantee compatibility.
• Reduces energy consumption thanks to its 1.2V power design.

Ideal Use Cases

This module is ideal for virtualized environments, data centers, cloud computing, and high-transaction databases. IT professionals seeking a dependable memory solution for maximum uptime and performance will find this Dell AB003148 module a valuable addition.

Dell AB003148 128GB PC4-21300 DDR4 LRDIMM

This category focuses on high-capacity, server-grade memory modules — specifically the Dell AB003148 128GB 2666MHz PC4-21300 CL19 ECC Registered Octa-Rank x4 1.2V DDR4 SDRAM 288-pin LRDIMM. It covers product families, technical subvariants, compatibility matrices, deployment best practices, performance expectations, and procurement considerations for datacenter and enterprise-class servers. Pages in this category are optimized for search intent related to enterprise RAM upgrades, server memory scalability, and validated Dell memory modules compatible with modern Intel and AMD server platforms.

Product Family and Subcategory Structure

The category groups items by several dimensions: capacity (64GB, 96GB, 128GB, 256GB LRDIMMs), speed grade (2133MT/s, 2400MT/s, 2666MT/s), register type (LRDIMM vs RDIMM), rank architecture (single, dual, quad, octa), and ECC modalities (ECC Registered, ECC Buffered). The Dell AB003148 module sits in the high-density, high-stability segment — often cataloged under “Dell 128GB DDR4 LRDIMM 2666MHz” or “Dell server memory PC4-21300 128GB ECC Registered”. Subcategories include:

• High-capacity LRDIMM modules (64GB–256GB)
• 2666MHz server memory modules (PC4-21300)
• ECC Registered and ECC Buffered memory for fault-tolerant systems
• Octa-rank memory modules for maximum DRAM density
• Dell-branded validated memory and Dell-certified replacements

Key Technical Specification Breakdown

Module Identity

Part Number: Dell AB003148 — this is the vendor SKU used in Dell parts catalogs and many reseller listings. The SKU identifies a factory-tested, server-validated memory module designed to meet Dell system firmware validation and platform compatibility.

Memory Density & Organization

Capacity: 128GB per module. This makes the AB003148 ideal for memory-dense deployments that require large in-memory datasets, virtualization density, or in-memory analytics.

Rank: Octa-rank (8R). Octa-rank modules allow higher DRAM chip densities to be presented to the memory controller while staying within signaling constraints supported by LRDIMM buffering.

Data Width & Component Configuration

x4 DRAM organization: The module uses DRAM dies organized with a x4 data width, which affects how memory chips are arranged on the module and can influence performance characteristics in certain server memory topologies.

Speed & Timings

Speed: 2666MT/s (often marketed as 2666MHz or PC4-21300). This speed class balances latency and throughput for mainstream modern server CPUs widely used in enterprise systems.

CAS Latency: CL19 — typical latency spec for high-capacity 2666MT/s LRDIMMs. While CL values measure column access strobe delays, in practice overall throughput and server-level memory performance depend on DIMM rank, buffering, and memory channel distribution.

Voltage & Electrical

Voltage: 1.2V DDR4 standard. This ensures compatibility with modern power management and lower energy consumption compared with older, higher-voltage modules.

Form Factor & Pinout

Form Factor: 288-pin DIMM, standard for DDR4 server memory. The module is keyed and keyed for registered LRDIMM sockets typical in rackmount and tower servers.

Error Correction & Registration

ECC Registered: The module supports Error-Correcting Code and is registered (buffered) which offloads drive signals from the memory controller, enabling higher density and stable operation across multiple DIMMs per channel. ECC Registered modules correct single-bit errors and detect multi-bit errors, making them the de-facto choice for enterprise servers where data integrity is critical.

Performance Characteristics and Real-World Throughput

Bandwidth & Latency Considerations

At 2666MT/s, theoretical per-module bandwidth is substantial; however, real-world throughput on servers depends on the memory channel configuration (single, dual, quad-channel CPUs), the number of DIMMs per channel, and whether LRDIMM buffering is used. Octa-rank modules can increase loading and may affect achievable top-tier frequency on certain platforms — manufacturers will often recommend specific population rules to sustain 2666MT/s across all channels.

NUMA and Multi-Socket Scaling

In multi-socket systems, memory distribution across CPU sockets and NUMA domains impacts application performance. Using high-capacity LRDIMMs like AB003148 enables large per-socket memory allocations but administrators must plan NUMA-aware topology and page placement for latency-sensitive workloads.

Typical Use Cases That Benefit from 128GB LRDIMMs

• High-density virtualization hosts (VMware ESXi, Hyper-V)
• Large in-memory databases (SAP HANA, Redis, Memcached)
• Analytics platforms and real-time data processing
• Scientific computing nodes performing large simulations
• High-availability enterprise applications with memory replication

Compatibility Matrix & Server Platforms

Modules in this category are typically validated against specific Dell PowerEdge generations and chipset families. Dell part number AB003148 is most commonly listed for PowerEdge server lines supporting DDR4 LRDIMM modules at 2666MT/s. Always cross-reference the server model’s memory QVL (Qualified Vendors List) or Dell’s support documentation for exact compatibility — key compatibility considerations include BIOS/firmware revisions, CPU microcode, and maximum supported memory per socket.

