Where can I find CAS explained?

[spoon805]

I'm trying to decide between some Corsair RAM that are almost identical except for their latency.

One stick is "2-2-2-5-T1", the other is "2-3-3-6-T1". Obviously the first is Corsair's XMS Low Latency (LL) model. Though I guess the first number is the stick''s CL, I'm having a hard to finding a explanation of what the other numbers mean.

Please help me out. Thanks.

 

[Adul]

try the at faq

 

[spoon805]

thanks...forgot about those

 

[spoon805]

Well, checked it out, and there was no explaination.

 

[Wolfsraider]

CAS Latency, What Is It?

hth

mike

 

[Davegod]

a more simple one from curcial memory terms

CL=3, CL=2, and CL=2, 2-clock
In our Memory Selector, the CAS latency of our parts is designated with "CL=3," "CL=2," or "CL=2, 2-clock." (You may see this written elsewhere as "CL2, etc." or "CAS=2, CAS=3, etc.") CAS latency is the amount of time it takes for your memory to respond to a command. It only affects the initial burst of data. Once data starts flowing, latency has no effect.

Latency is measured in terms of clock cycles. For example, a CL=2 part requires two clock cycles to respond, while a CL=3 part requires three clock cycles. Thus, CL=2 parts complete the initial data access a little more quickly than CL=3 parts. However, a clock cycle for a systems with a 100MHz front side bus is only 10 nanoseconds (10 billionths of a second), so you probably won't be able to tell the difference between a CL=2 and a CL=3 part.

Most systems will accept either part; however, some systems require one or the other. These requirements are built into our Memory Selector