GTX 780 3gb vs GTX780 6gb? What does VRAM really do for your GPU?

Discussion in 'Mac Pro' started by Korican100, Jul 13, 2014.

  1. Korican100 macrumors 6502a

    Korican100

    Joined:
    Oct 9, 2012
    #1
    To Edit 4k/RAW video in Final Cut Pro x.
    Also, 3d rendering via plugin through After Effects.
    One Dell 29" ultrawide monitor.

    Will the extra 3gb gpu memory be significant in anyway?
    What exactly is the benefit of more memory for a GPU?
     
  2. CASLondon macrumors 6502a

    Joined:
    Apr 18, 2011
    #2
    If you are primarily FCX user, you might want to consider the dual AMD equivilent of firepro, I forget what the model number but its around here. That will be optimised for that set-up down the road.

    Otherwise, vram is heavily used by things like flight simulators like X-plane, as well as your pro video apps.

    It doesn't really impact things like rendering time, which will be down to CUDA cores etc.
     
  3. riggles macrumors 6502

    Joined:
    Dec 2, 2013
    #3
    The added VRAM simply allows you to handle larger or more complex scenes, if you're 3D rendering. Rendering doesn't happen any faster. Whether this added memory is valuable to you depends on how much you currently use.
     
  4. Korican100 thread starter macrumors 6502a

    Korican100

    Joined:
    Oct 9, 2012
    #4
    so If I had low vram, and was handling a large and complex scene. The GPU would write to local ram (Which would be slower?) how does that work?
     
  5. librarian macrumors regular

    Joined:
    Sep 24, 2011
    #5
    It depends on the software. After effects for example when out of memory it fails to render and stop. Other applications with cuda may simply shut down or crash because they need to load the entire scene directly in vram in order to render it and cannot off-load to system ram.
    (This is pretty much the case to most raytrace render engines with detailed scenes).
    I guess 3 gb should be fine for you. Are you going to use plug-ins like Element 3d?
     
  6. fuchsdh macrumors 6502a

    Joined:
    Jun 19, 2014
    #6
    If he's using Element, then the 6GB isn't really needed. Element is a very nicely written piece of software that hums using my FX 4800--a GTX 780 would be even better if he's using complex scenes but I doubt he'd have crazy amounts of chug either way.
     
  7. Prince134 macrumors 6502

    Joined:
    Aug 17, 2010
    #7
    Dual hd7970

    Dual HD7970
     

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