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Thread: Performance impact of CAS latencies

  1. #1

    Default Performance impact of CAS latencies

    Well, I've been looking for an answer all over internet, but I can't seem to find a decent one. I know what CAS latency is, but what I'm wondering is how much would it change my daily life computer performance if I bought a DDR3-1333 RAM with 9-9-9 or 7-7-7.

    All I can find is really old benchmarks and plain explanations I've already memorized. If I can, I may request a benchmark of CAS latencies. (With same frequencies, of course.)

    Thanks.

  2. #2
    Join Date
    Nov 2008
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    GameStar (german PC gaming magazine) did a small test in one of their recent issues. They tested just one game and found less than 0.5% gain from the faster RAM.

    That will of course depend on your CPU cache. With a larger cache, RAM speeds matter less. But you know that already

  3. #3
    Join Date
    Nov 2008
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    if you need low latecy buy a opteron 6000 8-12core

    thats because you have 4 channel ram on every cpu means on the unganged mode you can handle 4 diverend packages on the same time..

    on an multicore app thats means 1/4 latency to an 128bit ganged dualchannel opteron 2222 for exampel!

    opteron 6000 is very cheap starts at 244 and singlesocket boards start @180!

    if you really need latency buy a Opteron6000!

  4. #4
    Join Date
    Jun 2010
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    A RAM modules certified for lower CAS may be able to overclock higher with a relaxed CAS.

  5. #5
    Join Date
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    There's no "real life" performance gain with lower RAM latencies. You will see a gain is pure memory benchmarks though.

    In other words, keep your money

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