[SOLVED] iMac 5k GPU Heats Up To 105 Celsius??

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CCarmona95

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Mar 28, 2015
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Recently I've been using my brand new iMac 5k and I've been loving it! One thing that kinda bothers me though is that when I start playing a game called Total War my GPU temperature reaches up to 105 celsius and no more than that! What i find pretty funny though is that when I'm playing the game I Don't play it fullscreen, instead I play in a window and every time I tab from my game to my desktop my GPU temp drops in a blink of an eye back to 80 celsius and takes about 30 seconds from there to go back to 50 Celsius. My iMac doesn't get hot by touch though. But after seeing so many people experience this is this GPU meant to be ran like this and last me for a long time? i have the m295x 4GB with an i7 quad core. Any suggestions? Will these temperatures be safe and will it even last me more than 5 years like my Macbook Pro has?

Note: I have no lag and everything runs really smooth even when playing Total War on 5k on Ultra settings.
 
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TechyInAZ
Very strange, I think it's a sensor problem because overheating will cause the GPU to throttle back a ton, and the fans should be ramping up (are their fans?).

try using coretemp software.
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CCarmona95

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I'm actually using iStat. The fans do ramp up the most I've seen it go is about 2800rpm after that the GPU goes down to 85 Celsius and back to 105 once the fans ramp back down and same process happens again.
But like I said what I find extremely odd is that as soon as I click the tab to take a look at the stats, the temperature goes down very very fast back to 70°c and then to 50°c
 
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Bluetack

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Apr 2, 2015
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This issue is overhyped, there is a thread (almost 154.000 views - still counting) and the quintessence is: The gpu (only the m295x) has a dynamic clock rate that is adapted to the temps (its not a real heavy throttling like on other cpus/ gpus) and so everything still runs smooth - the clock rate adjustment is just marginally. But that seems to be sufficient.. 105°C/221°F is the programmed barrier. The real max specification for the gpu core is 125°C/ 257°F but you won`t ever reach such high temps. Dont worry :bounce:

PS: Here is the above mentioned thread: http://forums.macrumors.com/showthread.php?t=1815601
(If linking isn`t allowed, a mod should erase this)
 
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