FSB Bottleneck on 2009 MP

Discussion in 'Mac Pro' started by ggg05a, Mar 10, 2009.

  1. ggg05a macrumors regular


    Jan 11, 2009
    Hey All:

    Why is the FSB on the 09 MP at 1066 what then CPU is capable of running 1333? Would simple memory replacement fix this issues with MPs running dual x5550s and x5570s?

    Also, any ideas as to why Apple didn't make the W5580 available on the 09MP?


  2. eelmac macrumors member

    Mar 9, 2009
    This aint my topic area but i've never came across a CPU and ram that have the same FSB(not that i can remember anyway), currently in my PC my CPU is higher than my ram

    edit: hmmm i might have miss read that ;)
  3. bozz2006 macrumors 68030


    Aug 24, 2007
    Their is no FSB on the new mac pros. The nehalem chips replace the FSB with a high-speed internal bus called Quick Path Interconnet

    The RAM is 1066, not the FSB

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