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Chenrezig
Caldari School of Applied Knowledge
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Posted - 2009.03.12 22:03:00 -
[1]
So exactly how hot can my components get before they are damaged?
My GPU reaches 70deg C pretty quickly, and GPU Heatsink somewhere between 60deg and 70deg C. Harddrive is reaching about 55deg. This has been on relatively short spurts of play.
My question is: What is the max safe operating temperature for the different components?
This is a new iMac 24" 3.06Ghz '09 with a Nvidia GT130 graphics card, stock model.
Thanks!
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Drake Draconis
Minmatar Shadow Cadre Worlds End Consortium
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Posted - 2009.03.12 22:13:00 -
[2]
Edited by: Drake Draconis on 12/03/2009 22:15:02 Start worrying at 75C
Otherwise your ok... just don't push it.
I would suggest getting the SMC Fan Controller and see if tweaking your fan RPM's helps.
PS: Keep in mind that I said start worrying... not panic and go wacko. Your CPU core temp should never be over 80C. GPU's are a little bit different... but then again... again.. SMC Fan Controller. Crank im up and keep that temp below 70C if at all possible.
Trying out a cooling pad for my MBP... seems to be doing the job. Aluminum.. great metal... nasty when it retains heat. =============== CEO of Clan Shadow Cadre www.shadowcadre.com ===============
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Nickel Deuce
VentureCorp Imperial Republic Of the North
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Posted - 2009.03.13 01:57:00 -
[3]
With my MBP unibody 15" the default fan controller will keep the CPU around 80˚ with one client, even though it can get down to 65˚ if run at higher settings. So it can't be that bad, you would hope.
With two clients, I can get the fan to run at a constant 5k rpm and it's still around 80˚.. hopefully i don't have a funny shaped laptop in a year. |
Drake Draconis
Minmatar Shadow Cadre Worlds End Consortium
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Posted - 2009.03.13 03:51:00 -
[4]
Just because it can run at that temp doesn't mean it will continue to do so for the first 3 years of use.
I guarantee you that you will burn that puppy out way sooner than you planned.
Prolong the life of your mac and play it safe. Keep it cool.... or you'll end up leaching years of life off of it!
Trust me... you do not want to run your computer at extended periods of time at high temps... that is really foolish. |
Ami Nia
Caldari
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Posted - 2009.03.13 06:06:00 -
[5]
Edited by: Ami Nia on 13/03/2009 06:20:07 There's a difference in the way Intel specifies the temperature limits for desktop processors (they use the temperature of the case of the processor) and for the mobile processors (they use the temperature of the cores themself).
Despite what many people think, under many circumstances the core temperatures are below the case temperature. But as the temperatures rise, the opposite becomes true and the cores themself are hotter.
For most older mobile (Centrino) processors the intel limit is 100ŚC. Some of the newer processors have a limit of 105ŚC. As these are mobile processors (like the ones Apple generally uses in the iMacs) the limits refer to the core temperatures.
Desktop processors have the limit defined at the case and they are generally a little lower.
However you are talking of GPU temperatures. The GT 130 specification lists the limit at 105ŚC. And since the only sensor of the chip is the diode we can assume that it refers to that sensor temperature.
A problem with the various fan-control stuff is that they measure the CPU diode and control the fan speeds from that. They ignore all the other temperatures (my Mac Book Pro has a total of 13 temperature sensor) including the GPU diode and the CPU core temperatures.
Try to keep the tempertures as low as possible. In any case I would not be too worried for any temperature that is below 80ŚC, no matter what chip or sensor it is related to. And for chip diodes anything below 90ŚC is surely far from the limits. If you can stay lower, better yet. And remember: the worst you can do is having a very variable temperature. I'd rather have them stay at 85ŚC steady, than having them continuously go from 50ŚC to 70ŚC and back. That's why the fans are micromanaged and use a variable speed instead of using a fixed speed and activate with an hysteresis.
Finally, for those that use Mac Books and Mac Book Pros, do NOT base your choices on what you feel. If you were to touch a surface at 90ŚC it would feel extremelly hot. Judge by solid data from a sensor, not by what you think is hot according to your touch.
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Drake Draconis
Minmatar Shadow Cadre Worlds End Consortium
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Posted - 2009.03.13 14:37:00 -
[6]
For once I agree completely with Ami.
