What is the best way to ensure optimal server performance when adding RAM modules?

Using the same type and brand of RAM across all banks is the best way to ensure optimal server performance. When RAM modules are matched in type, speed, and capacity, they are more likely to function efficiently together, leading to enhanced overall system performance. This is particularly important because RAM may operate under the lowest common denominator principle; if the RAM modules are mismatched, the system will run at the performance level of the slowest module, which can lead to bottlenecks.

Having uniformity in RAM also helps with compatibility and stability. Mixed RAM can lead to issues such as crashes, instability, or failure to boot, as not all modules may support the same operating parameters. Therefore, for reliable performance, it's essential to use RAM modules that are identical in specifications.

This approach ensures that the memory controller can efficiently access information without complications that arise from mismatches. It also simplifies the process of troubleshooting performance issues related to memory, as any problems can be more easily isolated when a uniform configuration is utilized.