256 or 512 VRam?

Discussion in 'iMac' started by Cptow, Aug 25, 2010.

  1. Cptow macrumors newbie

    Joined:
    Jul 15, 2010
    #1
    Hi Guys,

    Is there a difference watching videos from You Tube or dvd with a higer vram?
     
  2. Bennieboy© macrumors 65816

    Bennieboy©

    Joined:
    Jan 15, 2009
    Location:
    england
    #2
    not really, youtube uses cpu because the videos are flashed based, and dvds, meh it's neglible you wouldnt notice a difference between 256 and 512Mb ;)
     
  3. spinnerlys Guest

    spinnerlys

    Joined:
    Sep 7, 2008
    Location:
    forlod bygningen
    #3
    You can watch YouTube videos and video DVDs on Macs with Intel integrated graphics if you want, like the 2006/7/8 MacBooks or the Mac minis or any iMac since 2006/7.

    The CPU is important, the GPU is not really in use during playbacks of those kinds of video, except the displaying of it.
     
  4. DannyBres macrumors 65816

    DannyBres

    Joined:
    Oct 30, 2007
    Location:
    UK
    #4
    I believe HTML5 and flash 10.1 use the GFX card acceleration for youtube! so you would get better performance for 720p 1080p or 4k :)P) playback!
     
  5. Cptow thread starter macrumors newbie

    Joined:
    Jul 15, 2010
    #5
    Oh....i still thought the 512vram can improve the video quality of the full screen video. :D
     
  6. daneoni macrumors G4

    daneoni

    Joined:
    Mar 24, 2006
    #6
    512MB will only help you when you're driving a hi-res external display AND doing intensive graphic work like gaming or 3D rendering.
     
  7. mulo macrumors 68020

    mulo

    Joined:
    Aug 22, 2010
    Location:
    Behind you
    #7
    I don't get it, why is vram so important for gaming and rendering?
     
  8. daneoni macrumors G4

    daneoni

    Joined:
    Mar 24, 2006
    #8
    On their own its now but when you're also driving a large external or two displays it becomes so.
     
  9. CaoCao macrumors 6502a

    Joined:
    Jul 27, 2010
    #9
    Windows users will claim you must have 1GB for the 27" iMac's resolution to game
     
  10. TMRaven macrumors 68020

    TMRaven

    Joined:
    Nov 5, 2009
    #10
    Which isn't true, really.

    More importantly you want to look for memory bandwidth. Graphical intensive stuff like shading, lighting or anti-aliasing take up memory, the higher the memory bandwidth, the more amount of this stuff you can do at a time. Having the extra vram is only good as a buffer so the gpu doesn't have to relegate itself to much slower system ram or hdd memory if it has to.

    High memory bandwidth is achieved through use of quad data rate memory (gddr5) and high bus widths, most importantly.
     

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