When do the fans start on a MBP 17"?...

[slick316]

I am stressing the CPU right now, running two instances of yes > /dev/null in terminal. CoreDuoTemp is showing the temp at 79 Celcius, 100% CPU Usage. Its been like this for 5 minutes, but the fans haven't turned on (or atleast I can't hear them).
Is this normal? Its not like the laptop is unusually hot or anything, so for that reason I don't really care, I am just wondering however.

 

[idkfa]

I don't own a MBP, but should your computer not turn off if it reaches unacceptable heat levels. Before the new Intel Macs, I would never check the temperature because it would drive you insane, but now... I am not sure. How long have you been running it like this?

Mac Book Pro Temperature Gauge: Place an egg on the left palmrest, and a piece of bacon on the right. If the bacon cooks before the egg, you may have a problem. 😛

 

[Temujin]

I am stressing the CPU right now, running two instances of yes > /dev/null in terminal. CoreDuoTemp is showing the temp at 79 Celcius, 100% CPU Usage. Its been like this for 5 minutes, but the fans haven't turned on (or atleast I can't hear them).
Is this normal? Its not like the laptop is unusually hot or anything, so for that reason I don't really care, I am just wondering however.

Yep normal, if the CPU reaches 125 Celcius your MBP will shut down automatically. So no worries, it's just hot 🙂

Edit: Check this out http://www.intelmactemp.com/list?v_...p_1=&v_hddtemp_2=&v_whine=&v_moo=&v_postedby=

 

[slick316]

they turned on, after 7 minutes. Never went over 81 Celcius. I heard the fans, and temp started to drop, down to the low 70's. Also noticed the CPU speed dropped, from 2167mhz to like 1667mhz.

 

[remowilliams]

Mine come on at 80c They are very very quiet (didn't even hear them) initially, and with continued load get a bit louder.

 

[BiikeMike]

What does "yes > /dev/null in terminal" do?

 

[Temujin]

What does "yes > /dev/null in terminal" do?

Makes your CPU run at 100%. If you have two cores you have to open two terminal windows and type it in both console windows. Then both cores will run at 100%.