Mac Pro 4,1 to 5,1 CPU questions

Discussion in 'Mac Pro' started by firewire9000, Jul 24, 2016.

  1. firewire9000 macrumors regular

    Joined:
    Sep 15, 2015
    #1
    Hi,

    I'm planning to buy a Mac Pro 4,1 with 2x2,26 Ghz quad core E5520, flash to 5,1 and change CPUs to 2x2,93 Ghz six core X5670 and put 4x8 GB 1066 Mhz ECC. There will be any problem? Massive update :D

    Thanks!
     
  2. joot macrumors member

    Joined:
    Nov 3, 2006
    #2
    Take your time...after firmware update, your rams will run @ 1333mHz
     
  3. h9826790 macrumors 604

    h9826790

    Joined:
    Apr 3, 2014
    Location:
    Hong Kong
    #3
    I will say this is a very "standard" update now, nothing special, all you need to know is the dual processor 4,1 use lidless CPU. So you either de-lid the CPU, or study the work around before you start to do anything.
     
  4. firewire9000 thread starter macrumors regular

    Joined:
    Sep 15, 2015
    #4
    Damn, true. So it will not work with stock heatsink without any modification? I have to remove IHS?
     
  5. pastrychef macrumors 601

    pastrychef

    Joined:
    Sep 15, 2006
    Location:
    New York City, NY
    #5
    You don't have to remove the IHS... You can use spacers to compensate for it...
     
  6. flowrider macrumors 601

    flowrider

    Joined:
    Nov 23, 2012
    #6
    Many, Many, Many threads on this forum discussing this very subject. And as pastrychef said, there is more than one way to skin this cat. Do a search and educate yourself on the two methods and what's required for this update.

    Lou
     
  7. ActionableMango macrumors 604

    ActionableMango

    Joined:
    Sep 21, 2010
    #7
    There are three methods:
    • Remove the lids (paid service or DIY)
    • Be very careful with tightening the heat sink, and adjust tightness to deal with CPU/memory faults
    • Add washers
    The CPU upgrade thread in my signature has notes and links to other threads where they go over these methods in detail.
     

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