Why the CPU temperature is so high?

My NB Model #MB466, the CPU temperature is 40-50C under normal running and the fan is 2000rpm (I use iStat). When the CPU usage is about 80%, the temperature goes up to 70 or 80C, I can feel it, especially the bottom area of the screen, and the fan goes up to 4000rpm.
Is this normal?

My new Aluminum MacBook can get pretty hot when I play Spore or use an iTunes visualizer. The hottest I've seen (according to iStat Menus) is 194 degrees fahrenheit and 5637 rpm. I think they won't go too much farther. If something meets the system requirements, it should be fine.

Similar Messages

CPU temperature is too high in Solaris 10 sun fire v890 machine

Hi,
I just installed Solaris 10 on a sun fire v890 machine. I used the prtdiag -v command to check the system.
However, It appears to me that the CPU temperatures is higher than the temperature range specified in the technical specification. The server is a standalone node that does not connect to the network or process anything.
Is it a problem? Thank you.
========================= Environmental Status =========================
System Temperatures (Celsius):
Device Temperature Status
CPU0 77 OK
CPU1 76 OK
CPU2 77 OK
CPU3 74 OK
MB 28 OK
IOB 24 OK
DBP0 23 OK
Environmental
AC power      200-240 VAC, 47-63 Hz, 2078 VA
Operating temperature
* 5� C to 35� C (41� F to 95� F), 20% to 80% relative humidity, non condensing, 27� C max. wet bulb
* 2.1 GHz UltraSPARC IV+ processor: ASHRAE Class 3 (35C/900m) and/or 28C/10kft
Non operating temperature      -20� C to 60� C (-4� F to 140� F), 95% at 40� C relative humidity, non condensing
Regards,
Ryan

Hi Rukbat,
Thanks for your reply.
I have displayed the verbose prtdiag -v on the v890 machine.
However, I couldn't find the hard-coded operational ranges. Could you please advise?
Hi Sun-worshiper,
I executed the command and couldn't find the targeted temperature.
bash-3.00# prtpicl -v -c temperature-sensor | more
CPU0_DIE_TEMPERATURE_SENSOR (temperature-sensor, 8d00000e17)
:PSVC_FRU (8d00001ec9TBL)
| (8d0000124bH) |
:PSVC_PHYSICAL_DEVICE (8d00001da6TBL)
| (8d00001278H) |
:PSVC_PARENT (8d00001867TBL)
| (8d00000dadH) |
:PSVC_TS_OVERTEMP_LED (8d00001649TBL)
| (8d0000101aH) | (8d00000de3H) |
:HighShutdownThreshold 105
:HighWarningThreshold 100
:LowShutdownThreshold -15
:LowWarningThreshold -10
:Temperature 52
:FaultInformation NO_FAULT
:State OK
:_class temperature-sensor
:name CPU0_DIE_TEMPERATURE_SENSOR
CPU2_DIE_TEMPERATURE_SENSOR (temperature-sensor, 8d00000e35)
:PSVC_FRU (8d00001ed2TBL)
| (8d0000124bH) |
:PSVC_PHYSICAL_DEVICE (8d00001dafTBL)
| (8d00001287H) |
:PSVC_PARENT (8d00001870TBL)
| (8d00000dadH) |
:PSVC_TS_OVERTEMP_LED (8d00001655TBL)
| (8d0000101aH) | (8d00000de3H) |
:HighShutdownThreshold 105
:HighWarningThreshold 100
:LowShutdownThreshold -15
:LowWarningThreshold -10
:Temperature 52
:FaultInformation NO_FAULT
:State OK
:_class temperature-sensor
:name CPU2_DIE_TEMPERATURE_SENSOR
MB_AMB_TEMPERATURE_SENSOR (temperature-sensor, 8d00000e8f)
:PSVC_FRU (8d00001ef6TBL)
| (8d0000125aH) |
:PSVC_PHYSICAL_DEVICE (8d00001dcaTBL)
| (8d000012f0H) |
:PSVC_PARENT (8d0000188bTBL)
| (8d00000b34H) |
:PSVC_TS_OVERTEMP_LED (8d00001679TBL)
| (8d0000101aH) |
:HighShutdownThreshold 75
:HighWarningThreshold 70
:LowShutdownThreshold -15
:LowWarningThreshold -10
:Temperature 28
:FaultInformation NO_FAULT
:State OK
:_class temperature-sensor
:name MB_AMB_TEMPERATURE_SENSOR
IOB_AMB_TEMPERATURE_SENSOR (temperature-sensor, 8d00000e99)
:PSVC_FRU (8d00001eedTBL)
| (8d0000125fH) |
:PSVC_PHYSICAL_DEVICE (8d00001dcdTBL)
| (8d000012f0H) |
:PSVC_PARENT (8d0000188eTBL)
| (8d00000b34H) |
:PSVC_TS_OVERTEMP_LED (8d0000167cTBL)
| (8d00001014H) |
:HighShutdownThreshold 53
:HighWarningThreshold 48
:LowShutdownThreshold -15
:LowWarningThreshold -10
:Temperature 25
:FaultInformation NO_FAULT
:State OK
:_class temperature-sensor
:name IOB_AMB_TEMPERATURE_SENSOR
DBP0_AMB_TEMPERATURE_SENSOR (temperature-sensor, 8d00000ed9)
:PSVC_FRU (8d00001ef0TBL)
| (8d00001322H) |
:PSVC_PHYSICAL_DEVICE (8d00001dd0TBL)
| (8d00001304H) |
:PSVC_PARENT (8d000018afTBL)
| (8d00000eadH) |
:PSVC_TS_OVERTEMP_LED (8d0000167fTBL)
| (8d00001014H) |
:HighShutdownThreshold 55
:HighWarningThreshold 51
:LowShutdownThreshold -15
:LowWarningThreshold -10
:Temperature 26
:FaultInformation NO_FAULT
:State OK
:_class temperature-sensor
:name DBP0_AMB_TEMPERATURE_SENSOR
Regards,
Ryan
Edited by: puikeong on Mar 5, 2008 6:45 PM
Edited by: puikeong on Mar 5, 2008 6:47 PM

