An ad for memory might sometimes give the CAS Latency value within a series of timing numbers, such as 5-5-5-15. The first value is the CAS latency, which would mean that in this case, this module is CL5. The second value is RAS latency.
CL5
i believe it refers to "cas latency"
In general, if you want better performance, lower cas latency is better.
CAS and RAS Latency are two ways of measuring speed
CAS (column access strobe) Latency and RAS (row access strobe) Latency
Typically, RAM specifications include its type (such as DDR4 or DDR5), capacity (measured in gigabytes), speed (measured in megahertz), latency (measured in CAS latency), and form factor (such as DIMM for desktops or SO-DIMM for laptops). Additionally, thermal performance, power consumption (voltage), and compatibility with motherboards are often noted. Some manufacturers also provide details about heat spreaders or RGB lighting features.
CAS latency (Column Address Strobe latency) refers to the delay time between the memory controller requesting data from RAM and the moment that data is available for use. It is measured in clock cycles and is a crucial factor in determining memory speed and performance. Lower CAS latency values indicate faster response times, enhancing overall system efficiency, particularly in memory-intensive applications.
CAS Latency rating.
CL: (CAS Latency) or Column Address Strobe Latency is a measurement of delay of the chip's process. So the lower the CL number the lower the latency will be. So your answer is cl5.
CAS Latency
Latency. The main latency figure is CAS Latency, also called CL Latency is the number of clock cycles that a RAM chip has to wait after being read or written, before it is ready to be read or written again. A lower latency means less time the computer has to wait before it can do another memory operation.
For DDR(CAS / DATA RATE) * 2000 = X ns(7/1333MHz) *2000 = 10.5 ns