CPU and Memory Controller Constraints

Memory controller limitations (on-CPU controllers for modern x86 architectures) determine the maximum supported rank and speed combination. Some CPUs will downclock memory if non-optimal rank/population rules are used. Server vendors publish specific guidance on DIMM population order to preserve 2666MT/s operation when populating multiple DIMMs per channel.

Heat and Cooling Considerations

High-capacity LRDIMMs can run warmer than low-density DIMMs. Ensure adequate airflow in the chassis, monitor temperature sensors, and place modules in slots that avoid obstructing airflow. Use chassis baffles and maintain regular server cleaning intervals in dusty environments.

Reliability, ECC, and Data Integrity

The AB003148 supports ECC Registered functionality, designed to detect and correct single-bit memory errors and detect double-bit errors. In enterprise environments this reduces silent data corruption risk. When used with platforms that support memory scrubbing, ECC Registered DIMMs help maintain memory integrity over long uptimes.

SMART Monitoring & System Event Logging

Servers expose DIMM health via system management tools (iDRAC for Dell systems, IPMI, or vendor monitoring agents). This category includes guidance on interpreting predictive failure indicators reported by these systems and on integrating memory event alerts into centralized monitoring solutions (e.g., Nagios, Zabbix, Splunk).

Testing, Validation, and Burn-in Procedures

High-density modules should be tested in situ before being rolled into production:

• Run memtest86 or vendor-recommended memory diagnostics across all populated DIMMs.
• Perform server stress tests under production-like loads for extended periods to identify thermal or stability issues.
• Validate interop with NICs, storage controllers, and GPU accelerators if the host pairs memory-heavy workloads with other high-throughput devices.

Comparisons & Alternatives

128GB LRDIMM vs 64GB RDIMM

Choosing 128GB LRDIMM delivers higher per-socket capacity with fewer DIMM slots populated compared to using multiple 64GB RDIMMs. LRDIMMs enable denser memory configurations but may be more expensive per module and require firmware support for optimal performance. For workloads where capacity per socket is the priority, LRDIMM is the better choice. For slightly higher raw memory bandwidth and lower per-module latency, RDIMM can be preferable when capacity needs are lower.

DDR4 2666MT/s vs DDR4 2933/3200/2400

While higher-frequency memory (2933MT/s, 3200MT/s) can provide increased theoretical bandwidth, servers often operate at prescribed speeds validated by the vendor and CPU memory controller. For many enterprise workloads, the 2666MT/s class offers a robust combination of compatibility, stability, and proven performance across diverse platforms.

Security Considerations

Physical security of server memory is often overlooked. For environments requiring secure decommissioning, ensure modules are handled according to data-destruction policies. Some organizations opt to physically destroy modules at end-of-life or use certified data sanitization processes for memory that may contain sensitive ephemeral data.

Lifecycle Management and Refresh Strategies

Plan memory refresh cycles alongside CPU and storage refresh timelines. Memory refresh is typically driven by capacity needs more than performance needs. Retaining spare modules and stock-keeping parts such as AB003148 in a parts inventory reduces Mean Time To Repair (MTTR) for memory-related failures.

Monitoring, Alerts, and Preventive Maintenance

Integrate memory health metrics into the broader datacenter monitoring ecosystem. Set alerts for ECC correction rates, DIMM voltage anomalies, and thermal excursions. Implement preventive maintenance procedures: periodic re-seating during maintenance windows, dust removal, and firmware updates to minimize failed memory training events at boot time.

Use-Case Scenarios and Deployment Examples

Below are practical examples showing how AB003148 modules are deployed in modern infrastructures:

• Virtualization Consolidation: Deploy four 128GB modules per socket to enable 512GB–1TB per node in dual-socket servers, increasing VM density and reducing per-VM footprint.
• In-Memory Databases: Single-socket or dual-socket servers with multiple 128GB LRDIMMs host large HANA or in-memory caches where database pages remain resident in RAM for low-latency access.
• HPC Compute Nodes: Memory-bound simulations leverage large per-node memory to reduce cross-node communication and improve simulation throughput.

Content Maintenance & Update Cadence

Keep the category page updated with new compatibility notes, BIOS updates that affect memory support, and any Dell service bulletins related to memory training. Refresh FAQs periodically to reflect common support cases and to capture long-tail search queries generated by customers and technicians.

Conversion & Technical Pre-Sales Guidance

For conversion-focused copy, highlight compatibility guarantees, warranty terms, and cross-platform support. Provide clear call-to-action elements: “Check compatibility with your PowerEdge model”, “Request volume pricing for AB003148”, and “Download technical datasheet”. Include helpful technical downloads: memory population guides, quick-install cards, and PDF spec sheets.