HP 16GB DDR4-2133 ECC Unbuffered DIMM — 805671-B21

The HP 805671-B21 is a 16GB DDR4-2133 (PC4-17000) ECC Unbuffered memory module built for HP ProLiant Gen9 servers. Running at 1.2V with CL15 timing and a dual-rank 2Rx8 configuration, it provides ECC-protected bandwidth for workloads that prioritize uptime and data integrity.

Key Features

• 16GB DDR4 ECC Unbuffered — validated for HP ProLiant Gen9 server platforms
• 2133MHz throughput for demanding virtualization and enterprise workloads
• Dual-rank 2Rx8 layout enabling balanced capacity and bandwidth
• Energy-efficient 1.2V operation for lower server power draw

Product Specifications

• Part Number: 805671-B21
• Manufacturer: HP
• Capacity: 16GB
• Type: DDR4 ECC Unbuffered (UDIMM)
• Speed: 2133MHz (PC4-17000)
• CAS Latency: CL15
• Voltage: 1.2V
• Ranks x Width: 2Rx8
• Pins: 288-pin

Memory Specifications

• Memory Standard: JEDEC DDR4-2133
• Error Correction: ECC (Error Correcting Code)
• Buffer Type: Unbuffered (UDIMM)
• DRAM Generation: DDR4

Performance Specifications

• Peak Bandwidth: ~34.1 GB/s (PC4-17000)
• ECC Type: Single-bit error correction, multi-bit error detection
• RAS Features: ECC scrubbing, memory mirroring support (platform dependent)

Use Cases

• HP ProLiant Gen9 server memory upgrades and capacity expansion
• High-availability virtualization environments requiring ECC RAM
• Enterprise database servers and mission-critical applications
• Energy-efficient data center deployments at 1.2V

Compatibility

• HP ProLiant DL380 Gen9, DL360 Gen9, DL560 Gen9
• HP ProLiant ML350 Gen9, BL460c Gen9, DL180 Gen9
• Platforms supporting DDR4-2133 ECC Unbuffered 288-pin memory

Frequently Asked Questions

Is 805671-B21 the same as 819801-001?

Yes — 805671-B21 is the HP option kit part number and 819801-001 is the spare part number. Both are 16GB DDR4-2133 ECC UDIMM modules with identical specifications and are interchangeable.

Is 805671-B21 compatible with HP ProLiant Gen10 servers?

This module is validated for Gen9 platforms. Gen10 servers require DDR4-2666 or higher; confirm your server's QVL before installing in a Gen10 system.

What does ECC Unbuffered mean?

ECC Unbuffered (UDIMM) means the module includes error-correcting code for data integrity but does not use a register/buffer chip — suitable for servers and workstations that support ECC UDIMM slots.

The HP 805671-B21 16GB DDR4-2133 ECC UDIMM is a proven server memory solution for HP ProLiant Gen9 infrastructure. Order today for fast shipping at a competitive price.