Northbridge on Mac Pro 1.1

Discussion in 'Mac Pro' started by maxp, Nov 22, 2011.

  1. maxp, Nov 22, 2011
    Last edited: Nov 22, 2011

    maxp macrumors member

    Oct 16, 2006
    Hi all,

    I have a divided opinion from work colleagues about the location of the northbridge on our 1.1 mac pros.

    Some say it is at the 'top' (nearest the disk drives), some say it is at the 'bottom' (nearest the ram).

    Can anyone confirm 100% which one of these it is?


  2. Dark Dragoon macrumors 6502a

    Dark Dragoon

    Jul 28, 2006
    Pretty certain it's the bottom one, which when installed is located inside/under the memory cage.
  3. 4JNA, Nov 22, 2011
    Last edited: Nov 22, 2011

    4JNA macrumors 68000


    Feb 8, 2006
    looking for trash files
    it's the big one Jim...

    with no documents to go on, i'd go with a comparison to similar peecee xeon boards.

    from building servers for a long time, lots with that/similar chipset, the bigger heatsink will always be the northbridge. lots of similar Intel and Supermicro boards with this chipset don't even have a cooler on the southbridge, so probably just Apple being 'extra' careful and trying to make it run quiet. best of luck.

    EDIT: to add, on top of being 100% sure based on sink size, i can also see the cable going under the edge of the sink that likely goes to a temp diode glued/stuck to the bottom of the sink. the PN and the Foxconn number don't bring up anything on google, but on my 1,1 there is a temp reading for Northbridge, and nothing for Southbridge. again just my 2 cents.
  4. 666sheep macrumors 68040


    Dec 7, 2009

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