5punk

Can someone please explain to me what CAS Timings are all about please.

Thanks

Basically the lower the CAS number the better the memory works. On some motherboards it sets it automatically, but for others you have to set the timings and voltages yourself in the BIOS.

I'm pretty sure my ram timings are set a bit higher than they should be, and the voltage a bit lower than it should be also. I never got round to setting it right.

Shada wrote:Basically the lower the CAS number the better the memory works. On some motherboards it sets it automatically, but for others you have to set the timings and voltages yourself in the BIOS.

Kinda ish.

there's a lot more to it than that. and all motherboards should do it automatically, only time they won't is if the memory is very weird, or broken.

Voltages on the other hand, you often have to set manually.

http://www.hardwaresecrets.com/article/26/1 is handy.

How geek do you want?

Inside the chips on the ram pcb's are a metric shit ton of teeny weeny capacitors. Each one of them is assigned a location in regard to row, column and on which memory module they exist.

RAS stands for row address select, it does what it says, finds the row the controller wants the info from.

CAS stands for column address select, again it does what it says, finds the column on the module where the info is stored.

CL or CAS Latency as a number signifies the amount of time in clock cycles that it takes for the request from the memory controller for certain information stored at a certain place and for that data to be retrieved and read from the module output pins.

Thing is a CAS is time from request to the first bit arriving at the output pin. Low CAS is good, but for long pieces of information, a higher clock speed is more important, because the information may take a few nanoseconds longer to start arriving, but it'll all arrive faster.

More info can be found via http://www.google.com

/geek.

Wikipedia wrote:CAS is an abbreviation for column address strobe, or sometimes column address select, both referring to the column of the physical memory location in an array (comprised of columns and rows) of capacitors used in dynamic random access memory modules.

Thus CAS latency (CL) is the time (in number of clock cycles) that elapses between the memory controller telling the memory module to access a particular column in the current row, and the data from that column being read from the module's output pins.

Lower is better.

Fear wrote:Lower is better.

Yes, those three words are pretty much all the average person needs to know, really.