Mac Pro 2009 - Where are the northbridge-chips?

Discussion in 'Mac Pro' started by FFder1., Jun 12, 2011.

  1. FFder1. macrumors newbie

    Joined:
    Feb 10, 2008
    #1
    Hey,
    i am an owner of a 2009 Mac Pro (2x2.26, 4.1).
    Because i am a friend of cool systems, I changed my graphic card fan and added an active cooling system for my RAM. The only hot parts of my Mac are still this mysterious northbridge chips (with ca. 70 °C).

    So is my questions: Where are this Northbride chips?
    A simple picture would be awesome.
    I ´ve recently read many debates about the heat of the Northbridge, but nobody wrote, where there are. So I don´t want to start a new thread concerning the topic, how hot the northbridge chips should be.
     
  2. 666sheep macrumors 68040

    666sheep

    Joined:
    Dec 7, 2009
    Location:
    Poland
  3. nanofrog macrumors G4

    Joined:
    May 6, 2008
    #3
    It's located on the daughter board under the heatsink next to the CPU socket/between the sockets on a DP version (same board the CPU/s reside on). See pics in link above.

    BTW, It's not really a Northbridge any longer, as the memory controller is now located in the CPU itself. The chipset contains the PCIe lanes and communicates with other parts on the board via a DMI (i.e. ICH = SATA, USB, Ethernet, PCI,...; PCI bus is used to communicate with other components not contained in the ICH itself, such as the Firewire controller).
     

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