HPE 16GB 2666MHz DDR4 PC4-21300 ECC Registered CL19 288-Pin Non-Volatile DIMM 1.2V Single Rank x4 Memory Module - 874540-001

The HPE 874540-001 is a 16GB DDR4-2666 (PC4-21300) ECC Non-Volatile DIMM (NVDIMM) in single-rank 1Rx4 configuration and is the spare part designation for HPE ProLiant Gen10 servers. NVDIMMs combine DRAM performance with flash-backed persistence, enabling memory-speed storage or ultra-low-latency persistent data retention across power cycles in HPE ProLiant Gen10 environments.

Key Features

• 16GB DDR4-2666 NVDIMM spare — DRAM-speed persistent memory for ProLiant Gen10
• Non-volatile flash-backed persistence retains data across power cycles and system resets
• 1Rx4 single-rank ECC DIMM at DDR4-2666 speeds for memory-speed persistent storage
• Enables ultra-low-latency persistent data tier for databases and transaction logs

Product Specifications

• Part Number: 874540-001
• Manufacturer: HPE
• Capacity: 16GB
• Type: DDR4 ECC Non-Volatile DIMM (NVDIMM)
• Speed: 2666MHz (PC4-21300)
• CAS Latency: CL19
• Voltage: 1.2V
• Ranks x Width: 1Rx4
• Pins: 288-pin

Memory Specifications

• Memory Standard: JEDEC DDR4-2666
• Error Correction: ECC (single-bit correction, multi-bit detection)
• Buffer Type: Registered Non-Volatile DIMM (NVDIMM)
• Persistence: Flash-backed — retains data on power loss

Performance Specifications

• Peak Bandwidth: ~42.7 GB/s (PC4-21300) — DRAM-speed access with persistence
• ECC Type: Single-bit error correction, multi-bit error detection
• Persistence Latency: Flash backup transparent to OS — DRAM latency during normal operation

Use Cases

• HPE ProLiant Gen10 persistent memory for ultra-low-latency transaction log storage
• Database write-ahead logs and checkpoint acceleration using NVDIMM persistence
• In-memory computing with data persistence across power cycles on Gen10 platforms
• Gen10 field replacement for 16GB DDR4-2666 NVDIMM installations

Compatibility

• HPE ProLiant DL380 Gen10, DL360 Gen10 with NVDIMM-capable memory slots
• Intel Xeon Scalable 1st/2nd Generation (Skylake-SP / Cascade Lake-SP) with NVDIMM support
• Requires HPE-validated NVDIMM backup power module (BBU) for data protection

Frequently Asked Questions

What is an NVDIMM and how does it differ from standard RDIMM?

An NVDIMM (Non-Volatile DIMM) is a DRAM module with integrated flash storage and a battery backup unit. During normal operation it functions at DRAM speed. On power loss, the BBU powers the module long enough to flush DRAM contents to flash, preserving data across power cycles — unlike standard RDIMMs which lose data on power loss.

Does 874540-001 require a special backup power module?

Yes — HPE NVDIMMs require an HPE NVDIMM Backup Power Module (BBU) to enable the flash backup on power loss. Without the BBU, the NVDIMM may operate in DRAM-only mode without persistence. Consult HPE ProLiant Gen10 QuickSpecs for the required BBU part number.

Is 874540-001 interchangeable with 845264-B21 and 825109-091?

Yes — 874540-001 is the spare part, 845264-B21 is the option kit, and 825109-091 is a factory/OEM variant. All are HPE 16GB DDR4-2666 ECC NVDIMM 1Rx4 modules — functionally interchangeable in supported Gen10 configurations with appropriate BBU.

The HPE 874540-001 16GB DDR4-2666 NVDIMM spare delivers DRAM-speed persistent memory for HPE ProLiant Gen10 mission-critical deployments. Order today — in stock at the lowest price.