874540-001 HPE RAM 16GB 2666MHZ PC4-21300 CL19 ECC 288-Pin DDR4 SDRAM

HPE 874540-001 16GB Memory Overview

The HPE 874540-001 16GB PC4-21300 DDR4-2666MHz Registered ECC CL19 288-Pin NVDIMM 1.2V Single Rank Memory Module represents a focused intersection of enterprise-grade memory engineering and modern server reliability requirements. Designed explicitly for HPE server platforms and systems that support NVDIMM functionality, this 16GB module combines the throughput advantages of DDR4-2666 memory with the data protection and stability afforded by Registered ECC (Error Correcting Code) and the non-volatile characteristics inherent to NVDIMM technology. With a 288-pin DIMM form factor and a JEDEC-compliant electrical interface operating at a nominal 1.2V, the HPE 874540-001 balances power efficiency, performance, and fault-tolerant behavior for mission-critical workloads.

Technical Specification

Each descriptor in the product name — HPE 874540-001 16GB PC4-21300 DDR4-2666MHz Registered ECC CL19 288-Pin NVDIMM 1.2V Single Rank Memory Module — carries significance. The 16GB capacity denotes a single-module storage density suitable for scaling server memory in increments. PC4-21300 indicates theoretical peak bandwidth for DDR4 memory rated to the PC4-21300 classification, corresponding to a 2666MT/s data rate. DDR4-2666MHz is the effective transfer rate, delivering robust sustained throughput for multi-threaded and I/O-intensive processes. Registered ECC architecture provides on-module registers that buffer and stabilize command/address lines to the memory bus while enabling single-bit error correction and multi-bit error detection, a critical feature for systems running error-sensitive applications. CL19 (CAS Latency 19) describes the column access strobe latency under standard timing parameters and is a trade-off point between raw clock speed and timing stability. The 288-pin designation conforms to standard DDR4 DIMM mechanical compatibility with enterprise motherboards and servers. NVDIMM functionality integrates non-volatile retention capabilities, allowing the module to persist memory contents across power events when configured with supported server platforms and power/backup subsystems. Finally, the 1.2V operating voltage reflects the DDR4 standard’s energy profile, and Single Rank reveals the chip organization which can influence memory channel population strategies and compatibility with certain memory controllers.

Architectural

Registered ECC memory, such as this HPE 874540-001 module, is engineered for server-class reliability. The register on Registered DIMMs (RDIMMs) buffers the command and address signals, reducing electrical load on memory controllers when multiple DIMMs are installed per channel. This buffering improves signal integrity and allows higher memory densities across channels without sacrificing stability. ECC mechanisms identify and automatically correct single-bit errors, which are increasingly important as DRAM densities rise and the likelihood of correctable errors increases. For systems running virtualization layers, large databases, in-memory analytics, or long-running scientific computations where silent data corruption is unacceptable, Registered ECC provides crucial protection. The HPE 874540-001’s design supports these use cases by minimizing error propagation and enabling operational continuity in data center environments where uptime and data integrity are top priorities.

NVDIMM

NVDIMM technology extends classic volatile DRAM by providing a mechanism for preserving memory contents through power loss events. In the context of the HPE 874540-001 NVDIMM, persistent memory capabilities are achieved via integration with the server’s power, backup capacitors, or storage controller support, enabling a rapid and consistent transition of volatile data to a non-volatile medium when a shutdown or outage is detected. This retention enables near-instant recovery of active in-memory datasets upon system restart, dramatically reducing downtime for workloads that depend on large resident datasets. For workloads such as in-memory databases, persistent caches, or transaction journaling, NVDIMM-equipped systems can avoid costly and time-consuming data rehydration from secondary storage. The module’s non-volatile behavior works in concert with platform firmware and operating system drivers that recognize and leverage NVDIMM namespaces, ensuring coherent and crash-consistent state transitions tailored to enterprise software stacks.

Performance

DDR4-2666 provides a comfortable bandwidth envelope for a wide range of server workloads, from virtualization to web services to compute-intensive applications. The effective data rate of 2666MT/s combined with the PC4-21300 bandwidth rating ensures efficient data movement between processor and memory subsystems. CAS Latency (CL19) indicates the number of clock cycles between a read command and the moment data becomes available, and while CL19 is not the lowest latency available, it represents an optimized balance between speed and signal reliability in the Registered ECC, high-density enterprise DIMM space.

Compatibility

Compatibility is a central consideration when deploying the HPE 874540-001 16GB PC4-21300 DDR4-2666MHz Registered ECC CL19 288-Pin NVDIMM 1.2V Single Rank Memory Module. The module is built to align with HPE server specifications and validated configurations, ensuring that it works reliably with HPE ProLiant and selected HPE Synergy platforms that support both Registered ECC and NVDIMM features. Because Registered ECC and NVDIMM support can require specific BIOS/firmware versions, platform drivers, and optional power or backup modules, administrators should reference HPE’s system documentation and compatibility matrices to confirm full support for non-volatile memory features. In mixed-vendor environments, the 288-pin mechanical standard enhances physical interchangeability, but electrical and firmware compatibility remains the gating factor; running unsupported NVDIMM configurations in systems that have not been validated by HPE can lead to suboptimal behavior or unsupported failure modes.

Use Cases

The HPE 874540-001 16GB PC4-21300 DDR4-2666MHz Registered ECC CL19 288-Pin NVDIMM 1.2V Single Rank Memory Module is well-suited to enterprise workloads that require high availability, fast recovery, and consistent memory integrity. In-memory databases that keep active datasets resident in DRAM benefit from NVDIMM persistence because transaction logs and critical state can survive sudden power loss without a lengthy rebuild from secondary storage. Virtualized environments that host dozens or hundreds of VMs per server profit from the module’s ECC protection which reduces the chance of bit flips causing VM corruption. High-performance computing tasks that rely on large shared memory footprints can also leverage the module’s bandwidth characteristics and register buffering to maintain stable throughput under heavy parallel memory accesses. In caching layers, persistent memory reduces cold-start penalties and accelerates cache warm-up times, while analytics workloads see advantages in reduced I/O wait when large working sets remain in memory and survive transient outages.

Comparative

Compared to traditional RDIMM without non-volatile features, an NVDIMM like the HPE 874540-001 introduces persistence and faster recovery at the cost of additional platform integration requirements. Traditional RDIMMs provide robust performance and ECC protection but lose all volatile contents on power loss, requiring backup or checkpointing strategies at the software level. Consumer DDR4 modules lack Registered buffering and ECC, making them inappropriate for enterprise reliability requirements. The HPE 874540-001 addresses enterprise needs by combining Registered ECC, JEDEC-compliant DDR4-2666 performance, and NVDIMM persistence to create a hybrid memory tier that can simplify application architectures by allowing certain data structures to be persisted in memory without a separate storage layer. This convergence reduces application complexity while raising the bar for platform validation and firmware support to ensure safe data persistence semantics.

Multitasking

The 16GB capacity of this RAM module enables smooth multitasking. You can have multiple applications open simultaneously without experiencing lag or delays. This is especially useful for professionals who need to run resource-intensive software such as video editing tools, CAD software, or data analysis programs. With 16GB of RAM, you can easily switch between tasks without any noticeable performance degradation. This allows for a seamless workflow and increased productivity.

Efficient Data Processing

The 16GB capacity also ensures efficient data processing. It provides enough space for temporary storage of data while it is being processed by the CPU. This helps in reducing latency and improves overall system responsiveness. Whether you're working with large datasets, rendering complex graphics, or compiling code, the 16GB capacity allows for faster data processing, resulting in quicker task completion times.