805358-B21 HP 64GB DDR4 Registered ECC PC4-19200 Server Memory

497765-B21 Overview

497765-B21 . Is a DDR2 Module. DDR2 Modules run from 533 to 800 MT/s (million transfers per second) This module has a total capacity of 2GB. The Bus Type is PC-6400. Uses ECC (Error Correcting Code), ideal when system failure must be avoided at all costs. Is also registered which makes it stable enough for server conditions. Has a data transfer rate of 800 Mhz. 

728629-B21 Overview

Is finding reliable DRAM memory for your HP ProLiant Server series in your data center a major challenge? When you choose HP SmartMemory you get the same high quality, reliability, and confidence that come with your HP ProLiant Gen9 Server series. DRAM quality and reliability are more important now than ever. Industry trends such as server virtualization, cloud computing, the use of large database applications, and high-performance computing have all increased the need for higher capacity memory with greater reliability and uptime. HP SmartMemory is a unique technology introduced in HP ProLiant Gen8 Servers that unlocks certain features available only with HP Qualified Server memory in Gen9 servers also. HP SmartMemory enables ProLiant Gen9 systems to reliably identify and verify whether installed memory has passed the rigorous HP qualification and testing processes. And because the memory is authenticated, you can enable extended memory performance features through the system ROM.