Tom's Hardware > Forum > Motherboards & Memory > Memory > How big is the difference between CAS 9 and 7?

How big is the difference between CAS 9 and 7?

Forum Motherboards & Memory : Memory - How big is the difference between CAS 9 and 7?

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kaywalker   10-07-2009 at 03:05:41 AM

I've read a lot of reviews but when it comes to actually picking a 6gb set I still don't know what to do. Is there much difference between the two? Should I save the money and send it somewhere else? What if the price difference is 20-30?

This is for an i7 system and I'm planning to OC it a bit if possible.

How is this ram for example.
http://www.tigerdirect.ca/applicat [...] CatId=4327

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Message edited by kaywalker on 10-07-2009 at 03:14:50 AM
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capt_taco   10-07-2009 at 09:05:15 AM

kaywalker wrote :

I've read a lot of reviews but when it comes to actually picking a 6gb set I still don't know what to do. Is there much difference between the two? Should I save the money and send it somewhere else? What if the price difference is 20-30?

This is for an i7 system and I'm planning to OC it a bit if possible.

How is this ram for example.
http://www.tigerdirect.ca/applicat [...] CatId=4327



The difference is about 25% in favor of the 7 latency over 9.

But also make sure the clock speed of the lower-latency memory is the same to begin with. The "true" speed of the memory is the clock speed divided by the latency. So if you have a stick of memory at 7 latency and 1333 MHz, a stick at 9 latency but 2000 MHz would still be faster.

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snurp85   10-07-2009 at 04:36:31 PM

I would suggest using this instead:
http://www.newegg.com/Product/Prod [...] 6820227365

But really it is not going to make a big difference between 1333 and 1600MHz, or CAS 7 or 9. Toms Hardware did a review compare the differences between speed and CAS timings: http://www.tomshardware.com/review [...] ,2325.html

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