GTX 780M temperatures?

Discussion in 'iMac' started by mogens, Feb 27, 2014.

  1. mogens macrumors regular

    Jan 24, 2010
    I've been playing Tomb Raider 2013 all night on my new 27" iMac i7 on maxed out settings :) After playing I immediately switched to iStat pro and noticed that the GPU temperature was around 85 degrees C. After 15 minutes it feel to around 42 C.
    85 C. is a little high? Or is it normal for the GTX 780M?
  2. IA64 macrumors 6502

    Nov 8, 2013
    I don't really know if this helps but under Windows, my 780M hits 90C

    Even on 60-70% CPU load and fans running full speed, CPU temperature is in the 90's C

    Idling, my GPU temp is around 50C and my CPU is 55C.
  3. Nyy8 macrumors 6502a


    Jun 12, 2011
    New England
    I think the max temp rated for that card is 95C.

    Pro Tip: The ambient temperature in the room can really help to bring down temps.
    If your in a room that's 65F degrees during Winter, you may only ever hit 50C-70C

    While, in the summer if your room is 70 or 75F you may see temps up to 85-90C when hardcore gaming. Just something I've noticed over the course of two years with my iMac.
  4. CH12671 macrumors 6502

    Dec 29, 2013
    Southern US
    says thermodynamics

    EDIT: Had my laws confused...
  5. IA64 macrumors 6502

    Nov 8, 2013
    My room Temperature is 17C ( cold indeed ) and I'm having those temperatures I mentioned. Kinda worried about summer time.
  6. quagmire macrumors 603


    Apr 19, 2004
    When idling, my 780M is around 36-40 C. When playing X-Plane it is between 67-72 C. But that is because I force the fan to 1900 RPM using iStat Menu's when I play X-Plane. I don't like Apple's stock fan control.
  7. Truthfulie macrumors regular

    Dec 18, 2013
    It's normal for GPU to get hot as you say your's got to, when running graphically intensive games. Though iMac's cooling is not bad for its size and form factor, it's also not a ideal solution for running intensive games for extended periods. Keep the ambient temperature low as possible, it does help.
  8. MacsRgr8 macrumors 604


    Sep 8, 2002
    The Netherlands
    If it's nice and warm outside, might as well play outside... no temp issues with the 780M then. :p
  9. Ainze macrumors regular


    Feb 28, 2010
    This really is quite normal. In my years of gaming on Mac I actually expect temperatures between 80 and 95. Apple like their computers to run quiet so the fan works only as hard as it has to bring the temperature to a safe limit. When summer comes, you may find your fans are working harder, and giving you the same upper temperature. A cooler ambient temperature will help, of course, but often just to take some pressure off the fans.

    For comparison, my mbp did four years of gaming at 95C and 6000rpm and it's still happy as can be.
  10. Johnf1285 macrumors 6502a


    Dec 25, 2010
    New Jersey
    Just wanted to chime in.

    I've been playing a lot of Divinity: Original Sin and the game has many shadow and lighting effects that run surprisingly well in OS X. I have the settings in the higher mid range / lower high range (if that makes sense). They're not totally maxed out, but the game still looks great and achieves 60fps. I noted the GTX 780m hit 93c while playing.

    I've had several iMacs and other Macs over the years and have gamed on them all, so I'm not too worried about it. They let the computers hit higher temps so long as it's within spec.
  11. Wreckie macrumors regular

    May 9, 2011
    I would say this is normal under heavy gaming conditions. I once had about 98 Degrees with 6970M after playing game.
  12. Johnf1285 macrumors 6502a


    Dec 25, 2010
    New Jersey
    Just a follow up...

    Noticed the 780m hit 95c last night while gaming. Fan finally kicked up to about 1600rpm to keep it from going any higher than 95c.

    Not worried about the temps too much, as it is a laptop part and the system is (hopefully) designed to keep everything within thermal limitations before any damage occurs. Just thought it was interesting that something needed to hit its thermal limit before the fan actually ramped up higher than the default 1200rpm
  13. h9826790 macrumors G4


    Apr 3, 2014
    Hong Kong
    Unless you clearly feel the graphic card is thermal throttled (e.g. significant FPS drop). There is nothing to worry about. The iMac is designed to be as quiet as possible. You can increase the fan speed by some 3rd party software to lower the temperature. However, it won't give you any performance boost but more noise.
  14. insane79 macrumors 6502

    Aug 20, 2008
    95c is not something i would take lightly, isn't that the max recommended temp for the card from nvidia or is it 100c? If it was bootcamp it would be so so but a game on osx making those temperatures is weird, is it very hot ambient where you game?
  15. AxoNeuron macrumors 65816


    Apr 22, 2012
    The Left Coast
    When gaming? Of course it's going to get hot when's a mobile part, very different from a desktop GTX 780 especially when it comes to thermals. Perhaps you should turn down your graphics settings if it's getting that hot.
  16. Johnf1285 macrumors 6502a


    Dec 25, 2010
    New Jersey
    No, ambient temp is 72F. The game is Divinity: Original Sin. It surprisingly runs incredibly well in OSX with a lot of eye candy turned up. I may dial it down a bit.

    But being that it is a mobile part I am not too too worried.
  17. insane79 macrumors 6502

    Aug 20, 2008
    yup the ambient temp seems fine, guess thats the way it is for the gtx780m.
    Happy gaming & don't bother about temps..
  18. Neodym macrumors 68000


    Jul 5, 2002
    About time for Apple to get Maxwell chips into their Macs...
  19. insane79 macrumors 6502

    Aug 20, 2008
    on a second note have you been keeping an eye on your cpu temperatures when playing this game?


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