Max speed of my fan

Hello,
I have a question: when i open Minecraft on my Mac Mini 2012 my fans get faster rotation... about 3500rpm so my question is
how long can i playing like that to not kill my mac ?
Please for advise
Mathew

Your welcome.
As for the other problem, I hope that I have hit on it below and over in the original thread over in the Mountain Lion section.
One thing that Apple does well is build very quiet machine's and by default the fan will eventually ramp up without third party fan control utilities. The problem is that, the default settings are way out there at around 90c and then at that point the fan gets kicked up to full speed until things cool off. Like you, many of us here also think that is a really bad way to treat hardware and use some type of third party Fan Control utility.
For example: I have one of the first Intel iMac's, an Early 2006 Core Duo and have used smcFanControl on it from the day it was new. For over 7 years I have ran it's fans from 100 rpm over default in the winter to 500 or 600 rpm over the default in the summer and it has never had a single overheating or hardware issue. It is maxed out at 2GB of RAM and can only run Snow Leopard, but I have kept it around because it is still a very good machine for the grandkids to learn and play games on.
On my Mac Mini running Mountain Lion I also use Fan Control 1.2 and really like it over smcFanControl because I don't have to worry about having different speed sets for different activities or seasons.
Here are my Mac Mini's Fan Control settings.
(sorry I'm old and still use F to know how cold and hot things are)
If you would like to increase the set point that the fan starts ramping up, increase the Lower Threshold slider.
If you would like to have the fan speed ramp up at a slower/flater rate, increase the Upper Threshold slider.

Similar Messages

Often I will leave my office and return to find the fan running at max speed and the computer is unresponsive

I also have a MacPro3,1 (2009) I believe and just started experiencing similar issues as described here.
I have scheduled sleep and start cycles and often I will leave my office and return to find the fan running at max speed and the computer is unresponsive or I find the computer booted in to disk utility mode.
I also often loose ethernet connectivity and have to try renewing DHCP lease several times before it will finally work.
Has anyone found solutions for this. I have looked at the console errors right before shutdown and don't really see anything fishy. Here are the last couple of lines before it looks like it shutdown.
12/4/14 10:08:37.447 PM xpcproxy[5066]: assertion failed: 13F34: xpcproxy + 3438 [D559FC96-E6B1-363A-B850-C7AC9734F210]: 0x2
12/4/14 10:08:58.145 PM mds[38]: (Normal) ImportServer: Ignoring blacklisted Spotlight importer plugin:/Developer/Applications/Xcode.app/Contents/Library/Spotlight/SourceCode. mdimporter uuid:548A3091-3C5D-498A-A329-B532A6C896BB version:1085
12/4/14 10:08:58.193 PM mds[38]: (Normal) ImportServer: Ignoring blacklisted Spotlight importer plugin:/Developer/Applications/Xcode.app/Contents/Library/Spotlight/SourceCode. mdimporter uuid:548A3091-3C5D-498A-A329-B532A6C896BB version:1085
12/4/14 10:08:58.235 PM mds[38]: (Normal) ImportServer: Ignoring blacklisted Spotlight importer plugin:/Developer/Applications/Xcode.app/Contents/Library/Spotlight/SourceCode. mdimporter uuid:548A3091-3C5D-498A-A329-B532A6C896BB version:1085
12/4/14 10:08:58.269 PM mds[38]: (Normal) ImportServer: Ignoring blacklisted Spotlight importer plugin:/Developer/Applications/Xcode.app/Contents/Library/Spotlight/SourceCode. mdimporter uuid:548A3091-3C5D-498A-A329-B532A6C896BB version:1085
12/4/14 10:08:58.301 PM mds[38]: (Normal) ImportServer: Ignoring blacklisted Spotlight importer plugin:/Developer/Applications/Xcode.app/Contents/Library/Spotlight/SourceCode. mdimporter uuid:548A3091-3C5D-498A-A329-B532A6C896BB version:1085
12/4/14 10:08:58.662 PM mds[38]: (Normal) ImportServer: Ignoring blacklisted Spotlight importer plugin:/Developer/Applications/Xcode.app/Contents/Library/Spotlight/SourceCode. mdimporter uuid:548A3091-3C5D-498A-A329-B532A6C896BB version:1085
12/4/14 10:09:57.998 PM mds[38]: (Normal) ImportServer: Ignoring blacklisted Spotlight importer plugin:/Developer/Applications/Xcode.app/Contents/Library/Spotlight/SourceCode. mdimporter uuid:548A3091-3C5D-498A-A329-B532A6C896BB version:1085
12/4/14 10:09:58.142 PM mds[38]: (Normal) ImportServer: Ignoring blacklisted Spotlight importer plugin:/Developer/Applications/Xcode.app/Contents/Library/Spotlight/SourceCode. mdimporter uuid:548A3091-3C5D-498A-A329-B532A6C896BB version:1085
12/4/14 10:10:30.000 PM kernel[0]: PM notification timeout (pid 1514, Messages)
12/4/14 10:10:31.129 PM mDNSResponder[39]: DHCPWakeTime: SCDynamicStoreCopyDHCPInfo index 0 failed CFDateRef start 0000000000000000 CFDataRef lease 0000000000000000 CFDataGetLength(lease) 0
Any help would be greatly appreciated.
<Re-Titled By Host>