Keep in mind that Macbooks/Macbook Pros are very tightly and small spaces.
Reading the service manuals while I study up on my cert exams for Apple care revealed a great deal about the layout of the internals of the MBP 15".
While I'm not allowed to say anything other than whats on public knowledge areas.. I can say that there's not a lot of room for heat to get too.
don't push your luck... you will regret it. =============== CEO of Clan Shadow Cadre www.shadowcadre.com ===============
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eesn
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Posted - 2009.03.13 16:28:00 -
[7]
CPU is perfectly safe up to 80C. whether that's a comfortable temperature for you and your laptop is an entirely different subject........
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Drake Draconis
Minmatar Shadow Cadre Worlds End Consortium
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Posted - 2009.03.13 16:57:00 -
[8]
Edited by: Drake Draconis on 13/03/2009 17:01:08
Originally by: eesn CPU is perfectly safe up to 80C. whether that's a comfortable temperature for you and your laptop is an entirely different subject........
Ignore this.
Don't let it go over 75C.
Keep it simple.. stop confusing everyone.
If it does... find a way to keep it cooler. =============== CEO of Clan Shadow Cadre www.shadowcadre.com ===============
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Ami Nia
Caldari
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Posted - 2009.03.13 19:46:00 -
[9]
Edited by: Ami Nia on 13/03/2009 19:48:42 Actually I think you are both correct. It is best to keep the temperature as low as you can. But it is not something to become crazy about if it gets to 80. Actually if the CPU is a Centrino/Portable CPU (and the same goes for GPUs) they are very much safe at 95ŚC diode temperature (and even more than that for GPUs).
The important thing, however, is that you use the fans to control the temperature and do NOT try to control it by doing things like pausing the program (not a possibility for EvE, but it can be done with some rendering/scientific computation programs) or by exiting the program to "let the computer cool up a little bit". I have seen people quitting games for that reason when they had to go for a bio or to heat a tea/coffee. If you are going to pause for a few minutes, do NOT take the chance to "let it cool up".
It is true that the expected lifespan of the hardware will be shorter if it works constantly at 85ŚC than it would be if it worked at 60ŚC. But you are going to stress it MUCH MORE by "letting it cool" from 80 down to 50 for a few minutes and then back up to duty. If all you can do with the fans is having it at 85ŚC while on full duty, then that's what you can do. And you'd better leave it at 85ŚC constantly then up and down.
Remember: the most "damage" is done when the chip GOES to a high temperature (AND when it cools back to a lower one). Not when it IS at a high temperature.
Technically: there's nearly nothing in there that "cooks" (suffers temperature). The real damage is in the physical movement and resulting attrition caused by thermal dilation. What a hight, but constant, temperature does is affecting the electrical properties of the internal junctions. But that is not something that changes too much over time: you'll see it very very soon if the chip is suffering from that (may happen with GPUs much more than it does with CPUs).
Try not to get it hot. But once it's hot ... keep it hot.
Finally: avoid dusty areas and keep the ventilation apertures clean and free. If your aluminium chassis feels hot, even VERY hot, just do not touch it. It's hot because that's how your processor stays cool. Let it dissipate: it's a large metal surface, ideal for getting rid of heat (it's doing that, that's why it's hot). Macs are an incredible engineering piece of Art (capital A for Art. And yes: if someone ever proved engineering can be an Art, that's Apple). It's pretty tight in there. And air flow (as well as heat flow, if you can understand the difference, for portables) has been carefully (very carefully) studied. This is also true of Mac Pros (and it was true of G5s too) except there things are a bit less tight. If you ever have the chance to be in a lab where they can show you the airflow in a G5/Mac Pro and in a common PC using "dyed air" (not sure it's the correct term in english), ask them to. It's fascinating and you'll understand WHY many of us cannot stand "ordinary" PCs any more (and why Apples are cheaper than equivalent PCs, as there are very few equivalent PCs).
Military experts call it a Templar, a fighter drone used by Amarr carriers. -- Sheriff Jones
apochribba -- Aurora Morgan
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Jenchin
Minmatar Sirrius Cybernetics
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Posted - 2009.03.16 17:32:00 -
[10]
Thank you Ami.
I was getting concerned about the temperature of my Mac when playing EVE, but after some digging and careful thought everything seems to be fine.
Your posts helped verify what I had been thinking about for a bit now.
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