Satellite M100 - I can't analyse the CPU temperature

I'm an owner of Toshiba Satellite M100 series (Core Duo T2300, X1400, etc.). The problem is that I can't analyse the CPU temperature changes in such popular application like Everest or Notebook Hardware Control. Also any other software provided by Toshiba and already installed on my HDD doesn't include some CPU diagnostics including the temperature changes!
The only software which seems to be working is the HWiNFO32 so there is some thermal sensor inside which reads this temperature of Centrino Duo processor, but this software is not very user-friendly :(
There is a request for Toshiba to do something with this... I've upgraded BIOS in my model to a version 1.70 but it didn't change anything I could easily notice (or is there any?) :(

Hi
Like Mike said the BIOS update has nothing to do with the CPU temperature monitoring.
The fact is that Toshiba doesnt support any 3rd party applications.
However, all the temperature programs are not precise and dont get exactly information about the temperature. Only the programs with a physical temperature sensor will give you a exactly temperature.
I dont understand why its so important for you to know the temperature. The Toshiba notebooks support an overheating protection and if the temperature increases to the critical level so the unit shuts down automatically.

How Far Off Is the CPU Temperature On A K9N6PGM2-V (MS-7309) Motherboard?

I have read on other sites that these boards have inaccurate cpu temperature readings in the bios. I am wondering how much these temperatures are off, if they even are. I have an AMD Athlon X2 4200+, Bios version 9.2. Thanks for your help.

Quote from: hunterman439 on 28-March-09, 22:54:04
Thanks for all replys,
Sometimes when I turn the computer on and go into the Bios the cpu temperature is already at about 115F. This isn't terrible or anything, but it seems a little hot for just starting the computer.
115 Fahrenheit = 46,1111111 graden celsius
That's quite normal, nothing to worry about, BIOS temps are always a bit higher then idle temps.
Please use C as everybody uses that in the forum, thanks.

