DDR3 ECC 1333MHz PC3-10600 identified as 1066MHz

Discussion in 'Mac Pro' started by 5050, May 21, 2013.

  1. 5050 macrumors regular

    Joined:
    May 28, 2009
    #1
    I recently flashed my MacPro4,1 to MacPro5,1 in order to install X5680 procs along with 96GB of 1333MHz RAM.

    With the CPU upgrade, the flashed MacPro5,1 should be reading the RAM at 1333MHz, however, my system is identifying it as 1066MHz.

    Any ideas as to why?

    Relevant System Information images attached below.
     

    Attached Files:

  2. TheDoc macrumors member

    Joined:
    Mar 18, 2008
    #3
    Maybe I'm getting my memory wires crossed, but isn't 1066mhz the max a MP will run at? It'll have no problem accepting 1333mhz but it'll just downclock it.
     
  3. MacUser2525 macrumors 68000

    MacUser2525

    Joined:
    Mar 17, 2007
    Location:
    Canada
    #4
    Mine shows me 1333mhz and as the second poster mentions it only did this after resetting the PRAM.
     
  4. GP-SE macrumors 6502

    Joined:
    Feb 27, 2013
    #5
    depends on the CPU installed, if the CPU installed supports 1333mhz, and you have a 5,1 (or flashed 4,1 to 5,1 firmware) it'll run at 1333mhz.
     
  5. TheDoc macrumors member

    Joined:
    Mar 18, 2008
    #6
    Aaahhhhh. Cheers!
     
  6. 5050 thread starter macrumors regular

    Joined:
    May 28, 2009
    #7
    That did the trick, thanks!!
     

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