Mac Pro RAM upgrade: higher clock will work?

Discussion in 'Mac Pro' started by zopiro, Aug 3, 2014.

  1. zopiro macrumors member

    Oct 1, 2010
    I'm planning a RAM upgrade on a Mid-2012 Mac Pro (1xQuad 3.2, with factory DDR3 3x2=6GB 1066 ECC Ram). Will any 1333 Mhz ECC memory work?
  2. h9826790 macrumors G4


    Apr 3, 2014
    Hong Kong
    I won't say any RAM will work, but most of the 1333MHz ECC UDIMM should be OK (as long as it support to run at 1066MHz CL7)
  3. flowrider macrumors 603


    Nov 23, 2012
    The stock RAM that came in your machine is 1333MHz rated RAM. The OEM 3.2 GHz Quad Core CPU (W3565) will only handle RAM speeds up to 1066MHz. So it isn't the RAM that's holding the memory speed back, it's the CPU.


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