An administrator is adding memory to a server. Once the system boots up, the same amount of memory appears as before the upgrade. Which of the following is the MOST likely cause?

Incorrect CAS latency might cause performance issues or system instability, but the memory would typically still be detected and its total amount reported.

Many server motherboards have specific DIMM population rules, requiring memory modules to be installed in particular slots or in a specific order for proper detection and utilization. If new memory is not seated correctly or is in an unsupported slot, the system will not recognize it.

Incorrect memory timing usually leads to system instability or boot failures, but the physical presence of the memory modules is generally still detected by the system.

Incorrect memory speed might result in the modules running at a slower compatible speed or cause compatibility errors, but the system would usually still detect the total physical amount of memory installed.