P01366-B21 - HPE 96W Smart Storage Battery (up to 20 Devices) with 145mm Cable Kit

HPE P01366-B21 — 16GB (1×16GB) DDR4-2666 Registered ECC Smart Memory Kit

What it is

P01366-B21 is an HPE Smart Memory RDIMM for ProLiant servers and select HPE platforms that use DDR4 memory. It’s a 16GB DDR4 Registered ECC module running at 2666 MT/s, qualified by HPE for stable, supported performance in Gen10/Gen10+ and some Gen11 configurations that accept DDR4.

Why buyers pick P01366-B21 (plain English)

• Certified compatibility
  HPE Smart Memory avoids “won’t boot” issues and ensures proper performance/health reporting in supported ProLiant systems.

• Server-grade reliability
  Registered ECC memory detects and corrects errors — essential for uptime and data integrity in enterprise workloads.

• Affordable, practical capacity
  16GB per stick is a useful building block for general-purpose workloads, VMs, database hosts, and app servers.

• Fills memory channels correctly
  RDIMMs help maximize CPU performance by populating slots in balanced configurations.

60-second spec box (P01366-B21)

Capacity

• 16 GB

Module type

• DDR4 RDIMM (Registered DIMM)

Speed / standard

• DDR4-2666 (PC4-21300 class)

Rank / organization

• Typically Single Rank or Dual Rank (platform dependent)

ECC / reliability

• ECC Registered — error correction and server-grade robustness

Voltage

• 1.2 V

Pins / form factor

• 288-pin DIMM

Target platforms

• HPE ProLiant Gen10 / Gen10 Plus servers

• Some Gen11 SKUs that accept DDR4 (platform dependent)

• Systems that specify DDR4-2666 RDIMM Smart Memory

Where it fits (and when to choose something else)

Perfect for:

• Adding RAM to supported ProLiant servers

• Virtualization, app servers, DB hosts on DDR4 platforms

• Balanced memory channel population for best performance

Choose something else if:

• Your server uses DDR5 (Gen11) → use DDR5 Smart Memory instead

• You need higher capacity per slot → 32GB/64GB/128GB RDIMMs

• Your platform expects LRDIMM rather than RDIMM

TL;DR

P01366-B21 is HPE’s 16GB DDR4-2666 ECC Registered Smart Memory RDIMM:
a platform-qualified, dependable 16GB stick for expanding memory in supported HPE ProLiant systems.