MP 1,1-5,1 Changing Apple EFI for Xeon microcode

Discussion in 'Mac Pro' started by alexffff, Aug 9, 2019.

  1. alexffff macrumors newbie

    Joined:
    Aug 26, 2017
    #1
    I have Mac Pro 3,1. I have just bought 2x Xeon E5450 SLBBM E0 stepping and found that there are unsupported by my Mac Pro.

    I tried to google for this problem and found that only SLANQ C0 stepping works with it.

    SLANQ has CPUID 10676
    SLBBM has CPUID 1067A

    The MacPro 3,1 firmware has the microcode for the SLANQ (CPUID 10676).

    Is it possible to edit MacPro 3,1 firmware and add support of SLBBM (CPUID 1067A)?
     
  2. LightBulbFun macrumors 68020

    LightBulbFun

    Joined:
    Nov 17, 2013
    Location:
    London UK
    #2
  3. alexffff thread starter macrumors newbie

    Joined:
    Aug 26, 2017
    #3
  4. reukiodo macrumors regular

    reukiodo

    Joined:
    Nov 22, 2013
    Location:
    Earth
    #4
    Regardless of OS, you will need to update the microcode in the firmware before the computer will even boot with those CPUs installed.
     

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3 August 9, 2019