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One of my cores keeps shutting down?
- Thread starter Mr.Green
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Remember guys, temperature can be represented either in ºC or ºF (or kelvin, I suppose).
Your CPU is running about 20ºF higher than his is, by the way.
Your CPU is running about 20ºF higher than his is, by the way.
What utility are you using to get the temperature and fan speed?
I.e., I figured out how to get the Activity Monitor...
There was a knowledge base article about the MacBook Air shutting a core down to prevent overheating but it's no longer online.
MacBook Air: 3D graphics applications less responsive when CPU has been in heavy use for prolonged period
http://www.google.com/search?client...vy+use+for+prolonged+period&ie=UTF-8&oe=UTF-8
MacBook Air: 3D graphics applications less responsive when CPU has been in heavy use for prolonged period
http://www.google.com/search?client...vy+use+for+prolonged+period&ie=UTF-8&oe=UTF-8
Could be the first major MBA problem?
I must say that 158* is pretty high...call up Apple.
He is using it to encode movies. See ffmpeg/VisualHub
In addition, he has apps open for torrents, music, video(s), and browsing web.
Well, at least he's not trying to play Crysis at the same time. =p
Translation = full CPU usage = heat
Might want to get a laptop cooler...
I am thinking about building one with 120mm quiet fans instead of a store bought that are fairly loud.
Most systems are not suppossed to get above 70c. The reason for the core shutdown is three fold, 1) to reduce heat, 2) to save power when not needed, 3) to save battery life when unplugged.
You should be able to deactivate this "feature" by selecting "maximum" as your processor speed in the energy saver preference pane.
TEG
You should be able to deactivate this "feature" by selecting "maximum" as your processor speed in the energy saver preference pane.
TEG
I know the real memory looked small but there seemed to be ahelluva lot of virtual memory. Could that be swapping in and out causing IO wait or something ???
Nah, just because there is a lot of virtual memory allocated doesn't mean there is a lot of swapping going on. We'd have to see his memory tab to know more.
Yeah, I was just commenting that we need more information to say anything conclusive about that.
Hmm... just discovered that watching streaming 720p episodes of Lost from the ABC site overloads the processor and causes intermittent core shutdown. Annoying because it then gets all choppy and unwatchable.
That's a shame.
That's a shame.
I was primarily encoding video using VisualHub for my iPhone, and downloading something with Transmission. The computer was sitting on a marble table in my hotel room.
On my Macbook Pro, I am able to run the processors at 100% all day long encoding video. The fans would spin up at max and be very noisy, but I could do it if I wanted and the cores have never shut down like this. My first Macbook Pro, the core 1 duo, would sometimes even reach 85-90 degrees C / 185-194 F. My rev 2, Macbook Pro doesn't ever get that hot.
The processor on my Air almost never even reached 100%. I would have expected in the Air, Apple should have tested it and designed it so it could run at 100% without overheating and triggering a CPU shutdown.
I love my Air, but I think this is a mistake. Apple does like to push the thermal envelope all the time and I think they went a bit too far. Hopefully there would be a software fix for this.
On my Macbook Pro, I am able to run the processors at 100% all day long encoding video. The fans would spin up at max and be very noisy, but I could do it if I wanted and the cores have never shut down like this. My first Macbook Pro, the core 1 duo, would sometimes even reach 85-90 degrees C / 185-194 F. My rev 2, Macbook Pro doesn't ever get that hot.
The processor on my Air almost never even reached 100%. I would have expected in the Air, Apple should have tested it and designed it so it could run at 100% without overheating and triggering a CPU shutdown.
I love my Air, but I think this is a mistake. Apple does like to push the thermal envelope all the time and I think they went a bit too far. Hopefully there would be a software fix for this.
Anybody installed Menu Meters on the air so you can see this activity in the menu bar all the time? That would be rather revealing.
Seems like utilizing the processing power of the dual core processor is going to make it a single core anyways.
*cough*Thicker laptop*cough*
Hopefully it won't melt your laptop. Then again Apple changed the thermal tolerances and fan speeds for the G5 in Leopard.Mr.Green said:
*cough*Thicker laptop*cough*