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Stayfly2407

macrumors 6502
Original poster
Apr 1, 2011
423
53
VA
Fanless, nice. Quiet, nice.... So how does this thing cool down after running several apps for hours??
 
Fanless, nice. Quiet, nice.... So how does this thing cool down after running several apps for hours??
The point is that it's designed to generate less heat, so even running for several hours, it won't get as hot as other Macs.
 
even when the cpu is at max 2.4 ghz the heat is vents aways through the metal chassis
 
It slows down to like 400mhz.

Kidding I don't know the precise answer but all Intels throttle down as needed. Suffice to say it will never get hot enough to be unsafe, that you can depend on.
 
you are kidding right? :D
it operates between 1100mhz and 2.4
That is hardware can't do below or higher than that
 
you are kidding right? :D
it operates between 1100mhz and 2.4
That is hardware can't do below or higher than that
Intel® Core™ M-5Y51 Processor (4M Cache, up to 2.60 GHz)
Configurable TDP-down Frequency 600 MHz
Configurable TDP-down Frequency is a processor operating mode where the processor behavior and performance is modified by lowering TDP and the processor frequency to fixed points. The Configurable TDP-down Frequency is where the Configurable TDP-down is defined. Frequency is measured in gigahertz (GHz), or billion cycles per second.
 
1.1 ghz turbo boost up to 2.4ghz , not to 2.6 ghz. Tha is the 1.2 CPU
Configurable TDP-down Frequency is the same for both: 600MHz

Intel® Core™ M Processor
Screen Shot 2015-03-10 at 4.47.32 PM.PNG
 
it will underclock to stay below a given TDP

so, yes it can boostclock to 2.whatever but it won't stay there for very long
 
The CPU will throttle and eventually encounter a thermal shutdown. The 101 task for Apple's engineers is to ensure that does not happen.
 
Will be interesting to see what happens in more CPU cycle intensive applications.

On my MBA 11" and Surface Pro 3, both with i5, Lightroom causes the fan to kick in. The performance is quite good though, and the fan keeps the temps optimal to avoid thermal throttling.

If the new MacBook downclocks to 600Mhz under the same circumstances to maintain the low TDP, photo editing could become a terrible experience, if not downright hellish.

Waiting for the first reviews with much anticipation.
 
Tell this to my iPhone 6 which occasionally gets burning hot
Your iPhone doesn't get as hot as Macs can under extreme load, and like Macs, your iPhone will shut down before it exceeds safe operating temps.
 
Your iPhone doesn't get as hot as Macs can under extreme load, and like Macs, your iPhone will shut down before it exceeds safe operating temps.

My point is that I don't believe in a fanless laptop. I rather expect fans to appear in mobile phones some day if they continue to increase their processing power at the current pace.
 
My point is that I don't believe in a fanless laptop. I rather expect fans to appear in mobile phones some day if they continue to increase their processing power at the current pace.
Millions of mobile phones operate without issue for years without needing fans, whether you believe in them or not. As technology advances result in processing power increases over the years, so does thermal efficiency.
 
Millions of mobile phones operate without issue for years without needing fans, whether you believe in them or not. As technology advances result in processing power increases over the years, so does thermal efficiency.

It's a bit of a simplification to suggest they happen at the same rate however, and we are definitely hitting genuine physics problems with thermal efficiency improvements at this point.
 
The core-m in the new MacBook runs on 5w of power, compared to the 15w chips in the MacBook Air. This is more in line with the power consumption of the chip in the iPad.

Fans aren't necessary.
 
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