CPU temperature seems rather high

I have a Lenovo Thinkpad R61, and my temperature under normal load seems to stagnate around 50 degrees Celcius, which seems kind of high. When put under heavy load (compiling a kernel) it steadily rose to around 66 degrees celcius before I stopped the operation. While under heavy load, /proc/acpi/ibm/fan reported 3202, and under normal load now it reports 3125. Is it just me, or this CPU temperature kind of high? What can I do about it?
PS: Because it's a thinkpad, I can't use lm_sensors. thinkpad_acpi module takes care of such things.
Last edited by violagirl23 (2008-06-02 07:34:56)

[rant]
Hah, IME laptops = heaters.
Even my dinosaur P2 celeron lappy gets to 70C CPU under load BEFORE the BIOS turns on the fan.
I think the idea is to hold off running the cooling as long as possible so cpuidle/speedstep can allow the chip to cool before using battery to run the fan.
As for the AC adaptor heating up, this smacks of poor design, the PSU should be able to maintain full load + battery charging for at least as long as a full charge from empty takes. Anything else is cutting corners based on 'yeah but how often will THAT happen'.
If your ACPI setup is not doing what it should, power consumption + heat output will be excesive under no/low load but full load power is full load power, as there is nothing to turn off.
My attitude would be, set up acpi and speedstep then ignore the temps. If it cooks under load then the hardware cooling solution is rubbish.
Seriously though, your temps sound quite normal. Look up the specs for your CPU on processorfinder.intel.com (or the AMD equivalent) you will probably be surprised at how high the max temperatures are. As for the AC adaptor - Don't run full speed while the battery is charging? The damn thing should be designed to handle it.
Do try and keep the HDD cool if you can - it is spinning down when not used right? Modern HDDs generate a fair bit of heat themselves when running and there ain't much airflow around the disc in most laptops.
EDIT: your HDD temps look sweet.
Have you played with laptop_mode?
[/rant]
Steve.
Last edited by steve_v (2008-06-07 02:30:59)

Why the CPU Frequency will just stated at 1189MHz when the X230 had AC Power ONLY (Battery Removed)?

Dear All,
I bought a X230 (i7) notebook. I found that if removed the battery from the notebook and only use AC power with the X230 Notenook. The CPU frequency will stated at 1189MHz. It will not change no matter how many program the notebook is running. The CPU frequency will rise to 2.9GHz or upto Turbo when the Notebook with battery or battery and AC power. Why the CPU Frequency will just stated at 1189MHz when the X230 had AC Power ONLY (Battery Removed)? This is not right. Any setting in the X230 Notebook need to change? Please help.
Solved!
Go to Solution.

RichardW wrote:
The situation is probably the same as it was for the X220. A 65W power adapter by itself doesn't provide enough power to run the computer at full speed, but it can when combined with a battery. However the 90W adapter may be able to run the computer at full speed without a battery.
As it was with earler X-series. This is by design. It allows people to travel with the smaller, lighter 65W adapter. However for maximum speed and flexibility it's best to always use the 90W adapter.
Cheers... Dorian Hausman
X1C2, TPT2, T430s, SL500, X61s, T60p, A21p, 770, 760ED... 5160, 5150... S360/30

My macbook pro cpu temperature is too high??please tell me correct fact and information

i mistake deleting my activity.......re question...
I'm using macbook pro retina 13inch 2013 late version.
my macbook has NO external graphic card, just iris graphic.
when i was playing diablo3 or watching movie by using bypass ip address, my cpu temperature was maintained 90~100 celcius degrees.
And at the same time, my cooling fan was maintained 5800~6000 rpm.
There are two questions.
One, is my macbook temperature too high or normal level ?
Two, i know that 6200rpm is maximum speed of cooling fan. Why did fan run 5800~6000rpm, not maximum?

When processor intensive activities are taking place, temperature may reach the maximum level.
     Reset SMC.     http://support.apple.com/kb/HT3964
     Choose the method for:
    "Resetting SMC on portables with a battery you should not remove on your own".

Is there a way to change the CPU temperature at which fans kick in?

Well, the subject says it all. The fan in my MBP will not kick in until the CoreDuo reaches 94 C, and then drops it off to about 86-88 degrees. Normally, however, the CPU temp does not get higher than about 75 degrees, and most of the time it is below that.
However, reading from other posters, it appears that for several of the MBP the fans kick in at about 85 degrees, cool it off to below 80. I am thinking that the fans in my MBP not kicking in until 94 C could be due to:
1- Faulty temperature detection by some unit or another
2- Faulty fan (though a number of Hardware tests have not revealed anything, and I hear the fans loud and clear)
3- Different Temp monitors outputing slightly different readings (I am using Temperature Monitor. Another program, CoreDuo Temp gives the same reading)
Any help?

