Problems disabling one CPU core

Discussion in 'Mac and PC Games' started by hauntedcity, Feb 16, 2008.

  1. hauntedcity macrumors member

    hauntedcity

    Joined:
    May 4, 2007
    #1
    Background: I've read that some older games (in this case Myst III) have problems with dual core CPUs and that disabling one core may fix the problems.

    Steps taken: In /library/Application Support/HW Prefs/CPU Palette, I can disable 1 core in Leopard (running 10.5.2). However, once I disable one core, the entire system pauses every few seconds. It makes it almost impossible to do anything.

    Any ideas why this is happening?

    Thanks,

    Doug
     
  2. marclapierre13 macrumors 6502a

    marclapierre13

    Joined:
    Jul 7, 2005
    #2
    I remember someone once saying, that removing the battery and hooking the charger up, will only power one core. It also makes it quieter, but reduces performance, because only one core is running. (+ a bunch of other technical hubalub)
     
  3. StealthRider macrumors 65816

    StealthRider

    Joined:
    Jan 23, 2002
    Location:
    Yokosuka, Japan
    #3
    Taking out the battery forces the CPU to run its cores at 1GHz, but I believe both of the cores do still run.

    What type of machine are you using?
     
  4. hauntedcity thread starter macrumors member

    hauntedcity

    Joined:
    May 4, 2007
    #4
    Good question! Intel MacBook Pro Core2Duo 2.16 with 3GB RAM.

    Actually, this issues takes a back burner, because I just realized the game I'm trying to play won't recognize the DVD in Leopard. So, if I can get the game to recognize the DVD, only then do I have to worry about the 2nd core.

    Sigh...
    :(
     
  5. StealthRider macrumors 65816

    StealthRider

    Joined:
    Jan 23, 2002
    Location:
    Yokosuka, Japan
    #5
    I've never tried to disable a core on a C2D, only my old C(1)D iMac. Maybe the architecture's changed to the point where performance drops significantly when a core is shut down. With the "smart cache", shared between cores, and some other functions, it's possible.
     

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