Mac Pro Memory upgrade help

Discussion in 'Mac Pro' started by rueyloon, Aug 11, 2014.

  1. rueyloon macrumors regular

    Sep 24, 2013

    hi, I have a 2009 Mac Pro, 4.1, I've updated the firmware so it how shows as Mac Pro 5.1 under "About this Mac".

    I have 20gb of Ram at DDR3 ECC 1066MHZ

    4GB x 4 and 1 GB X 1

    1) any benefit in going to 1333MHZ Ram ?

    2) or just add more RAM overall and it will be better ?

    "Sharing is Caring" section

    I used to doing 3-5 minute videos, and hardly see the RAM usage go over 10gb.

    Now I just got a series of videos that are 30 to 45 minutes long and I can see that RAM is completely used up.

  2. h9826790 macrumors G4


    Apr 3, 2014
    Hong Kong
    1) Unless you upgrade your CPU as well, otherwise, NO, you want see any benefit. On the other hand, if you manage to run all the RAM in 1333MHz, it will give you about 5% extra performance in totally when running benchmark software. However, in real world, it's hard to feel the difference. And in general, run the RAM in triple channel configuration is more important than run them in 1333MHz when considering performance.

    2) IMO, YES. There is no need to buy 1333 RAM to replace your current 1066 RAM. As you can see, Mavericks will use all your RAM for caching, so the system normally can benefit more from more RAM rather than a little bit faster RAM.

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