The HPE P43331-B21 is a 64 GB DDR5 SmartMemory module from Hewlett Packard Enterprise for HPE ProLiant Gen11 servers, Apollo systems, and other compatible HPE server platforms. It offers a memory capacity of 64 GB per module, a transfer rate of 4,800 MT/s (DDR5-4800, PC5-38400), and an operating voltage of 1.1 V for energy-efficient operation.

The memory module uses a dual-rank x4 architecture (2Rx4) with ECC (Error-Correcting Code) error correction and is designed as a Registered DIMM (RDIMM) with 288 pins. The CAS latency is CL40 (40-39-39), which enables a high data transfer rate while maintaining low latency.

HPE SmartMemory undergoes rigorous qualification and testing processes to enable advanced error detection and optimization features that are available exclusively with HPE hardware. The module is designed for use in data centers, virtualization environments, cloud computing, and large-scale database applications.