GTX 775M or 780M?

Discussion in 'iMac' started by Cogi, Feb 22, 2014.

  1. Cogi macrumors newbie

    Cogi

    Joined:
    Feb 22, 2014
    Location:
    Amityville, NY
    #1
    Im getting ready to purchase my first Apple Computer. I am getting the 27" iMac and wanted to know what is your idea about the 775M 2GB and 780M 4GB.

    I want to know if you think its worth the upgrade. I sorta am looking for something future proof.
    Im a YouTube Partner so I want to play some indie games and maybe a few AAA titles. I want to play games like DayZ, 7 Days to Die, TF2, and maybe some Battlefield (rarely). Most of the games will be indie games. I am using my Xbox One and 360 for major games.

    I'll also be doing alot of video editing and using PhotoShop so I already decided on getting the Intel i7 and also a 1TB Fusion Drive.

    I looked at a chart that showed 2GB and 4GB comparison (I'm sure it wasn't with these actual cards but the memory they have)
    They played major games and in all of them they performed the same except one where it failed bad but because it was connected to 3 monitors which I'm not doing.

    Let me know what you think or let me know if there is an actual difference!
     
  2. yjchua95 macrumors 604

    Joined:
    Apr 23, 2011
    Location:
    GVA, KUL, MEL (current), ZQN
    #2
    The 4GB GTX780M will help greatly in speeding up rendering times.

    Fusion read/writes: 500/350 MB/s.
    Pure SSD read/writes: 750/720 MB/s (512GB), 710/650 MB/s (256GB)

    You may benefit more from a pure SSD because video is I/O intensive. Even if you were operating from solely the 128GB SSD in the Fusion, it's still way slower than the 256GB and 512GB SSDs. Generally, larger SSDs perform faster, but the performance gap between 128GB and 256GB is far larger than between 256GB and 512GB.

    I've attached a screenshot of the 256GB SSD's speeds in my 21.5" iMac.
     

    Attached Files:

  3. Cogi thread starter macrumors newbie

    Cogi

    Joined:
    Feb 22, 2014
    Location:
    Amityville, NY
    #3
    Dang! Thats fast. I mean I'll notice any speed difference. I've been using a 2010 Lenovo with a 5400RPM Hard Drive so as long I am not waiting 2-3 hours for a 15 minute video render. Im on a strict budget as well so thats why I was asking about the 780M if it was a better idea. I can deal with 500 350 MB/s vs 100MB/s or less.

    Also going to save up $300 more to buy the 32GB of RAM from Crucial in a few weeks.
     
  4. IA64 macrumors 6502

    Joined:
    Nov 8, 2013
    #4
    I don't think an SSD will boost your rendering speed or anything. At least not for me.

    I'm rendering a 4.6GB 30 seconds AVI movie using 32GB or RAM and core i7-4771.

    CPU usage 100%
    RAM usage 92% ( 29.5 GB)
    SSD I/O 2 %
    GTX780M load 6%
    GTX780M Memory used ( 682MB - 498MB by system )

    CPU Temp 87-91C
    Fan speed Max
    GPU Temp 54C

    Rendering time 10 minutes 2 secs.
    Resolution 1080p
    After Effects.

    Just my 2 cents.
     

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