Yeah, that was what I sort of gathered too. Bear in mind the fact that I do
not remember what the default low and high threshhold settings are. The forum
I saw did not seem to reveal those. Here's what my playing around with the app
seemed to reveal.
1. The lower you set the low threshhold, the more likely your fans are to push
harder to keep your GPU cooler. That's because the lower threshhold sets the
trigger temperature at which the fans begin to come out of their base RPM
settings. The trade off is that if you set the low threshhold at 100%, the
fans are more likely to stay at or else very close to the base RPM settings.
That's because at the low threshhold settings, the fans are triggered to come
out of their base RPM's becaus that threshhold setting will most always
override the base RPM settings.
2. The high threshhold setting is the setting at which the fans are triggered
in to their maximum number of possible RPM settings. This is the setting at
which the temperature of the GPU is judged to be hot enough to cause this
trigger point to occur. If this high threshhold is set all the way down to 0%
(158DegreesF) the fans will trigger to their maximum RPM settings every single
time you run an app or a process which pulls on the GPU. If, for example, you
cause your GPU to attain a temperature of 159DegreesF, and your high level
threshhold is set to 0% on the slider, (158DegreesF) the fans will be caused to
assume their maximum number of RPM's very rapidly.
In order to determin the best and most sensable settings for your fans
if using fan control, try the following method:
1. Launch Fan control.
2. Launch the app which you know pulls hardest on your GPU.
3. Within that app, begin the process which you know causes the hardest pull
on your GPU.
4. Now, command tap to the Fan control window and carefully monitor the
temperature progress bar which can be found next to the RPM bars of each of
your fans. Note the highest temperature settings for each fan bar; or, if your
Mac has only one fan, monitor that temperature bar and do so very closely.
Make note of the highest temperature attained.
5. Now, do the same for the normal stand by conditions you have when you're
just letting your Mac sit there or doing some light task which does not pull
hard on the GPU.
6. Now, armed with that data, Set your low threshhold to the percentage which
best matches that stand by temperature.
7. Now, taking your high temperature data you aquired earlier, set your high
threshhold to the point of percentage which best matches it.
HTH.
Sincerely,
The Constantly Barefooted Ray!!!
Now a very proud and happy Mac user!!!
Skype name:
barefootedray
Facebook:
facebook.com/ray.foretjr.1
On May 24, 2011, at 6:47 PM, CJ Daniel wrote:
> Ray,
>
> Thanks for sharing those settings. In all these replies, I've sensed that
> some folks think their fans are only coming on when the machine is hot.
> Based on my research, my machine & a lot of posts on the subject elsewhere on
> the net, I'm pretty sure that what their perceiving as the fan coming on is
> actually the fan in High Threshold Mode @ really high RPM's. When in fact,
> the sound probably associated with the laptop's general operations is the fan
> in normal mode.
>
>
> CJ
> On May 24, 2011, at 4:25 PM, Ray Foret Jr wrote:
>
>> Yep. Let me tell yuh, when you look at the teps your GPU is running at,
>> it's mighty frightening. My lwo threshhold is set to 140Degrees f, and
>> that's the 100% setting on the slider. My high threshhold is set to 60%
>> which is 180DegreesF. The default base RPM setting is 2000, according to a
>> forum I looked at.
>>
>>
>> Sincerely,
>> The Constantly Barefooted Ray!!!
>>
>> Now a very proud and happy Mac user!!!
>>
>> Skype name:
>> barefootedray
>>
>> Facebook:
>> facebook.com/ray.foretjr.1
>>
>>
>>
>> On May 24, 2011, at 6:18 PM, Kimberly thurman wrote:
>>
>>> C.J., thanks for this. I will give it a look. :)
>>> On May 23, 2011, at 10:50 PM, CJ Daniel wrote:
>>>
>>>> Kimberly,
>>>>
>>>> Since that post, I've figured out some of the answers. First,
>>>> SMCFanControler doesn't work with VoiceOver. But, FanControler version
>>>> 1.2 does. I'd tried it earlier & couldn't figure where it disappeared
>>>> too, after the install. I went back & did some more checking. Well, long
>>>> story short, after it's installed it appears, as a button, in the system's
>>>> preferences.
>>>>
>>>> You simply click it & then you can set the base RPM for your fans, the low
>>>> range of temp @ which the fans cut in & the high range @ which they go in
>>>> to hyper drive. It's working flawlessly & my machine is already cooler.
>>>> I shudder to think @ what temp it has been running.
>>>>
>>>> Apparently, judging from all the posts that I found on the subject. it's
>>>> a pretty common problem. I'm going to do some more research & try running
>>>> my Mac on the AC power with out the battery installed. If anyone else has
>>>> any other thoughts, then please join in.
>>>>
>>>> CJ
>>>>
>>>>
>>>> On May 23, 2011, at 7:33 PM, Kimberly thurman wrote:
>>>>
>>>>> My Macbook Pro only gets hot when I run Windows in VMware Fusion while I
>>>>> am also charging it. Once it gets so hot, speech does tend to stutter.
>>>>> I have 8 gigs of ram and my unit is a late 2009 Macbook Pro 13 inch. If
>>>>> I just run OSX, my MPB stays as cool as can be.
>>>>> On May 23, 2011, at 9:47 PM, CJ Daniel wrote:
>>>>>
>>>>>> Hello All,
>>>>>>
>>>>>> My Macbook III Pro gets hot. I'm talk'n hot! I mean it's Saturday
>>>>>> night in Chicago in the Roaring 20's hot.
>>>>>>
>>>>>> When it happens, the machine in general & VO in particular just don't
>>>>>> function so well. So, I found a program called SMCFanControler.
>>>>>> Unfortunately, when I try to run the application, VO just tells me that
>>>>>> SMCFanControler doesn't have any windows. Anyone else dealing with a
>>>>>> hot Mac, a nonfunctioning fan controller problem? Inquiring minds &
>>>>>> burning hot pants want to know!
>>>>>>
>>>>>> Thanks for any advice,
>>>>>>
>>>>>> CJ
>>>>>>
>>>>>> P.S. Does anyone smell something burning?
>>>>>>
>>>>>>
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