Upgrade CPU Mid 2007 iMac

Discussion in 'iMac' started by raystrack, Dec 20, 2013.

  1. raystrack, Dec 20, 2013
    Last edited: Dec 20, 2013

    raystrack macrumors newbie

    Dec 18, 2013
    I've read the X7900 is a safe upgrade for the T7700, having the same L2 cache and bus speed but the Geekbench results show only a modest improvement. The T9900 has a more impressive score with higher bus speed and L2 cache.

    I'd appreciate advice on whether the T9900 is suitable.
  2. nandor690 macrumors regular


    Jun 25, 2011
    T9900 won't work. The FSB on that cpu is 1066. Our 7,1 iMacs only support 800. So if you use that cpu the iMac won't boot to the desktop. Go with the T9300 and you can install macOS Sierra.

    PS. I know this post is old but maybe if you still have the computer you will find this helpful

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