My guess would be that you have a particularly bad thermal paste job. If you can demonstrate at the store that the fans don't kick in before 95 C, you might be eligible for an exchange. My advice would be to go complain about it.
Ps. CoreDuoTemp and Temperature Monitor both use the speedit.kext, the latter just doesn't give credit.

How to read the CPU temperatures of a RT PC [LabVIEW RT]

Hi,
I am programming a stand-alone RT application with LabVIEW RT that runs on a regular PC.
I would like to monitor the different system temperatures (CPU,...) and if possible the fans speed.
I found an example that performs this task for PXI systems but not for regular PC.
Does anybody know if this is possible and how I can do it?
Thanks

Here is a solution that reads the temperature via a VBS script. The script uses WMI to access the Temp.
Saved as LV 8.0
Robert 'Red' Hoar
Staff Systems Engineer
Certified LabView Developer
www.vi-tech.com
(972) 233-1950 x 208
[email protected]
(Cell) (817) 312-5413 (Fax) (972) 233-1550
Message Edited by srhoar on 05-15-2008 11:34 AM
Attachments:
Read CPUTemp with vbs script 1.zip ‏17 KB

HD doesn't operate when the ambient temperature is too high

Hi
I've got an iBook 800 and the internal drive starts to click when the temperature in the room is a little, or so it appears. Is there any known issue with this?
I think I am about ready to replace the drive but some insight would be great.
I wouldn't want to throw away an otherwise good drive.
Throw in your two cents.

Alexander, some of the other threads here may offer some points to work through to check the actual status of the HDD - maybe it is on its way out?

Tweak the balance between fan speed and CPU temperature / Dell M6400?

Hi all,
I have a Dell Precision M6400 17" laptop. It runs really well on Arch, but is a bit noisy. It has always been noisy, btw, but I recently noticed that the CPU fan was blowing a lot of air even though the CPU temperature is lower than 70°C. I also have a macbook air, and its CPU runs at 70°C all the time, which seems to be normal. I would like my m6400 to behave similarly, and I'm sure someone here know how to change that
Hardware configuration
* Intel(R) Core(TM)2 Extreme CPU Q9300 @ 2.53GHz
* Quadro FX 2700M (G94M)
* 8Go RAM
* 2 hard drives
lspci output
00:00.0 Host bridge: Intel Corporation 4 Series Chipset DRAM Controller (rev 03)
00:01.0 PCI bridge: Intel Corporation 4 Series Chipset PCI Express Root Port (rev 03)
00:1a.0 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #4 (rev 02)
00:1a.1 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #5 (rev 02)
00:1a.2 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #6 (rev 02)
00:1a.7 USB controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #2 (rev 02)
00:1b.0 Audio device: Intel Corporation 82801I (ICH9 Family) HD Audio Controller (rev 02)
00:1c.0 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 1 (rev 02)
00:1c.1 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 2 (rev 02)
00:1c.2 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 3 (rev 02)
00:1c.3 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 4 (rev 02)
00:1c.4 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 5 (rev 02)
00:1c.5 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 6 (rev 02)
00:1d.0 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #1 (rev 02)
00:1d.1 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #2 (rev 02)
00:1d.2 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #3 (rev 02)
00:1d.7 USB controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #1 (rev 02)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev 92)
00:1f.0 ISA bridge: Intel Corporation ICH9M-E LPC Interface Controller (rev 02)
00:1f.2 SATA controller: Intel Corporation 82801IBM/IEM (ICH9M/ICH9M-E) 4 port SATA Controller [AHCI mode] (rev 02)
00:1f.3 SMBus: Intel Corporation 82801I (ICH9 Family) SMBus Controller (rev 02)
01:00.0 VGA compatible controller: NVIDIA Corporation G94M [Quadro FX 2700M] (rev a1)
03:01.0 CardBus bridge: Ricoh Co Ltd RL5c476 II (rev ba)
03:01.1 FireWire (IEEE 1394): Ricoh Co Ltd R5C832 IEEE 1394 Controller (rev 04)
03:01.2 SD Host controller: Ricoh Co Ltd R5C822 SD/SDIO/MMC/MS/MSPro Host Adapter (rev 21)
03:01.3 System peripheral: Ricoh Co Ltd R5C592 Memory Stick Bus Host Adapter (rev 11)
03:01.4 System peripheral: Ricoh Co Ltd xD-Picture Card Controller (rev 11)
09:00.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5761e Gigabit Ethernet PCIe (rev 10)
0c:00.0 Network controller: Intel Corporation Ultimate N WiFi Link 5300
output of sensors, idle:
acpitz-virtual-0
Adapter: Virtual device
temp1: +45.5°C (crit = +107.0°C)
coretemp-isa-0000
Adapter: ISA adapter
Core 0: +51.0°C (high = +105.0°C, crit = +105.0°C)
Core 1: +51.0°C (high = +105.0°C, crit = +105.0°C)
Core 2: +48.0°C (high = +105.0°C, crit = +105.0°C)
Core 3: +46.0°C (high = +105.0°C, crit = +105.0°C)
output of sensors when I start interacting (light browsing, mail, chat):
acpitz-virtual-0
Adapter: Virtual device
temp1: +59.5°C (crit = +107.0°C)
coretemp-isa-0000
Adapter: ISA adapter
Core 0: +63.0°C (high = +105.0°C, crit = +105.0°C)
Core 1: +63.0°C (high = +105.0°C, crit = +105.0°C)
Core 2: +62.0°C (high = +105.0°C, crit = +105.0°C)
Core 3: +63.0°C (high = +105.0°C, crit = +105.0°C)
When I start the laptop, its CPU fan stays at its minimal speed only for 1 or 2 minutes, then increases its rotation speed to a second level. It reaches it maximal speed only under heavy load, when the CPU reaches >80-95°C. I would rather let the CPU run a bit hotter before the fan starts to blow: let's say the fan could enter its intermediary speed between 70°C and 85°C instead of 55-80°C, and blow at is its maximum speed beyond that.
I checked the Fan Speed Control wiki page, but lm-sensors is not able to show me the status of the fans. Any idea ?
Aurel.
PS: the temperature of the GPU is not reported by sensors, and nvidia-settings reports around 60°C. Its dedicated fan is very quiet.

