15" MacBook Pro 2.4 GHz CPU Failure?

Discussion in 'MacBook Pro' started by markturnip, Jul 7, 2010.

  1. markturnip macrumors newbie

    Oct 14, 2007

    I have a late 2008 MacBook Pro 2.4GHz with 2GB of RAM.

    I can't say it's ever been magnificently fast, but I always blamed it on the memory. I've always intended on upgrading it, just never got around to it.

    I've also been away for 6 months, so haven't been using my computer.
    But today I've been trying to use Photoshop & it's hideously slow!

    Even the simplest task such as a desaturate command can take as long as 2 minutes! Admittedly on a large size document.

    I have iStat in the menu bar. When performing these tasks I would assume it would display some sort of indication it's processing in the CPU. But it displays Photoshop only using at much as 16% CPU & the memory having 500MB of inactive memory?

    My brother had been using my computer away & was constantly complaining of the speed of it. He suspects it could be a CPU issue.

    Am I correct in thinking Photoshop should be using more CPU when processing a task?

    Any help suggestions would be really appreciated!

  2. spinnerlys Guest


    Sep 7, 2008
    forlod bygningen
    Try this: Intel-based Macs: Using Apple Hardware Test, and see if you get any errors.

    Photoshop should at least access both cores. Try the radial blur on a bigger image (1600 x ....) with settings like ZOOM, AMOUNT=54 and see how much CPU is used. My version used 172% CPU.

    Also try some benchmark tools like XBench or GeekBench or Cinebench and compare the results with similar machines. GeekBench offers a result browser on their homepage.
  3. markturnip thread starter macrumors newbie

    Oct 14, 2007
    I'll try an Apple hardware test this evening, thank you.

    On your suggestion I used an image around 1600x1200, It processed it a bit too fast to see the CPU usage. But it looks like it uses around 54%...

  4. markturnip thread starter macrumors newbie

    Oct 14, 2007
    Is Photoshop limited to the percentage of memory it can use?

    My memory displays that Photoshop is using 1.22GB & has 500mb Inactive, with 21Mb Free.

    Also displays that I've swapped 2.53GB (3.00GB) with 1,300,000 Page Ins & 650,000 Page outs, since this morning around 11am - It's now 2:30pm. Is that a lot for that amount of time?


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