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CAS Latency Real-World Effects?

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February 17, 2013 10:41:44 PM

I've decided that for my first build 8GB of RAM (2 x 4GB) will probably be more than enough for gaming. Now I need to know how much of a real-world effect CAS latency will have on my performance. By "real-world" I mean that obviously DDR3 1600 RAM running at 7-7-7-24 is faster than the same RAM running at 9-9-9-24. But, will I notice the difference in FPS or system responsiveness? If not I'll save a decent amount of money and go with the CAS 9. Here are the three sets of RAM I'm looking at. Thanks for any advice!

CAS 7:
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

CAS 8:
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

CAS 9:
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

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a c 80 } Memory
February 17, 2013 11:58:09 PM

I think you are better to buy the 1600MHz cl9 RAM and use the money to buy better GPU or put into your bank. Read the review the cl9 RAM is better than cl7/cl8.

http://www.anandtech.com/show/4503/sandy-bridge-memory-...
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February 18, 2013 2:12:55 AM

cin19 said:
I think you are better to buy the 1600MHz cl9 RAM and use the money to buy better GPU or put into your bank. Read the review the cl9 RAM is better than cl7/cl8.

http://www.anandtech.com/show/4503/sandy-bridge-memory-...


THANK YOU! I was beginning to think that nobody was going to answer my question.
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February 18, 2013 2:13:00 AM

Best answer selected by martinuv.
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a b } Memory
February 18, 2013 2:47:28 AM

Between the absolute fastest RAM and the absolute slowest RAM, there is only a 8-10% difference in most real-world workloads. If you put the $40 difference in a better GPU, you can get 30-50% higher frame rates.

So RAM speed is not really worth worrying about that much unless budget is a non-issue or you have a specific application in mind that absolutely requires it.
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