MacBook Pro 2011 Core i7 Quad Core 2.2 GHz freezes when running hot!

I just received my Core i7 2.2 GHz Quad Core 15 inch laptop today. I was eager to put it through its paces. I have been trying to compile/install gcc and watch some HD youtube clips at the same time. As it turns out that's a very bad combo for this laptop. Compiling gcc maxes out all 4 cores and then you add some graphics usage (especially on an external monitor, which kicks in the AMD 6750M chip), the computer overheats. When the CPU Temperature Diode measurement reaches 92 deg C, the computer crashes, every time. I have crashed my new laptop 6 times already this evening, all due to this issue. I kept an eye on my Kill a Watt meter and it pegs near 85 W (battery fully charged). I think a firmwire update to the fan control unit is in definitely needed. The fan is obviously not running aggressively enough. When you have a 45W CPU plus a 30W GPU, plus 13 W of just turning the machine on, then add in WiFi and HDD, you got one hot system. Intel lists a Tjunc of 100 deg C as their temperature limit. Apple needs to figure out either how to gracefully pause while the CPU hit that limits (i.e. not crashing the whole system), or keep their fans running more aggressively when the CPU + GPU activities picks up in a hungry.

I just did some more testing. The bottom line is not that the fans are unable to keep the computer cool, they can, it's just that they don't come to their maximum speed fast enough. Currently I'm encoding a 1080p video clip using HandBrake, watching another 1080p on YouTube, doing a WiFi transfer between two laptops, and having Google Earth spinning the globe in the background. All the CPU cores/threads are maxed out. I'm doing all this with an external monitor attached which means the AMD graphics chip is running too. With the both fans running max at 6200 rpm, the CPU diode temperature according to smcFanControl (and Temperature Monitor) has settle at 88-89 deg C, 3 degrees below the crash point. So the moral of the story is that if you know you are going to go from zero to 100 in CPU usage in no time, turn on smcFanControl and max out your fans first! This way, you won't overheat and crash. This might seem a bit too hands on for us regular users but at least it seems to works.

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Message was edited by: hb8788
Message was edited by: hb8788

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david.moody wrote:
I Should also say that today numerous resets have not solved the problem.
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http://support.apple.com/kb/HT3964
http://support.apple.com/kb/ht1379
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BUMP
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MacBook Pro 2011 Core i7 Quad Core 2.2 GHz freezes when running hot!

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