Mac Pro 2009 Memory Speed

Discussion in 'Mac Pro' started by Sg335man, Sep 27, 2018.

  1. Sg335man macrumors member

    Joined:
    Mar 13, 2018
    Location:
    Northwich Cheshire UK
    #1
    Hello I would be more than grateful to get advice on memory speed on a Hacked 2009 Mac Pro 2 x 2.66GHz Quad Core Xeon CPUs NOW 5,1

    I have installed Nyix HMT42GR7MFR4A-H9 DDR3 1333Mhz 4 x 16GB in 4 of the 8 slots. However the computer is saying the speed is 1066Mhz? Is that because of the 2.66 CPUs? I have a done PRAM reset it still says the same. I presume once I install CPUs like the X5690 Westmere or from 2010-2012 etc The computer will recognise the higher speed? Thanks DH
     
  2. t8er8 macrumors regular

    t8er8

    Joined:
    Dec 4, 2017
    Location:
    Quebec, Canada
    #2
    Youll need to upgrade your cpu to something like the x5690’s to get the 1333mhz
     
  3. tsialex macrumors 601

    tsialex

    Joined:
    Jun 13, 2016
    Location:
    Brazil
    #3
    You have Xeons that the memory controller works up to 1066MHz, others works up to 1333MHz. When you install 1333 memory with a 1066MHz Xeon, memory will run at 1066MHz. If you change your Xeon to a newer one, memory will be correctly identified and run at 1333MHz.
     
  4. Sg335man thread starter macrumors member

    Joined:
    Mar 13, 2018
    Location:
    Northwich Cheshire UK
    #4
    Thanks I thought as much. Was not sure if the CPUs in there would recognise the 1333mhz ram speed
     

Share This Page

3 September 27, 2018