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columm access strobe (CAS)

The Columm Access Strobe (CAS), also known as CAS latency, describes how long it takes to read a column of a memory cell

. The Columm Access Strobe is the amount of time it takes

fora memory device to read the first data word after receiving the command and address

. The latency is a rating for the readout time and depends on the data rate of the motherboard's front side bus. The lower the value, the better. For example, a DIMM module with a CAS latency of 2 (CL2) is better than one with 3 (CL3). The same applies to the Row Access Strobe (RAS), the so-called RAS latency.

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Englisch: columm access strobe - CAS
Updated at: 23.06.2011
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