What memory would you use on a mission critical server?

For a mission-critical server, I would use ECC (Error-Correcting Code) RAM, as it detects and corrects internal data corruption, ensuring higher reliability and stability. Additionally, I would opt for high-speed DDR4 or DDR5 memory with sufficient capacity to handle the server's workload efficiently. Redundant configurations, like using multiple memory channels and ensuring compatibility with the server's architecture, are also essential for optimal performance and uptime.