DDR Ram CL

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pb

I have a stick of Crucial 512MB PC2700 CL2.5 in my Asus A7V8X. I am able to
overclock it slightly but have two options to choose from which are stable.
I can run the RAM at CL2.0 at DDR 166, or CL2.5 at DDR 180 - which would
give better performance?
 
pb said:
I have a stick of Crucial 512MB PC2700 CL2.5 in my Asus A7V8X. I am
able to overclock it slightly but have two options to choose from
which are stable. I can run the RAM at CL2.0 at DDR 166, or CL2.5 at
DDR 180 - which would give better performance?
Click to expand...

I think going from 2 to 2.5 is roughly equivelent to 10% FSB increase in
maximum bandwidth... so there's probably not much in it. Thats on my
nForce2 using a not very reliable benchmark, so I could be way off.

Run some benchmarks of your own and see. I'd be tempted to steer clear of
memory bandwidth benchmarks and go straight for something a little more
practical, aquamark3 or 3dmark if you play games.

Ben
 
I think going from 2 to 2.5 is roughly equivelent to 10% FSB increase in
maximum bandwidth... so there's probably not much in it. Thats on my
nForce2 using a not very reliable benchmark, so I could be way off.

Run some benchmarks of your own and see. I'd be tempted to steer clear of
memory bandwidth benchmarks and go straight for something a little more
practical, aquamark3 or 3dmark if you play games.
Click to expand...


In 3Dmark 2001 I got only about 3 marks more with the lower CL 2 rather than
2.5. Though attempting ddr400 at 2.5 got me about 80 more marks than at 333
(My RAM is stable at 400 once it has booted, but it usually doesnt boot).

From this it seems to me like theres no point worrying about CL? But that
cant be right because people obviously pay more for the lower CLs...
 
In 3Dmark 2001 I got only about 3 marks more with the lower CL 2 rather than
2.5. Though attempting ddr400 at 2.5 got me about 80 more marks than at 333
(My RAM is stable at 400 once it has booted, but it usually doesnt boot).

From this it seems to me like theres no point worrying about CL? But that
cant be right because people obviously pay more for the lower CLs...
Click to expand...

There are the other ram timings to consider also.

On my setup changing the RAS to CAS Delay setting one step from 2 to 3
dropped my 3dmark01 score about 200 points with a Ti4200 card.

Ed
 
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