How big is the difference between CAS 9 and 7?

[kaywalker]

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/applications/SearchTools/item-details.asp?EdpNo=4282860&CatId=4327

 

[capt_taco]

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/applications/SearchTools/item-details.asp?EdpNo=4282860&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.

 

[snurp85]

I would suggest using this instead:
http://www.newegg.com/Product/Product.aspx?Item=N82E16820227365

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/reviews/memory-scaling-i7,2325.html

 

[Mousemonkey]

Best answer selected by mousemonkey.

 

[Mousemonkey]

This topic has been closed by Mousemonkey