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smcfancontrol

Message #1 - Posted 2007/02/18 - vix

i downloaded this app. just wanted to know if it is safe to have the fans running at about 4000 rpm all the time?

Message #2 - Posted 2007/02/18 - Dr.zara

"Mike Rosenberg" <mikePOST@TOGROUPmacconsult.com> wrote in message news:1htqdep.yfplqh1yuvwzyN%mikePOST@TOGROUPmacconsult.com...

Dr.zara wrote:

The cooler the CPU, the better and faster it will work.

And I suppose you can cite a source to support this statement.

I don't have to cite shit. It's a well known fact to anyone with electronic experience. Why do you think all computers have fans??

Message #3 - Posted 2007/02/19 - John Byrns

Previously, Dr.zara wrote:

"Mike Rosenberg" <mikePOST@TOGROUPmacconsult.com> wrote in message news:1htqdep.yfplqh1yuvwzyN%mikePOST@TOGROUPmacconsult.com...

Dr.zara wrote:

The cooler the CPU, the better and faster it will work.

And I suppose you can cite a source to support this statement.

I don't have to cite shit. It's a well known fact to anyone with electronic experience. Why do you think all computers have fans??

So they don't melt?

Regards,

John Byrns

Surf my web pages at, http://fmamradios.com/

Message #4 - Posted 2007/02/18 - Mike Rosenberg

Dr.zara wrote:

I don't have to cite shit. It's a well known fact to anyone with electronic experience. Why do you think all computers have fans??

First, they don't all have fans. Second, there's a big difference between keeping the temperature below a limit and your claim that the cooler the better.

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Message #5 - Posted 2007/02/18 - Mike Rosenberg

Dr.zara wrote:

It's a well known fact to anyone with electronic experience.

If it's a well known fact, you should no trouble at all in citing a source, should you?

<http://designsbymike.biz/macconsultshop.shtml> Mac-themed T-shirts <http://designsbymike.biz/musings.shtml> Mostly muckraking T-shirts <http://designsbymike.biz/prius.shtml> Prius shirts & bumper stickers <http://cafepress.com/comedancing> Ballroom dance-themed shirts & gift

Message #6 - Posted 2007/02/18 - Barry Margolin

Previously, Mike Rosenberg wrote:

Dr.zara wrote:

I don't have to cite shit. It's a well known fact to anyone with electronic experience. Why do you think all computers have fans??

First, they don't all have fans. Second, there's a big difference between keeping the temperature below a limit and your claim that the cooler the better.

Since the conditions necessary to encounter the "too cool" limit are pretty rare, the difference is rarely relevant. Are there any computers that even try to detect this and generate extra heat to counteract it, analogous to the use of fans and other cooling mechanisms to combat overheating?

Barry Margolin, barmar@alum.mit.edu
Arlington, MA
*** PLEASE post questions in newsgroups, not directly to me *** *** PLEASE don't copy me on replies, I'll read them in the group ***

Message #7 - Posted 2007/02/18 - Mike Rosenberg

Barry Margolin wrote:

Second, there's a big difference between keeping the temperature below a limit and your claim that the cooler the better.

Since the conditions necessary to encounter the "too cool" limit are pretty rare, the difference is rarely relevant.

I think you misunderstood my point. Say a CPU is designed to operate at a maximum of 80 degrees C. Certainly it's necessary to keep the CPU below that point, but his claim was the cooler the CPU, the better and faster it would function. He said nothing of a "too cool" limit at all.

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Message #8 - Posted 2007/02/18 - Tom Harrington

Previously, vix wrote:

On Feb 18, 3:27 pm, Mike Rosenberg wrote:

vix wrote:

i downloaded this app. just wanted to know if it is safe to have the fans running at about 4000 rpm all the time?

I have no idea. Why do you want to do this in the first place?

because the average temp of my macbook is like 60 degrees Celsius. When i increase the rpm of the fan it goes down to between 39-43 degrees celsius

That doesn't really answer the question, though. Running at 60C is not dangerous to you or to the computer, so what are you trying to accomplish here?

Tom "Tom" Harrington
MondoMouse makes your mouse mightier
See http://www.atomicbird.com/mondomouse/

Message #9 - Posted 2007/02/19 - Clever Monkey

Dr.zara wrote:

"Mike Rosenberg" <mikePOST@TOGROUPmacconsult.com> wrote in message news:1htqdep.yfplqh1yuvwzyN%mikePOST@TOGROUPmacconsult.com...

Dr.zara wrote:

The cooler the CPU, the better and faster it will work.

And I suppose you can cite a source to support this statement.

I don't have to cite shit. It's a well known fact to anyone with electronic experience. Why do you think all computers have fans??

I have electronic experience. Fans are used to maintain a specific range of operating temperature.

Pushing electronics to extremes requires extreme cooling, but this is a different case for designs that are well within specifications.

Only if a design was pushed to an edge would one see performance degradation and generally flaky behaviour. It takes power to push bits around, and this is why laptops throttle down to conserve battery. This does not imply, at all, that cooling down a chip running at normal speeds would necessary *increase* to any significant amount, the chip speed.

Extreme cooling lets you hack voltages and bus speeds to increase performance. It has little to do with a properly designed computer running within specifications.

Assuming a MacBook is designed within Intel specifications, the next questions might be:

- Is the operating temperature above the recommended averages? - If so, is it the CPU that is making this heat. There are other things in a laptop that draw Watts.
- If so, what are the sorts of things one could do to correct this incorrect behaviour not seen by other people?

If this is /really/ a problem, we /can/ increase the fans speed, at the cost of higher power use. We can also throttle the CPU down, which will happen automatically under default settings, or can be tweaked by hand via the system prefs.

If the Laptop is still under warranty, then I suggest following up on that, instead of hacking the fan speed. Macs Just Work. The corollary to this is that Macs That Don't Work Can Be Repaired or Replaced. Macs have a very sophisticated power management and environmental system that controls this stuff. Just Let It Work.

My guess:

If (and only if) the internal temperature of this box has spiked over the last few months, then I suspect that this laptop is full of dust and did not have the heatsink seated properly at the factory. As the dust increased the cooling ability of the heatsink to move heat dropped considerable, leading to a spike in case temperature.

The solution is to fix this problem. If it is under warranty, just return it for a proper servicing.

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