Mac Pro early 2009 is Mac Pro4,1, anyway, I think you need to boot into recovery mode, launch Disk Utility, then select startup volume and run repair disk.
Xcode is the latest one, by the way?

Fan stuck on max speed

Hi there I have a HP Envy 700-230ea and for some reason the system fan seems to be stuck on max speed I have tried many options to reduce it but none seem to work. I set it to power saver and left it to be idle but it continues to run on full. I have checked bios but there doesnt seem to be any settings to control the speed and have also installed speedfan but yet again doesnt make the slightest bit of difference for first week the computer ran really quiet but now the fan is very loud even when its not under pressure.
Please help
Thanks in advance
This question was solved.
View Solution.

Hello again DavichGee,
I am sorry to hear you are still having the issue. I would like you to try resetting the BIOS on your computer. You can do this by restarting the computer and tapping F10. When you get into the BIOS click on File and click on Apply Defaults and Exit.
If this does not resolve your issue I still think it would be best if you contact HP Technical Support for repair options.
I would like to thank you for posting on the HP Forums. Have a great day!
Please click the "Thumbs Up" on the bottom right of this post to say thank you if you appreciate the support I provide!
Also be sure to mark my post as “Accept as Solution" if you feel my post solved your issue, it will help others who face the same challenge find the same solution.
Dunidar
I work on behalf of HP
Find out a bit more about me by checking out my profile!
"Customers don’t expect you to be perfect. They do expect you to fix things when they go wrong." ~ Donald Porter

HP Compaq 615 | no pwm-capable sensor modules | fans at max speed

Hi,
I have installed archlinux on an old HP Compaq 615 laptop, everything is working fine, but I have problems with the fan speed. After installing lm_sensors, configuring the sensors with sensors_detect resulted in this:
Now follows a summary of the probes I have just done.
Just press ENTER to continue:
Driver `k10temp' (autoloaded):
* Chip `AMD Family 11h thermal sensors' (confidence: 9)
Driver `to-be-written':
* Bus `SMBus PIIX4 adapter at 0b00'
Busdriver `i2c_piix4', I2C address 0x4c
Chip `SMSC EMC1402' (confidence: 6)
Driver `adm1021':
* Bus `SMBus PIIX4 adapter at 0b00'
Busdriver `i2c_piix4', I2C address 0x4e
Chip `Maxim MAX1617' (confidence: 3)
Note: there is no driver for SMSC EMC1402 yet.
Check http://www.lm-sensors.org/wiki/Devices for updates.
Running pwmconfig leads to the error:
/usr/bin/pwmconfig: There are no pwm-capable sensor modules installed
If I execute sensors, I get this:
k10temp-pci-00c3
Adapter: PCI adapter
temp1: +51.4°C (high = +70.0°C)
(crit = +100.0°C, hyst = +95.0°C)
max1617-i2c-5-4e
Adapter: SMBus PIIX4 adapter at 0b00
temp1: +0.0°C (low = +0.0°C, high = +0.0°C)
temp2: +51.0°C (low = +45.0°C, high = +60.0°C)
The fans are blowing at max speed, and the sensors are not providing information on fanspeed. I have found multiple threads on this topic, and tried the following:
Turning OFF/ON the option "Fan always on while on AC power" .
Passing the parameter "acpi_enforce_resources=lax" to the kernel via GRUB.
That didn't help. If I list the modules and search for k10
lsmod | grep k10
k10temp 12588 0
hwmon 12930 3 k10temp,adm1021,radeon
It seems that k10temp is loaded and used to show the sensor temperatures. On the fancontrol page of the ArchWiki, there were tips on increasing fan_div, but the problem was for me to find the chipset name.
The reported chipset `adm-1021` is not available in `/etc/sensors3.conf`, only `adm-1025`. Also, what's up with
Driver `to-be-written':
result of `sensors-detect`? Is there any way to stop the fans from blowing at full speed for HP Compaq 615?

