CAS2or3?

[Guest]

Hey, can anyone tell me what CAS stands for? I just got this PC133 SDRAM chip, and I checked the bios and it was set to CAS3....what if i changed it to CAS 2? would it be possible? It's also set to 10ns...but there are options for 8ns, normal fast and turbo...what happens if i changed it to CAS@ and Turbo?

 

[mpjesse]

CAS: Column Access Strobe Latency

CAS is basically the number of cycles it takes your CPU to send one bit to the memory. CAS 2 is obviously faster requiring less cycles to tranfer data between the CPU and the memory- increasing performance.

Most memory will not work at CAS2 if it's branded CAS3. However, Crucial sells CAS2.5 DDR SDRAM that will run fine at CAS2- this is because of the double data rate factor built into the memory.

You can try the turbo- it might work. The worst that can happen is the system will crash or hang- if it does simply reboot and put the settings back to normal. You won't damage anything.

-MP Jesse

"Signatures Still Suck"

 

[Guest]

Thanks man, i'll try that.

 

[mrtj]

how do you check if your ram is cas2 or 3? how much of a speed increase does it give you?

 

[Arbee]

"Most memory will not work at CAS2 if it's branded CAS3. However, Crucial sells CAS2.5 DDR SDRAM that will run fine at CAS2- this is because of the double data rate factor built into the memory."

AFAIK, being able to run at CAS2 has nothing to do with DDR. But I may be wrong...

Cheers,

Arbee