P50311-B21 - HPE 32GB 2Rx8 DDR5-4800 Server Memory

HPE P50311-B21 — 32GB (1×32GB) DDR5-4800 Registered ECC Memory (2Rx8)

What it is

P50311-B21 is an HPE server-grade DDR5 Registered ECC memory module designed for use in HPE ProLiant Gen11 and other supported DDR5 platforms. It’s a 32 GB RDIMM running at DDR5-4800 speed with a 2Rx8 rank configuration, qualified by HPE for reliability and compatibility.

Why buyers pick P50311-B21 (plain English)

Server-grade reliability: ECC (error-correcting code) helps detect and correct memory errors, which improves uptime and data integrity in enterprise workloads.

DDR5 performance: Faster base speeds and improved efficiency over DDR4 make it a great choice for modern server workloads.

Registered buffering: RDIMMs buffer memory signals for better stability and higher supported capacities compared to unbuffered modules.

HPE Smart Memory: Ensures proper timing, voltage, and reporting behavior with ProLiant servers, reducing compatibility headaches.

60-second spec box (P50311-B21)

Capacity

• 32 GB

Module count

• 1 × 32 GB RDIMM

Memory type

• DDR5 Registered ECC (RDIMM)

Speed

• 4800 MT/s

CAS / latency class

• DDR5 typical latency and timings at 4800 class

Rank / organization

• 2Rx8 (dual rank)

Voltage

• Standard DDR5 server DIMM voltage

Form factor

• 288-pin RDIMM

Where it fits (and when to choose something else)

Perfect for:

• Adding memory to supported HPE ProLiant Gen11 servers

• Virtualization hosts and general enterprise compute

• Balanced channel population for performance

Choose something else if:

• You need higher capacity per DIMM → 64 GB, 128 GB RDIMMs

• You’re on a DDR4 platform → use DDR4 memory instead

• You want LRDIMM for very high total capacity in certain servers

TL;DR

P50311-B21 is an HPE 32 GB DDR5-4800 Registered ECC memory module (2Rx8): a reliable, server-qualified DIMM for modern ProLiant Gen11 systems.