What is CL or CAS Latency?
CL stands for CAS Latency. It is a programmable register in the SDRAM that sets the number of clock cycles between the issuance of the READ command and when the data comes out. Smaller number for CL indicates faster SDRAM within the same frequency. Several Memory module suppliers are offering PC133 modules with a performance setting of 3-2-2 . What advantage does a 2-2-2 module provide? The first number of the 2-2-2 designation refers to CAS latency, so in short you are asking the advantage of a CAS latency of 2 over one of 3. Adjusting a device to CL = 2 from CL = 3 will speed up a cc ess time from a READ command to the point at which data is available on the data bus (1 clock quicker). Base on benchmark testing results, better performance improvements were found in the 2-2-2 setting over the 3-2-2 : Are PC133 speed-tested SDRAMs backward compatible with PC100? Yes. The AC timing specifications on a PC133 device are tested to allow a system bus to run at 133 MHz. The PC100 and PC66 ti
