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Discussion in 'iMac' started by Saviorrisen, Oct 15, 2012.
I have a late 2007 iMac that runs between 40-47/48. Curious what "normal" is? What is healthy?
That's quite normal. Your CPU and GPU are the two furnaces in your Mac. They will typically have the highest temps. Unless something is very wrong, you never need to think about drive temps.
And the GPU can get quite a bit hotter correct? I think if I am playing a game like Age of Empires 3 or something it gets around 65..
Again, a perfectly acceptable temperature, in Fahrenheit and Celsius.
I have the same iMac (2007 Aluminium iMac) and get temps between 40 and 70 for CPU and GPU.
The Intel processors used in Macs are designed to automatically shut down to prevent damage if they truly overheat. CPU Tjmax = 105C (221F), GPU Tjmax = 100C (212F) on i3, i5, i7 processors. (Source: Intel)
If you're not already using it, iStat Pro (free) or iStat Menus ($16) will give you accurate readings of your temps and fan speeds, among other things.
Unless there is a rare defect in a Mac, most temps are well within the normal operating range, considering the workload being put on it. Websites with Flash content, games and other multimedia apps will put higher demand on the CPU/GPU, generating more heat. This is normal. If you're constantly putting high demands on your system, such as gaming or other multimedia tasks, expect temps to rise and fans to spin up accordingly. It's just your Mac doing its job to maintain temps within the normal range.
It is also quite normal for your Mac to become extremely hot to the touch during intensive operations. The aluminum body transfers heat more effectively than other materials used in computer casings, so you will feel the heat more. This doesn't indicate that it's overheating and will not harm the computer to be hot to the touch.
Your fans are always on when your Mac is on, spinning at a minimum of 2000 rpm (for MBPs) or 1800 rpm (for MBAs, MBs and minis). iMacs have 3 fans with minimum speeds in the 800-1200 range. They will spin faster as needed to keep temps at a safe level.
If your fans are spinning up without increased heat, try resetting the SMC.
(PRAM/NVRAM has nothing to do with these issues, so resetting it will not help.)
The intake and exhaust vents are in the back of the computer near the hinge on all Mac notebooks (except the new MBP with retina display, which has intake vents along the sides at the bottom). The iMac vent is a slot on the back near the top of the computer. Make sure the vents remain unblocked to allow your computer to perform at its best.
Learn about the fans in your Mac
Apple Portables: Operating temperature
For Flash-related issues:
Find your Flash version and make sure it's the latest version available.
Install ClickToFlash (Safari), Flashblock (Firefox) or FlashBlock (Chrome) to control which Flash content plays on websites.
Use the YouTube HTML5 Video Player to watch YouTube videos, when available. (May impact fullscreen viewing. See link for details.)
How hot can it get with it still being okay?
See my last post (first sentence).
Thank you so much for the informative reply!
I do not know the Tmax for the GPU, but if the iMac gets too hot, it just shuts down to prevent any heat damage. It never happened on my iMac in five years and there were several nights when the CPU was calculating highly CPU intensive tasks (200 % CPU usage) for several hours or days.
That mentions the CPU and GPU.. what about the HD?
50 to 60 ° Celsius.
As I said, you rarely if ever need to watch drive temps, as they never get too hot unless something is damaged or defective.
Hard drive operating temperatures are normally between 5 and 55 degrees Celsius. Some operate at up to 60 degrees Celsius. However, a hard drive operating at over 45 degrees Celsius for long periods will have a shorter life span than one operating below 40. A hard drive should really be operating at around 30 to achieve maximum life span. But hey, that's why we have iMac hard drive replacement programs to make up for that little oversight. Having said all that, around 45-50 appears to be "normal" for an iMac.
there have been quite a few studies on safe hdd temps. I remember reading a white paper that tested seagates at 24/7/365
running at 35 to 40c
running at 40 to 45c
running at 45 to 50c
running at 50 to 55c
the 50 to 55c test sample had the lowest fail rate and the 35 to 40c test sample had the highest fail rate. maybe I can find the link I read this on the net more then 18 months ago I found it to be hard to believe.
Would love to read that. As you mentioned, it's hard to make sense of that.
Edit: I believe that I've found it
Very interesting stuff. Let your hard drives bake and be merry.
SEB thanks for finding it.
I know that a lot of moving gear can run near redline better then
understressing it. so maybe this is the case.