I just tried turning ACPI off, by passing `acpi=off` kernel parameter in the /etc/defaults/grub:
GRUB_DEFAULT=0
GRUB_TIMEOUT=5
GRUB_DISTRIBUTOR="Arch"
GRUB_CMDLINE_LINUX_DEFAULT="acpi=off"
The fans were dead afterwards, but as the warning on the Acpi Modules Wiki Site states
2. "Easy" Put acpi=off in the kernel line in your bootloader's configuration file, but that will kill all ACPI functionality like battery charging and power saving.
killing all ACPI functionality for HP Compaq has left me without the synaptics touchpad and the keyboard. I found on the Ubuntu Community Wiki - Boot Options that `noacpi` shuold be equivalent to `acpi=off`. That sounded weird, so I checked The Kernel Documentation:
acpi= [HW,ACPI,X86]
Advanced Configuration and Power Interface
Format: { force | off | strict | noirq | rsdt }
force -- enable ACPI if default was off
off -- disable ACPI if default was on
noirq -- do not use ACPI for IRQ routing
strict -- Be less tolerant of platforms that are not
strictly ACPI specification compliant.
rsdt -- prefer RSDT over (default) XSDT
copy_dsdt -- copy DSDT to memory
See also Documentation/power/runtime_pm.txt, pci=noacpi
noacpi [X86] Do not use ACPI for IRQ routing
or for PCI scanning.
Seeing that the options are in fact different, I tried the `noacpi` thinking that "disabling the use of ACPI for IRQ routing or for PCI scanning" ( I have no clue what that means ) might just do the trick. So back to `/etc/default/grub`
GRUB_CMDLINE_LINUX_DEFAULT="noacpi"
I updated the grub.cfg with
grub-mkconfig -o /boot/grub/grub.cfg
and removed: acpid, Cpu Frequency Scaling, and I cleaned up `mkinitcpio.conf` of everything :
# vim:set ft=sh
# MODULES
# The following modules are loaded before any boot hooks are
# run. Advanced users may wish to specify all system modules
# in this array. For instance:
# MODULES="piix ide_disk reiserfs"
MODULES=""
# BINARIES
# This setting includes any additional binaries a given user may
# wish into the CPIO image. This is run last, so it may be used to
# override the actual binaries included by a given hook
# BINARIES are dependency parsed, so you may safely ignore libraries
BINARIES=""
# FILES
# This setting is similar to BINARIES above, however, files are added
# as-is and are not parsed in any way. This is useful for config files.
FILES=""
# HOOKS
# This is the most important setting in this file. The HOOKS control the
# modules and scripts added to the image, and what happens at boot time.
# Order is important, and it is recommended that you do not change the
# order in which HOOKS are added. Run 'mkinitcpio -H <hook name>' for
# help on a given hook.
# 'base' is _required_ unless you know precisely what you are doing.
# 'udev' is _required_ in order to automatically load modules
# 'filesystems' is _required_ unless you specify your fs modules in MODULES
# Examples:
## This setup specifies all modules in the MODULES setting above.
## No raid, lvm2, or encrypted root is needed.
# HOOKS="base"
## This setup will autodetect all modules for your system and should
## work as a sane default
# HOOKS="base udev autodetect block filesystems"
## This setup will generate a 'full' image which supports most systems.
## No autodetection is done.
# HOOKS="base udev block filesystems"
## This setup assembles a pata mdadm array with an encrypted root FS.
## Note: See 'mkinitcpio -H mdadm' for more information on raid devices.
# HOOKS="base udev block mdadm encrypt filesystems"
## This setup loads an lvm2 volume group on a usb device.
# HOOKS="base udev block lvm2 filesystems"
## NOTE: If you have /usr on a separate partition, you MUST include the
# usr, fsck and shutdown hooks.
HOOKS="base udev autodetect modconf block filesystems keyboard fsck"
# COMPRESSION
# Use this to compress the initramfs image. By default, gzip compression
# is used. Use 'cat' to create an uncompressed image.
#COMPRESSION="gzip"
#COMPRESSION="bzip2"
#COMPRESSION="lzma"
#COMPRESSION="xz"
#COMPRESSION="lzop"
#COMPRESSION="lz4"
# COMPRESSION_OPTIONS
# Additional options for the compressor
#COMPRESSION_OPTIONS=""
rebuilt the kernel with `mkinitcpio -p linux` and rebooted. It seems to be working. What I don't know is why. Anyway, I wanted to post this in case someone comes across the same problem with HP Compaq <615> k10temp driver. I still get the error
/usr/bin/pwmconfig: There are no pwm-capable sensor modules installed
so I can only guess that for this specific laptop, there is an IRQ problem, and using `noacpi` solves it. This is the 6th time I've rebooted without hearing the fans at max, when I use the machine, the fan speed is adjusted for the tempereature, even without pwmconfig/fancontrol. My guess is that BIOS is doing it, if someone knows more about this stuff, I would like to hear abuot it. I'll use the machine for the next few days, if the fans behave properly, I'll mark the thread solved.

