RAM latency, measured in nanoseconds (ns), is the delay between a command being sent to the RAM module and the data being returned. Lower latency RAM can improve system performance, especially in applications that rely heavily on memory access, such as gaming and video editing.
There are a few different ways to check the latency of your RAM. One way is to use a software tool such as CPU-Z or AIDA64. These tools will display the latency of your RAM in the SPD (Serial Presence Detect) tab.