CPU temperature

Questions and Answers : Macintosh : CPU temperature
Message board moderation

To post messages, you must log in.

AuthorMessage
Profile Guy LOEBL

Send message
Joined: 29 Mar 00
Posts: 2
Credit: 3,592,586
RAC: 13
France
Message 1765217 - Posted: 15 Feb 2016, 18:28:18 UTC

Hi,

I'm running BOINC on a 21,5' iMac, 2,7 GHz Intel Core i5 Processor, 16 Go RAM.
CPU Core temperatures are PERMANENTLY around 85°C, even with calculation settings down to 20%

After quitting BOINC, the temperatures fall down to 62°C within 1 minute, 50°C within 2 minutes. Average temperatures by "normal" use (i.e. BOINC is down) are around 35°C. They climb back to 70°C within 6 minutes after BOINC relaunch.

Macs Fan Control drops those temperatures down to 75°C, wich is still quite high, isn'it?

What's cooking ? Is it safe to keep the app running with such temperatures? What are the right settings (if any) to avoid such high temperatures?

Thanks for help.
ID: 1765217 · Report as offensive
Profile Jord
Volunteer tester
Avatar

Send message
Joined: 9 Jun 99
Posts: 15184
Credit: 4,362,181
RAC: 3
Netherlands
Message 1765277 - Posted: 15 Feb 2016, 22:06:04 UTC - in response to Message 1765217.  

What are the right settings (if any) to avoid such high temperatures?

The only way to overcome high temperatures is better -after market- cooling. And then preferably water cooling. Not all PC/Mac cases are capable of fitting after market fans or water cooling.

Is it normal for Seti to run those temperatures? Well, yes it is. You're doing intense calculations on your computer, on the CPU, so that will heat up. When the computer isn't running BOINC, it's idle, it's not using the CPU that much.

So when in high use you'll see heat up.
A good idea is to add filters to the PC case, on all openings, to keep hair and dust out. It's also a good idea to clean out the inside of the computer at least once a year, if you're in a dusty environment, make that two or more.

My i5-2500K reached low 80 centigrade with the 'normal' after market CPU cooler, I then changed to a Cooler Master Hyper Evo which took temps down to around 65 centigrade. Since about last summer, I changed over to a Cooler Master Seidon V2 water cooling setup, and now temps don't come above 55 centigrade. I also changed to a new case, with four 120mm fans and filters all around. They're doing a good job of keeping the cat hair out. :)
ID: 1765277 · Report as offensive
Profile Zalster Special Project $250 donor
Volunteer tester
Avatar

Send message
Joined: 27 May 99
Posts: 5517
Credit: 528,817,460
RAC: 242
United States
Message 1765325 - Posted: 16 Feb 2016, 1:40:38 UTC

Since the iMac tend to be a solid shell machine, he's going to have a hard time cooling that machine down.

I'd probably suggest cutting down the number of core he's using in his preferences so that it read

Use at most 50%.

Most macs have that issue as they don't really consider cooling when they build their computers
ID: 1765325 · Report as offensive

Questions and Answers : Macintosh : CPU temperature


 
©2024 University of California
 
SETI@home and Astropulse are funded by grants from the National Science Foundation, NASA, and donations from SETI@home volunteers. AstroPulse is funded in part by the NSF through grant AST-0307956.