2009 17" Macbook Pro fans running at max speed aafter hard drive upgrade.

I recently picked up a 17" 2009 unibody MacBook Pro with Intel Core 2 Duo 2.8ghz, 4gb RAM, SuperDrive and a Samsung 1TB hard drive. The system did not come with the original hard drive and I don't have any other hard drives to test and verify that the new larger hard drive is the cause. I have tried a clean install of Snow Leopard, Lion and even Mountain Lion but no matter what my fans always running at max speed (5k+ RPM). I have looked at iStat and the temps of any of the components in the machine never show more than 42*C so the fans should never be running at full blast. Oddly enough smcFanControl shows 0* temp but fan speds for both left and right are always 5.5k+ and very noisy. Using HDD Fan Control I am able to get at least the right fan to run at a controlable speed but its silence is drowned out by the left fan that still runs on full blast. I have already done multiple SMC resets and PRAM resets with no change in the condition. These noisey fans are driving me insane! I have run every available update as well. Is there a chance that the hard drive or something elses temp not being supported or detectable by OSX is causing the fans to default to the fail safe constant high speed?!

rriggin wrote:
I will have to try that when I get can find the original discs because I have been unable to boot into the diagnostic utility with my Snow Leopard, Lion, or Mountain Lion discs. More than likely I am thinking a sensor failure because even booting into Ubuntu Live USB thumbdrive the fans still run at max.
Well your just a regular pirate. There is no Mountain Lion disks, it's not even out of Beta and avaialble to the public yet
We thought you were just mistaken but now your tech handy enough to boot a Mac off a Linux live USB, so that means you've been bad and downloaded MT Lion off a P2P network or something.
If your beta testing 10.8 your bound to secrecy and not allowed to be discussing it and posting this sort of question on this forum, but the other one.
If you know anything, OS X must "talk" to the hardware or else the default setting is to race the fans. Linux doesn't do this by default as it's designed for generic PC's which a Mac may appear to be one it's not really. Apple only supports OS X and Windows 7 on Mac's, not Linux.
Obviously something on your machine is SEVERLY messed up in hardware, likely a dead sensor, you bought a used lemon that someone didn't want to pay to get fixed.
Want to try Linux?, read this

Airport Extreme + Airport Express and Max Speed. Does my solution work?