aurelieng wrote:
Hi all,
I have a Dell Precision M6400 17" laptop. It runs really well on Arch, but is a bit noisy. It has always been noisy, btw, but I recently noticed that the CPU fan was blowing a lot of air even though the CPU temperature is lower than 70°C. I also have a macbook air, and its CPU runs at 70°C all the time, which seems to be normal. I would like my m6400 to behave similarly, and I'm sure someone here know how to change that
Hi aurelieng,
I'm in the same situation from at least 1 month ( INTEL CORE 2 EXTREME X9100, 3.06GHz with 8GB ram, one solid state disk 128 GB, and one sata disk 500GB)
My dell M6400 has dual boot: ubuntu and windows7. The fan works a lot and continuosly in both environment and this is the reason because I have doubt that the origin of the problem is in hardware problem?
output of sensors when I start interacting (light browsing, mail, chat):
acpitz-virtual-0
Adapter: Virtual device
temp1: +41.5°C (crit = +107.0°C)
coretemp-isa-0000
Adapter: ISA adapter
Core 0: +41.0°C (high = +105.0°C, crit = +105.0°C)
Core 1: +41.0°C (high = +105.0°C, crit = +105.0°C)
Last edited by ginard (2012-11-16 18:09:19)

CPU temperature utilities...

I've used three different utilities to check CPU temperatures (Core 2 E6600, the heatsink is Zalman 9700LED):
pcAlert4
Core Temp v0.94
Intel Thermal Analysis Tool (TAT)
The Orthos Stress Prime provided 100% CPU utilization in addition to TAT. All three of the utilities showed different temperatures under the same load; Intel's TAT showed the highest and MSI's pcAlert4 the lowest temperatures. That's fine, although MSI really should get their own stuff right.
I've also noticed during testing that it doesn't make much of a difference, if the Zalman heatsink's fan runs at low, or high RPM; well, other than noise factor. The differences between the low/high RPMs from the temperature's perspective are 2-3 degree Celsius the most for both idle and 100% CPU utilization. That's hardly a reason to run the fan at high speed, especially when the temperature tops out at 55 degree Celsius with 100% CPU utilization for a prolonged time. At idle time the temperature of the CPU is around 32 degree Celsius, depending on which utility is red.
Is this normal for the Core 2 CPU, or neither of the utilities show the actual temperature of the CPU? I'm leaning toward the latter one.
TIA...
Cr00zng

