What is the CAS number in the memory rating?
CAS (Column Access Strobe) latency: CAL Latency usually has the most impact on memory performance. A common marketing term attached to SDRAM modules is either “CAS2” or “CAS3”. Unfortunately, this is a bit misleading, as they should be referred to as CL2 or CL3, since they refer to CAS Latency timings (2 clocks vs. 3 clocks). A CAS latency of 2 clocks is currently very good. Each is described with a rating number, where lower numbers are better. The rating is also dependant on the front side bus speed of your motherboard so the rating may rise on higher speeds.