So, I am setting up a new network, with these parameters
1) Extreme - main station, broadcasting dualband 2.4Ghz 802.11b/g/n and 5 Ghz 802.11n
2) Express - to extend network
3) Max Speed!
So from what I've read, I could "simply" do this
On the Extreme set to broadcast SSID "XYZ" on both 2.4/5
On the Express set it to Extend "XYZ" on either 2.4 OR 5, not both.
And then presto, network. However, I'm thinking this is way to simple
So my question is
1) Does the Exteme only broadcasts one network on both bands? I have seen that some posters have suggested to broadcast "XYZ" on 2.4 and then call another "XYZ 5 Ghz". If I want to maximize throughput for all devices, what should I do? Range is not an issue, both signals are perfect.
Cheers

First, there is no assurance that 5 GHz will provide you with higher throughput if the signal has deteriorated due to distance or obstructions. It is not unusual to see the 2.4 GHz band providing better throughput if the signal must pass through a few walls to reach the Express.
The point is this....the Express will choose the best signal quality based a complex formula of speed and noise. If it "sees" a better signal at 2.4 GHz, that is where it will connect. If the 5 GHz signal is of high quality, the Express will connect at 5 GHz.
Your computer will do exactly the same thing. If you are in the same room as the main router, it will connect to 5 GHz. Walk the laptop down the hall past a few rooms and around the corner and it will most likely connect to 2.4 GHz.
If you have a Mac laptop handy, move it very close to the area where you plan to install the AirPort Express. Hold down the option key on the Mac while you click on the fan shaped AirPort icon at the top of the screen. Look at the Channel information to find out whether the laptop is connected at 2.4 GHz or 5 GHz.
That will be a good indication of the band that the Express will connect to. What are your results when you try this?

Re: Satellite L855 - max speed with newest SSD

I am looking to buy this notebook
+Message was edited: broken link has been removed+
(Croatian language, but will help)
I am wondering if there is SATA 6GB/s so I can buy newest SSD to use max speed?
thanks,
Mario

> I am wondering if there is SATA 6GB/s so I can buy newest SSD to use max speed?
I guess you are speaking about the Satellite L855 series since this model mentioned in your subject.
I dont think that Satellite L855 supports an SATA III HDD controller.
I think its SATA I, maybe SATA II
My notebook supports SATA I (1.5Gb/s) and I upgraded the unit with an SSD SATA III drive (6Gb/s). The SSD works fine but of course it does not reach the full 6Gb/s due to the HDD controller limitation.

Hub 1 max speed?

Hi,
A very quick question if I may?
What is the max speed that the version 1 of the BT Hub is capable of delivering?
Thanks,
Arnak
Solved!
Go to Solution.

Here are my home hub 1 stats. Upload speed is usually about 1.2 mb, but dropped due to some noise recently.
It will sort itself out eventually.
DSL Connection
Link Information
Uptime:
13 days, 10:20:51
Modulation:
G.992.5 annex A
Bandwidth (Up/Down) [kbps/kbps]:
846 / 12,437
Data Transferred (Sent/Received) [GB/GB]:
1.50 / 13.05
Output Power (Up/Down) [dBm]:
12.5 / 0.0
Line Attenuation (Up/Down) [dB]:
18.0 / 33.5
SN Margin (Up/Down) [dB]:
11.5 / 4.5
Vendor ID (Local/Remote):
TMMB / IFTN
Loss of Framing (Local/Remote):
0 / 0
Loss of Signal (Local/Remote):
5 / 0
Loss of Power (Local/Remote):
0 / 0
Loss of Link (Remote):
0
Error Seconds (Local/Remote):
1,201 / 0
FEC Errors (Up/Down):
0 / 662,385,328
CRC Errors (Up/Down):
0 / 31,836
HEC Errors (Up/Down):
0 / 29,524
There are some useful help pages here, for BT Broadband customers only, on my personal website.
BT Broadband customers - help with broadband, WiFi, networking, e-mail and phones.

Max speed with Auto Flip?

