Early 2009 Single Processor to Dual Processor

Discussion in 'Mac Pro' started by sunman, Jan 9, 2014.

  1. sunman macrumors newbie

    Jan 9, 2014
    I searched the forums and could not find any definite answers on this. I currently have a 4,1 early 2009 single processor MACPRO. I purchased the following items to upgrade to a dual processor MACPRO. Call me nuts but enjoy the challenge.

    1. Dual Processor Tray
    2. Dual SIX core processors
    3. 1333 MHZ MACPRO Compatable Memory
    4. Heat Sinks for both Processors.
    5. New ATI Video Card for MAC.

    I already installed the video card and upgraded the firmware with the standard 5,1 netkas hack. Will the upgrade above work? I am waiting on heat sinks tomorrow.
  2. EHuntington macrumors newbie

    Dec 23, 2013
    I've done something similar, and as long as you purchased the 4,1 processor tray, you're all set. I swapped a few CPU's and trays at the place I work, but they were all between 4,1. It always worked.
  3. MacUser2525 macrumors 68000


    Mar 17, 2007
    Doubt that dual tray is updated to the new firmware unless it is a 2010 model. If the 2009 model you will need to get some processors that are supported for that model then do a firmware rescue/restore then flash to the 5,1 firmware to enable the support for the new processors. The SMC firmware has to match on both the tray and the system board to work correctly which it will not if you have bought a 2009 dual tray that is not flashed.


    Edit: Now I think more you can just downgrade the firmware with the single tray no rescue needed still will need processor(s) to flash the dual tray though.
  4. branana macrumors member

    Jan 15, 2006
    Does getting the processor tray also entail getting the 2 heatsinks that go with it as well?
  5. sunman thread starter macrumors newbie

    Jan 9, 2014
    Yes you do require new heatsinks. The single processor uses one large heat sink. The dual processors use 2 smaller heat sinks.

    So what you are saying is I may have to get two stock original processors from a 2009 Mac Pro line up to complete the transaction?
  6. Umbongo macrumors 601


    Sep 14, 2006
    Work out how much you can sell your current system for and now much used dual CPU 2009 and 2010 models cost before you do this.
  7. xcodeSyn macrumors 6502a

    Nov 25, 2012
    As far as I know, you can't flash the SMC on the 4,1/5,1 MP as indicated here since no SMC updates were ever provided by Apple. That's why you have to use the 2009 processor tray to match the 2009 back plane (or system) board. Also the processor tray only contains the SMC, but no EFI Boot ROM as you seemed to imply. Instead the back plane board has both the EFI Boot ROM and SMC firmware.

    If the OP got the matching parts already, it would work just not very cost-effective as pointed out by Umbongo.
  8. MacUser2525 macrumors 68000


    Mar 17, 2007
    Don't know what your looking at when I check mine under Hardware of the system information it clearly states.

     Boot ROM Version:	MP51.007F.B03
      SMC Version (system):	1.39f5
      SMC Version (processor tray):	1.39f5
    You see that tray firmware so it is flashed at the time of upgrading as that is not what was there when I did it originally. It had the Mac Pro 4,1 firmware listed for all that. I'm not implying nothing but telling the OP that if the firmware does not match then he is going to have problems getting it done.
  9. xcodeSyn, Jan 10, 2014
    Last edited: Jan 10, 2014

    xcodeSyn macrumors 6502a

    Nov 25, 2012
    The processor tray SMC firmware never changed when you updated the EFI Boot ROM from 4,1 to 5,1, and stayed the same as 1.39f5. Just take a look at this post, a real 5,1 MP has the SMC version of 1.39f11, not 1.39f5. If you actually know how to flash the SMC version from 1.39f5 to 1.39f11 or vice versa, please share with us because it means we can interchange the 2009 and 2010/2012 processor trays without compatibility issues.

    Edit: Just to clarify, Apple seems to define firmware as both EFI Boot ROM and SMC, but only EFI Boot ROM can be updated for MP 4,1, not the SMC part.
  10. sunman thread starter macrumors newbie

    Jan 9, 2014
    To all the naysayers:

    I just successfully completed my upgrade to dual processors from a single processor. Perhaps the SMC has some validity but I cannot confirm this since the dual processor tray I ordered was from a 2009 MACPRO dual processor system. I went from a single quad processor to dual 6 core 2.8ghz processors. I did not want to fork over the money for 3.2 processors without first trying this out. I always upgrade later on. Screwing the heat sinks is very tricky as you can crush the pins in the socket. I used a little more than 2mm of washers.
  11. bornblind macrumors 6502


    Nov 19, 2008
    Where did you purchase the tray and other components? I have a 4,1 quad single processor MP and want to convert it to a dual processor system.
  12. h9826790 macrumors G4


    Apr 3, 2014
    Hong Kong
    I think the easiest way is to buy a loaded tray (or a used Mac Pro) from eBay. However, you may also go to here or here to get what you want.

Share This Page