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Upgrading RAM: DDR3 10600 or 10666?

Discussion in 'Hardware Components and Aftermarket Upgrades' started by computerstriker, Mar 4, 2010.

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  1. computerstriker

    computerstriker Notebook Evangelist

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    Hey guys,
    I'm thinking of upgrading the RAM in my laptop(see signature).
    According to CPUID, I have DDR3 1333 PC3 10700 RAM.
    However, I don't see any type of RAM that is that is 10700. I only see RAM that is 10600 and 10666. Which one do you guys think I should get?
     
  2. Pitabred

    Pitabred Linux geek con rat flail!

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    10666. Anything DDR3 1333 should be fine. If you get DDR3 1066 you'll lower the performance of your existing DIMM(s) down to 1066 levels.
     
  3. computerstriker

    computerstriker Notebook Evangelist

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    Thanks for the quick responce PitaBread lol.
    Anyways, the DDR3 10600 actually runs at 1333mhz as well. both of them do. I was just wondering which one would run better. 1333 DDR3 10600 or 1333 DDR3 10666
     
  4. Pitabred

    Pitabred Linux geek con rat flail!

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    Check the CAS latencies, see if you can get those to match with what's in your machine and you'll get the best results. As a general rule, the 10666 should be "faster" than the 10600, but they may even be identical and simply just a listing difference. Either way, you'll be looking at sub-1% performance differences, stuff you may not even see in benchmarking programs. Match the latencies (or go better), match the 1333, and you're good to go.
     
  5. nacholambre

    nacholambre Notebook Consultant

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    I highly suggest getting the 10666 RAM. Great speed! Have fun with it!
     
  6. MidnightSun

    MidnightSun Emodicon Super Moderator

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    Technically speaking, there is no such thing as PC3-10666 DDR3 RAM - it's an unofficial way that some manufacturers name their PC3-10600 DDR3 RAM modules, for obvious reasons - people think they perform better.

    PC3-10666 RAM is a misnomer that is derived from the peak transfer rate of PC3-10600 RAM (10667 MB/s). As long as the timings are the same, there is no difference between PC3-10666 and PC3-10600 RAM, as they both run at 1333MT/s (therefore, the standard name is DDR3-1333).

    The official naming conventions, as delineated by JEDEC, can be found here.
     
  7. sgogeta4

    sgogeta4 Notebook Nobel Laureate

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    Again, there is no basis on this claim. Memory speed and latency are all marketing terms, in real life, the memory is pretty much never the bottleneck and hence increasing the values to an arbitrary value hold no real difference in performance.
     
  8. devilcm3

    devilcm3 Notebook Deity

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    indeed

    its the same as DDR2 case
    PC2-5300
    PC2-5400

    only the timings are different
     
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