Hi!
I need to scan a few pdf documents at fast speed as part of my work. I set the Auto Flip speed to 0.02 seconds in page transitions. Is this speed too fast for a 60Hz monitor? Will Acrobat be able to display all pages at this speed or will it miss some pages out? Also, is there a drop in quality this way or will all the images and text be catched and displayed in full quality at 0.02sec autoflip speed?

> I am wondering if there is SATA 6GB/s so I can buy newest SSD to use max speed?
I guess you are speaking about the Satellite L855 series since this model mentioned in your subject.
I dont think that Satellite L855 supports an SATA III HDD controller.
I think its SATA I, maybe SATA II
My notebook supports SATA I (1.5Gb/s) and I upgraded the unit with an SSD SATA III drive (6Gb/s). The SSD works fine but of course it does not reach the full 6Gb/s due to the HDD controller limitation.

Max speed support on serial 2503

Hi All,
I have a router cisco 2503, I need to know what is Max. speed supported on serial interface? Presently we have 128KB leased line, and want to know weather I can upgrade the leased line to 256K with the same router ?
THanks,
A.S

Hello,
if you are referring to the two serial interfaces on your 2503, these are high-speed serial interfaces, which support speeds up to 2048kbps, or roughly 2MB.
Check this link for more details:
Cisco 2503 Router
http://www.manucomp.com/cisco_catalogue/cisco_2503_router.html
HTH,
GP

Max speed 1.0Mbps?

Why is the max speed that I get with my WRT150N 1.0Mbps? It doesn't matter where I'm at in the house, it doesn't matter if its an HP laptop, Dell laptop etc...the max speed i get is 1.0Mbps?

What is the speed you are getting when you connect the computer straight to the Modem...?
What is the speed you are getting on the wired computer(computer connected to the router via ethernet cable)...?
Try upgrading your Router's Firmware and then reconfigure it...
Go to website linksysbycisco.com/downloads.........insert model no of your router in serach tab......select proper version of your router........download the firmware file......save that file on desktop
Follow these steps to upgrade the firmware on the device : -
Open an Internet Explorer browser page on a computer hard wired to the router...
In the address bar type - 192.168.1.1...Leave the Username blank & in Password use admin in lower case...
Click on the 'Administration' tab- Then click on the 'Firmware Upgrade' sub tab- Here click on 'Browse' and browse the .bin firmware file and click on "Upgrade"...
Wait for few seconds until it shows that "Upgrade is successful" After the firmware upgrade, click on "Reboot" and you will be returned back to the same page OR it will say "Page cannot be displayed".
Now reset your router :
Press and hold the reset button for 30 seconds...Release the reset button...Unplug the power cable from your router, wait for 30 seconds and re-connect the power cable...Now re-configure your router...
If your Internet Service Providor is Cable follow this link
If your Internet Service Providor is DSL follow this link

How can i measure the speed of the fan in sound and vibration signal simulator box

how can i measure the speed of the fan in sound and vibration signal simulator box
provided the values tach out:2 pulses/revolution and maximum speed = 6000rpm

Hi. I tried your suggestion and I could not get it to work well. In
fact it worked better without the running average (which suprised me).
I also played with the number of data points but still could not get it
to work well.
Do you have any other suggestions on how I could sort this problem out?
I
have attached a screen shot of the signal. To recap, I'm trying to
measure the'y' position of the flat regions of the signal. The signal
does not have a constant level, so this 'y' position varies with time
in a non-unform manner.
I am currently differentiating
the signal and selecting the y position when the differential is equal
to zero (within a tolerance band).
In the screenshot, the
signal has been zeroed using the method I have described above.
However, it occasionally has glitches which may be caused when the code
picks up a zero gradient at a peak or valley in the signal.
I therefore need some kind of algorithm that only measures the position of the flat regions.
Many thanks
John
Attachments:
screenshot.gif ‏121 KB

What is the average speed for the fans? Mine seem really slow.

What is the average speed for the fans in a MacBook Pro? When my computer is fairly idle, like right now, the fans are at roughly 1000 rpm each. Is that normal? I have seen posts where the fans are 2500-5000 rpm, so mine seem a bit low. That may explain why my computer has been getting hotter more quickly lately - this started happening after Apple replaced my logic board a few days ago.

