HPE 32GB 2RX8 PC5-4800B-R Smart KIT - P50311-B21

HPE P50311-B21 32GB DDR5 ECC RDIMM Server Memory Kit

Overview

The P50311-B21 is a 32GB DDR5-4800 (PC5-38400) Registered ECC DIMM designed for HPE ProLiant and Apollo Gen11 servers. This single-module kit delivers 4,800 MT/s bandwidth — roughly 50% faster than DDR4-3200 — which matters most in memory-bandwidth-sensitive workloads like in-memory databases, video analytics engines, and virtualized security workloads running multiple VMS streams. The 288-pin RDIMM form factor and ECC data integrity checking make it appropriate for always-on server deployments where silent data corruption is not an option. CL42 latency is standard for DDR5-4800 at this density. Sourced factory-new and sealed.

Compatibility

Qualified for HPE server memory slots in the following platforms:

• HPE ProLiant Gen11 servers — includes DL, ML, and BL blade form factors in the Gen11 generation
• HPE Apollo Gen11 family — high-density compute nodes based on the Gen11 architecture
• AMD-based Gen11 platforms — confirmed compatible with HPE Gen11 systems running AMD processors

This is an HPE Smart Memory kit, meaning the server's BIOS and Intelligent Memory technology can recognize and validate the module at boot. Using non-Smart (third-party) DIMMs in HPE Gen11 systems can trigger memory warnings or restrict advanced RAS features — this kit avoids that. Verify your specific server's memory population rules (channel interleaving, DIMM slot sequence) in the HPE QuickSpecs for your model before ordering; Gen11 platforms typically require population in specific slot pairs to achieve full memory bandwidth.

Installation Notes

Install into a 288-pin DDR5 RDIMM slot only — DDR5 is not backward-compatible with DDR4 slots. Follow HPE's documented DIMM population order for your chassis to avoid operating in degraded single-channel mode. The module weighs 0.20 lb and ships in a standard DIMM anti-static package. No tools required beyond standard ESD precautions.