Parellels desktop CPU assignment

Discussion in 'Windows, Linux & Others on the Mac' started by Willyee3, Jun 27, 2011.

  1. Willyee3 macrumors member

    Jun 20, 2010
    I was wondering if I should assign all my cores to parallels.. and would there be a downside in doing so...thanx!

    ps i dont run much on my windows anyways. so i dont think it would slow down my computer too much if i assigned them all... i just want windows to work fast when i am on it.
  2. alust2013 macrumors 601


    Feb 6, 2010
    On the fence
    Assigning all is a bad idea, regardless of what you're doing. You still have to have enough resources to run OS X as well. There's also no need for a bunch of cores for simple stuff.
  3. Willyee3 thread starter macrumors member

    Jun 20, 2010
    if i assign them all, windows and osx would be sharing cpu power as opposed to me just giving all the power to windows right? sorry noob question i know.
  4. simsaladimbamba

    Nov 28, 2010
    If your Mac has four processor cores and can support four threads (one per core) (only an example) and you assign all four cores to Parallels, then Mac OS X will be slower, as it has to "fight" for CPU time. But if you even it out (two cores for Parallels) then Mac OS X will be working quite good, as will Windows. I have a dual core Mac (with one thread per core) and I assigned one processor (one core) to my Windows VM in VMWare Fusion and Windows works quite okay. And Mac OS X does too.

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