I installed smcFanControl2 and according to that program, Apple's defaults are 2,000RPMs and the program will not let you set it any lower than that because of the increased risk of damage.
My fans are always at 2,000RPMs during normal usage, and then once I fire up a DVD or Photoshop it usually goes up to the 3,000s or so.

Cpu fan stuck at max speed

Out of nowhere, my computer (early 2006 20" Intel iMac) started making huge fan noises. The iStat pro widget shows that the CPU fan is blowing at 3600 rpm (apparently the max), and the other two fans are normal. CPU usage is minimal, and CPU temperature is low (30-40 degrees C), so there's no good reason for the fan to go to the max.
I've tried (several times) to reset the SMC, but it doesn't help. A couple times over the past five days, it's gone back to normal, but then it soon goes back to max.
Anybody experienced anything like this? Any suggestions?
Thanks in advance,
Neil

I have the same problem,
I know a lot about computers (for not a professional) and after doing anything i can without opening the case,(SMC reset, Vram reset, safeboot and starting on verbose,Apple hardware test)
In my specific problem the facts are
4SNS/1/40000000:'TmOP' from apple hardware test
Cpu Fan: 3604rpm (really high) this is the logic board fan
the other 2 fans are normal
Cpu tmp: 28 C (low)
GPU diode 127 C (ridiculously high - no tmp variation) from Istat pro
Memory controller 127 C (ridiculously high - no tmp variation)
all the other temperatures, as the cpu ,are a little bit lower than normal which is normal because of the high speed fan
that means logically that the system is reading a 127 Celsius tmp in these places
and the fan is responding right
So the tmp sensor is sending a false tmp
there are 3 sensors this one is on the logicboard and you cannot change it
i went to a certified apple service provider and we open the case together,
as i wanted to be there.
I hoped with some dust cleaning or something position related we could do something but no, after checking every possible solution,
needs a logiboard replacement that he (like me) did not recommended (very expensive)
Other than the fan noise there is(until now) no other symptom, in OSX or XpPro
so I'm not going to pay about 700 euro (for everything) for this machine
I'm positive (i checked it myself) that there is nothing hot inside, just the sensor circuit is stuck at these tmp
If the the fan dies sooner its much cheaper and i can even replace it myself
I 'm very sad and disappointed with this solution but what can i do?
It is just 2 months after the warranty! and i know that this is a logicboard defect
the ironic thing is that before that happened i was thinking o upgrading the Cpu 2.0CD to a 2.33C2D (yes you can, if you really want) but now i 'm going to leave it like this and sometime buy a new thing (not an imac again!) a mac pro if i am richer or a decent PC
I really like macs and everything, but the compact feature when the time comes may have a compact problem!
the other funny thing is that they offer me a job in the Service place but i am an artist
Good luck and i hope someone finds a solution or something else

Fans always max speed from boot

Hi,
my macbook pro unibody (15") has fans always on at maximum speed even. No matter the temperature of cpu or % of CPU activity (smcfan is of no use). Batteries drained in one hours...no use of a portable,
After an hardware check it seems some temperature sensor were not working properly.
I've got my logic board changed and.......fans keep running at top speed and now also keyboard backlight is gone....any suggestion...I'll ask to change the machine that is clearly faulty somewhere...
Any hints from Apple?
Ciao
Nik

Have you tried running the extended version of the Apple Hardware test? If you get an error code indicating the sensors, it may be that they were not properly plugged into the logic board following the logic board replacement. If the sensors are not sensing the temperature, the fans will run all out by default. If the sensors themselves are faulty, then replacing the logic board will not cure the problem.
For the backlight, check in System preferences>Keyboard & Mouse> Keyboard and make sure the box is checked to illuminate the keyboard under low light conditions. If it is and the keyboard still does not light, the keyboard backlight flex cable may not have been well seated.
Who did the repair? Apple or an AASP? If the latter, it may be worth trying someone different. It sounds like the logic board replacement may not have been done as carefully as it should have been.
Good luck!

Max speed of my fan

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