Memory confusion!

spireite

spireite

spireite

Associate
Joined
24 Jun 2003
Posts
46
I've browsed around and finding memory timings confusing.

Assuming that I'm considering overclocking, whats the benefit of one of the other? Assume E2180 and Asus P5K or Abit IP35 based boards).

Looking at these examples which are different timings.. and the CAS4 is more expensive of course. Does the CAS4 give any advantage or not in OC'ing?

Corsair 2GB DDR2 XMS2-6400C5 TwinX (2x1GB)
800MHz RAM Speed, CAS 5-5-5-12 Timings, 1.8-2.2v VDIMM, Lifetime Warranty

Corsair 2GB DDR2 XMS2-6400C4 TwinX (2x1GB) Corsair 2GB DDR2 XMS2-6400C4 TwinX (2x1GB)
800MHz RAM Speed, CAS 4-4-4-12 Timings, 1.8-2.2v VDIMM, Lifetime Warranty with Corsair.

Thanks for your help!
 
CAS4 memory runs at tighter timings, the tighter the timings the more 'efficient' the memory is and the faster (bandwidth wise at the same speed) it becomes.

CAS4 memory is also usually higher quality and as such is usually capable of overclocking higher than CAS5 memory.

Also, you are able to run CAS4 memory at CAS5 for even further clocking potential.
 
5-5-5-x memory tends to be close to its maximum clock.

4-4-4-x memory will usually have a fair bit of clocking left in it, some at 4-4-4-x and then some more at 5-5-5-x.
 
So, in practice purchasing CAS4 is advised. What confused me further was the fact a lot of specs in the Gen Hardware forum that are advised generally seem to be CAS5 based. Presumably, the extra tenner or so for CAS4 is worth it then.
 
Well you have to remember that you won't need good clocking memory with an E2180. It has a high multiplier and will clock well with a relatively low FSB.
 
You can't unlink the memory on the P35 boards, and running on a faster divider gives very little in return.

Tho personally I would recommend 4-4-4-12 memory as it's just as cheap these days anyway.
 
best memory to buy and i would recommend it highly, there garantee`d Micron d9 interconnects...

Crucial Balistix Tracers pc6400
 
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