Mac Pro 4.1 2009 board that support CPU-Tray with single CPU

Discussion in 'Mac Pro' started by ammoune78, Oct 20, 2018.

  1. ammoune78 macrumors newbie

    ammoune78

    Joined:
    Oct 20, 2017
    #1
    Hi,
    I've found on everymac, that my replacement logicboard, only support single CPU. While my faulty board support double cpu, maybe this is why the CPU Fans on the double CPU-Tray are running at full speed. Is there a trick to solve that problem?
    Thanks
     
  2. tsialex macrumors 601

    tsialex

    Joined:
    Jun 13, 2016
    Location:
    Brazil
    #2
    This is a no-issue.

    All 4,1 and 5,1 backplanes are EXACTLY the same, the only difference from 2009 to 2010/2012 is that the 2009 come from factory with SMC 1.39f5 and the 2010/2012 ones with 1.39f11. Zero diff between single and dual Mac Pros.
     
  3. kohlson macrumors 68000

    Joined:
    Apr 23, 2010
    #3
    May I ask a point of clarification?
    A friend with a 2010 single CPU wants to upgrade to a dual CPU. Does he just need a dual CPU processor board?
     
  4. tsialex macrumors 601

    tsialex

    Joined:
    Jun 13, 2016
    Location:
    Brazil
    #4
    He needs to buy dual 2010/2012 CPU processor board, 2009 will mismatch the SMC and all fans will run at full RPM.
     

Share This Page

3 October 20, 2018