Quote from: prc on 19-January-07, 15:42:14
Eeh.. warning. When I stopped my CPU fan my computer eventually crashed because Jmicron got screwed by heat and all my IDE HDDs disconnected while in Windows.
It took a moment to get Jmicron to detect HDDs again after shutdown, and once after that drives disconnected again in windows. Now it seems to work ok.
Tho maybe because I didn't bother to close my computer case, and that side panel has 2x120mm fans mounted on it, so there was only PSU's cooler running
Well, thanks for the warning; I did close the side panel, after I disconnected the heatsink's fan
I don't use JMicron; the four SATA drives are connected to Intel's controller. Additionally, the drives are in a separate compartment from the motherboard with it's own 120mm case fan to cool them.
The CPU temperature without the heatsink fan is 34/32 degree Celsius for core 1 and 2, which is just couple of degrees higher than with the fan running. Maxing out both cores to 100% with two instances of Ortho Beta running raises the temperature to 52 and 50 respectively. Playing GRAW without the heatsink fan running results in around 48 degree Celsius, which also just couple of degree more than the heatsink fan is running.
My initial suspicion of the two 120mm case fans around the heatsink are the reason why it doesn't really matter at what speed the heatsink fan is running at was correct. Yes, the case panels were in place and the three 120mm case fans and the power supply's fan were moving the air evidently rather well.
Quote
And if you are just curious. You will find some screen captures from my testing in this thread. (bottom of 1st page).
https://forum-en.msi.com/index.php?topic=104345.0
Nice experiment, which probably would've been better if you close the side panel.
My machine is still running just fine without the heatsink fan; the Zalman 9700LED is pretty darn good, it can keep the CPU at normal temperature without its fan. The Antec P180 case helps a lot, it has great airflow and not even noisy.
Well, this was fun; time to turn on the heatsink fan. I just feel better if it is running...
Cr00zng

What is Apple's stand regarding OWC offering to exchange the CPU in a new MacPro 2013?

I thought to have already put this question here a short time ago.
However I cannot find it for reasons I do not understand.
Therefore here a second try.
Since a couple of days OWC is offering to swap the CPU of a new ("End 2013") Mac Pro.
They pretend their CPUs are more powerful and less expensive.
They quote the "Magnuson Moss Warranty Act" which in the USA states that a manufacturer cannot force his customers to use only the replacement parts he sells.
In their view therefore Apple could not legally void the 1 year limited coverage or the 3 year Apple Care coverage because a third party (OWC) modifies a Mac Pro.
On the other side the only "user replaceable" part in a new MacPro End 2013 according to Apple and mentioned as such in their owners manual is RAM.
While OWC says that the exchange of the CPU is performed by "highly skilled Apple technicians", even if we accept this, those technicians are not doing it in the name and as employees of Apple but working for OWC.
Therefore, either Apple approves and agrees with the changes OWC makes to their new MacPros, in which case the customer will continue to enjoy full Apple support to the so modified machine, or such a step isn't at all done with Apple's blessing and voids every coverage by Apple.
I am therefore waiting for a urgently needed clarification of this matter by Apple.
If any such third part modification of an Apple product voids all commitments of Apple to the owner of that piece of equipment, people should be warned in time before taking any risk of that kind.
However until now I find no statement whatsoever coming from Apple, either approving such measures or disapproving them entirely.
Strangely OWC pretends to deliver by themselves full coverage to a modified computer and not only regarding the CPU they exchanged but the ENTIRE MacPro!
Should that be true, then why mention the "Magnuson Moss Warranty Act" to prove that Apple CANNOT legally refuse coverage to a computer they modify?
The second point difficult to understand is that such an entire coverage of a modified MacPro would mean being able to replace if necessary ANY PART in one of these new machines, something only possible if Apple delivers to OWC whatever they need.
I hardly believe that they could get by themselves any and every part of such a new computer bypassing Apple.
Surely Apple has exclusive agreements with the suppliers of at least most of the parts needed to assemble a new MacPro.
I believe that a clear statement of Apple regarding this matter should be made and the sooner the better!

