CPU upgrade advice needed. cache related question..

Discussion in 'Buying Tips and Advice' started by zen.state, Dec 31, 2008.

  1. zen.state, Dec 31, 2008
    Last edited: Apr 1, 2012

    zen.state macrumors 68020


    Mar 13, 2005
  2. bvanlieu macrumors member

    Dec 28, 2008
    While I share your passion for keeping things going, at some point you have to move on. I did this with SCSI years ago...will do with with FW at some point :)

    I recently took a QS from a 733 (no L3) to 933. That to me was as a good value. After that, there was just too much diminishing returns in how much you are outlaying for a CPU upgrade and what you can buy on the used market.

    You can get QS units with DPs, MPs, heck if you are patient a G5 for a few hundred dollars on flea-bay.

    Bit more then that and you have CD2 Minis for sale.

    If you are dead set on the upgrade, then its a hard call between the two CPUs. The 7448 chip is a bit different micro-architecture so the behavior of the L3 size is not as with the older 7447 chip.

    Unless you can benchmark it with your exact programs/needs all you have to go off of is other benchmarks.

    I would wager a small amount of money you would see diminished returns going from 1.5 to 2.0 simply because of the other system level bottlenecks start to add up: unless the code was tight and could stay on CPU, the extra Mhz won't really be felt.

    - b
  3. velocityg4 macrumors 601


    Dec 19, 2004

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