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neoelectronaut

Cancelled
Original poster
Dec 3, 2003
3,417
2,093
After about an hour of playing Team Fortress 2 my iMac is running noticeably hotter. Will it heat up to system-damaging temperatures or will it be okay?

I'd rather not kill my iMac prematurely (Like I assume happened to my 2008 model, whose Logic Board died while I was playing TF2) if I can avoid it.
 

Garrod

Suspended
Nov 13, 2008
194
105
UK
Which model of iMac do you have? My 2009 (I think it was 2009) gave up the ghost after heavy gaming (via BootCamp) - the GPU packed in which was probably due to it getting very hot; Apple didn't specifically say that was the cause but the woman at the Genius Bar mentioned it whilst doing preliminary tests.

As for temperatures, my current iMac (specs in signature) does fine in terms of heat dissipation. When booted into Windows and playing something like GTA V the fans very occasionally fire up for a few seconds once in a while but it brings the temperature right down again. It's three years old later this year and I've not had any trouble with it.
 

TheGreatWumpus

macrumors regular
Sep 21, 2012
180
20
Vermont
I used to use a small fan pointed an the back/side of my imac to help with heat. But that was a 2010 model. The new one I got some time ago does not seem to ever overheat, even while gaming. Maybe you could try a fan if you are concerned :)
 

PracticalMac

macrumors 68030
Jan 22, 2009
2,857
5,242
Houston, TX
After about an hour of playing Team Fortress 2 my iMac is running noticeably hotter. Will it heat up to system-damaging temperatures or will it be okay?

I'd rather not kill my iMac prematurely (Like I assume happened to my 2008 model, whose Logic Board died while I was playing TF2) if I can avoid it.

Yes, higher temp for prolonged time will dry out the Thermal Paste, reduce heat transfer, and GPU or CPU will burn up.

BUT manually increasing the fan speed and putting an external fan on iMac will go a LONG way to help it.
 
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Washac

macrumors 68030
Jul 2, 2006
2,520
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What would safe prolonged working temps be for any Mac, or would this vary ?

Also are third party fan control programs safe to use, I have used some in the
past but never felt comfortable with them.
 

Dr. Freeman

macrumors member
May 1, 2012
37
10
iMacs are just as prone to overheating as laptops and as such I wouldn't recommend gaming on them but if you are going to, make sure to replace both CPU and GPU thermal compounds regularly to avoid overheating.
Manually regulating your fans or underclocking your CPU aren't real solutions.
 

hobowankenobi

macrumors 68020
Aug 27, 2015
2,078
883
on the land line mr. smith.
iMacs are just as prone to overheating as laptops and as such I wouldn't recommend gaming on them but if you are going to, make sure to replace both CPU and GPU thermal compounds regularly to avoid overheating.
Manually regulating your fans or underclocking your CPU aren't real solutions.

Although I agree that iMacs don't qualify as legit game hardware....The do however have much bigger fans and heatsinks than laptops.

MacsFanControl does not only manually regulate fans.

Yes, you can set fans to whatever you want manually, but what makes it a reasonable solution for anybody doing any heavy lifting with any all-in-one mac is the ability to see all the temps from all the sensors, to see what is specifically getting hot, and set temp range for components and or/zones so the fans will ramp up automatically to keep everything at an acceptable temp.

It actually works surprisingly well. It is clear that Apple sets fan speeds/ramp temps too conservatively (likely to keep fan noise at a minimum). The fans ramp up to speed to late, and too slowly, and don't maintain a constant medium speed under heavy, constant load. A good tool like MacsFanControl (there are others too) lets a savvy user mitigate this, and use their machine without cooking itself.

Have used it on many machines. It works well, not unlike a well built gaming rig with fans ramping up early, and staying at the right speed for the heat load (once the user dials it in).

It's too bad Apple does not set fan ramp temps a bit lower, or gave us some control. If they did, there would be no need of third party fixes.
 

MandiMac

macrumors 65816
Feb 25, 2012
1,431
882
After about an hour of playing Team Fortress 2 my iMac is running noticeably hotter. Will it heat up to system-damaging temperatures or will it be okay?

I'd rather not kill my iMac prematurely (Like I assume happened to my 2008 model, whose Logic Board died while I was playing TF2) if I can avoid it.

What are you meaning with "it runs noticeably hotter"? Do you feel the warmth on the back side? If so, that's okay - that's where the current iMacs exhaust their hot air (over the aluminium body).

If you're speaking about the internal temperatures (you're awfully vague here), then the others are right. But first, before you get into tinkering around with thermal paste and whatnot, make sure your FPS are limited to 60 (enable vertical synchronisation or short VSync in the settings). If you GPU was the bottleneck before at 100+ fps, this will now stop. Works for every game that isn't so hardware intensive :)
 

neoelectronaut

Cancelled
Original poster
Dec 3, 2003
3,417
2,093
I guess I'm just gonna hold off on gaming on my iMac. No need to kill it any sooner than necessary.
 

PracticalMac

macrumors 68030
Jan 22, 2009
2,857
5,242
Houston, TX
iMacs are just as prone to overheating as laptops and as such I wouldn't recommend gaming on them but if you are going to, make sure to replace both CPU and GPU thermal compounds regularly to avoid overheating.
Manually regulating your fans or underclocking your CPU aren't real solutions.

How many are capable of doing that?
current iMac's are not as easy access than older ones.

I guess I'm just gonna hold off on gaming on my iMac. No need to kill it any sooner than necessary.

Go ahead and game. Watching video at full screen will do about the same amount of heat load.
Just bump the fan speed a up a bit, and at least insure excellent airflow, or a small fan to help circulation.

This may be enough
http://adventureoutfitter.com/brand...ed-desk-fan/?gclid=CP662eji5M0CFY-DaQodGQEF5A

Or go with AC fan
http://www.lampsplus.com/products/d...d=DFGPDR2814&gclid=CPfZsp_j5M0CFQiUaQoddEUIKQ
 
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