Apple has not made any public statement that I've seen, and won't do so here, these being user-to-user support forums.
While OWC says that the exchange of the CPU is performed by "highly skilled Apple technicians", even if we accept this, those technicians are not doing it in the name and as employees of Apple but working for OWC.
That would correct. The technicians may be certified by Apple for doing Mac repairs, but the technicians will not be Apple employees.
The second point difficult to understand is that such an entire coverage of a modified MacPro would mean being able to replace if necessary ANY PART in one of these new machines, something only possible if Apple delivers to OWC whatever they need.
I hardly believe that they could get by themselves any and every part of such a new computer bypassing Apple.
Surely Apple has exclusive agreements with the suppliers of at least most of the parts needed to assemble a new MacPro.
OWC is not using any Apple-provided parts. They are getting processors from other suppliers.
The normal legal stance, at least in the US, is that a manufacturer cannot refuse warranty service due to a third-party or user modification unless that modification can be shown to have led to the problem. So whether Apple would refuse or accept warranty on a modified Mac Pro would depend entirely on what the problem is, but this is what OWC is referring to.
I very much doubt that Apple will make any statement on the issue other than to direct the user to the official warranty statement. For the US, see:
http://www.apple.com/legal/warranty/products/embedded-mac-warranty-us.html
but if they do choose to make a statement, it will not be here in these forums.
Regards.

Mac Pro 8-core X5365 CPU temperature

I've got an 8-core Mac Pro which is crunching SETI@home 24/7, with Hardware Monitor monitoring the CPU temperatures and other vital stats. After reading the Intel Quad-Core Xeon Proc datasheet, I'm a little edgy about the operating temperature of these X5365 CPUs, currently registering at 65 - 70ºC on load for each temperature diode, and fail-safe temperature set to 73ºC to disable SETI@home via Hardware Monitor. I also have smcFanControl speeding up the fans because my ambient temperature varies thanks to myself being in a tropical region, my ambient temperature can reach 33ºC at times, but down to 28ºC when air-conditioned.
My question is, what is the maximum temperature for these CPUs before they run into the risk of being fried/permanently damaged..?
Inputs from the Mac Pro-DC/grid community are also welcomed here.
Thanks.

my 8-core is running seti 24/7 since may without any problem, although my ambient temps dont rise above 30 degrees centigrade...and that's using the optimised apps which make the processor run hotter
the fans on the machine run 600-2000 rpm all day and all night, i dont expect it to lessen the life of the machine whatsoever. it should be capable of running flat out all its life, that is, after all why we spend so much on these machines in the first place !
if you only use 4 cores perhaps you should buy a 4-core mac ? he heh just joking...
as mentioned earlier, when things get really too hot the OS will shut the system down, and if that doesnt happen then the cpus themselves will shut down...
the heatsinks and fans on these machines are fully capable of coping if your macine is running withing the specified ambient temp range which for the mac pro is 10° to 35° if your seeing ambient over 35 then smc fan control is probably a good idea otherwise it should be fine

CPU temperature under Bootcamp with Windows 7

Hello,
In Windows 7 on Bootcamp (version 4.0), while watching youtube/flash or installing software (e.g. Adobe Acrobat updates), the CPU temperature on my new MBA (MacBookAir4,2 (13") - 1.7/4/256GB) goes pretty high, but ironically the fan speed does not increase to take care of that.
Attached is a screenshot I took using speccy, where we see that the CPU temperature is 94 C, but the fan speed is only 2001 RPM.
However, when I run OS X (Lion), the fan behaves normally and speeds up as necessary to accommodate the increase in CPU temperature.
Has anyone else experienced something like this while using Windows 7 under Bootcamp? And does this behavior seem normal?
Thanks!
Screenshot:

try Lubbo's Fan control.
http://sourceforge.net/projects/lubbofancontrol/
when you first run it immediately decrease the max fan speed to less than 3000. it's default value is crazy 6000 rpm.

Why the CPU temperature is so high?

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