[rMBP] Nvidia 650M Driver for Paralells/Virtual Machine

Discussion in 'MacBook Pro' started by WillTC, Aug 25, 2012.

  1. WillTC macrumors newbie

    Jul 13, 2012
    Hi there. I just installed Windows 7 32-bit with Parallels and tried downloading CPU-Z and GPU-Z. Apps that show information about the CPU/GPU. The CPU-Z displayed the info just fine. But GPU-Z didn't. No information was there.

    So I was wondering, where I could get the correct drivers from? Any links would be HIGHLY appreciated.

  2. NMF macrumors 6502a


    Oct 27, 2011
    Windows on Parallels uses Parallels custom video driver (it has to). If you download an official nVidia driver it'll mess things up.
  3. WillTC thread starter macrumors newbie

    Jul 13, 2012
    Any idea how?
  4. NMF macrumors 6502a


    Oct 27, 2011
    Because it's a virtual machine that doesn't have direct access to your system's hardware. With Parallels, Windows isn't running like it does in bootcamp because you've already booted into OSX. Parallels creates what's called a "virtual machine," essentially creating a fake hardware back-end to run Windows inside of OSX itself (hence the need to use Parallels video drivers -- Parallels is essentially tricking Windows into thinking it has access to a video card). If you want to use the real video drivers from nVidia then bootcamp is the only method. If you want to use an emulated solution like Parallels, you have to use their custom drivers in order to virtualize the operating system. That's just the way it is.
  5. vanc macrumors 6502

    Nov 21, 2007
    Install the "Parallels Guest Tools" and done. If you let the Parallel wizard doing the installation, it will install for you.

    Most desktop/server CPUs produced the last 4 years (about) support hardware virtualization. Intel calls it VT-x. For virtual machines, they see almost the same CPU features as host. So CPU-Z works (almost) as expected. But for GPU, so far, there are no virtualization support yet. Virtual machine software have to simulate some generic graphics cards. So GPU-Z can not see the physical GPU.
  6. ayeying macrumors 601


    Dec 5, 2007
    Yay Area, CA
    Our CPUs also support VT-d which is a direct connection to the I/O, which can use the real graphics card and other items directly inside a virtual machine. Parallels' Workstation Extreme supports this but it is directed for very specific machines and hardware.


    The technology/software just isn't available for the average consumer yet.

Share This Page