4GB vs 5GB

Discussion in 'MacBook Pro' started by leons, Apr 24, 2014.

  1. leons, Apr 24, 2014
    Last edited: Apr 24, 2014

    leons macrumors 6502

    Apr 22, 2009
    I inherited a mid-2009 Macbook Pro w/2GB RAM. I want to upgrade it to 4GB. I understand that the best performance is achieved with matched RAM. I have read some forums that imply that unmatched RAM will suffer a 10-15% performance degradation. Here's my question:

    Would overall performance be better if I buy 1 4GB RAM, and pair it with a ! GB already in there (giving me a total of 5G)? Or, should I remove both, and buy 2 2GB (for a total of 4GB).

    Which choice is better overall? (The machine is used primarily for web surfing, watching videos, and some financial applications with real-time charts/graphs).
  2. raptor402 macrumors 6502

    Jun 30, 2011
    5 GB won't give you as much of an edge in capacity over 2*2GB as 2*2GB would give over 5GB in performance and stability.

    You should go for 2*2GB. If you plan to keep the laptop for a while (2 years or more), you might want to consider 2*4GB. But then again, your money would be better spent on an SSD.

    Best of luck!
  3. Meister Suspended


    Oct 10, 2013
  4. brdeveloper macrumors 68020


    Apr 21, 2010
    If you have a 9400m GPU, I think your model supports up to 8GB (not officially). Get 2x2GB or 2x4GB (if supported) and a 120GB SSD at minimum. Be happy.
  5. wytwolf macrumors regular

    Apr 23, 2012
    yeah I had a look on everymac.com and both mid 2009s are listed as able to take 8GB. Officially apple states only 4 but the laptop can accept and use unto 8. Offically my macbook pro can only take 8 but i have 16 installed.
  6. Hieveryone macrumors 68030

    Apr 11, 2014
    From what I know 4GB is a bit low these days but 2x2 is definitely better. When ram prices drop I would consider 8GB RAM. I have 8GB ram and I often use 7.5GB RAM just watching youtube videos and leaving applications open.

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