XBENCH FOR POWERPC MAC OS X
XBENCH FOR POWERPC FULL
XBENCH FOR POWERPC SOFTWARE
XBENCH FOR POWERPC SERIES
XBENCH FOR POWERPC MAC

XBENCH FOR POWERPC FULL

Under full load the values can go up to 70 degrees Celsius (158 degrees Fahrenheit).

XBENCH FOR POWERPC MAC

The cooling system of the 'Power Mac G4 (Mirrored Drive-Doors)' is designed to hold the temperature of the processor board in a range of 58 to 60 degrees Celsius.

The maximum on-chip temperature for the PPC 970 is 85 degrees Celsius (158 degrees Fahrenheit), for the PPC 970FX it is 105 degrees Celsius (221 degrees Fahrenheit). Regarding concrete temperature values the following facts are known:įor computers with G5 processors, the design limits for temperature and fan speeds can be read out by using the MPU information panel of the application. For this reason it is impossible that your computer can be damaged in an overheat condition. All up-to-date Macintosh models automatically shut down or enter sleep mode if one of the readings exceeds a critical limit. In most cases however, the answer is 'yes'. Is this normal?Īpple doesn't publish any specifications for the temperature values measured at individual sensor locations. The application has to respect this information and cannot change this.

XBENCH FOR POWERPC MAC OS X

If you update to such an operating system, Mac OS X might qualify your processor as 'not capable of providing temperature readings' although it was accepted in earlier versions. Because - as mentioned before - this technology is very inaccurate, Apple has tightened the checks in the latest operating system versions whether the processor is capable of measuring temperatures or not. No, in this case you are using a processor with TAU. The application has to respect this information and cannot change this.Īfter an operating system update the CPU temperature is no longer displayed.

XBENCH FOR POWERPC SOFTWARE

If your computer contains a processor with TAU but is not displayed by the application as software sensor with the name 'Mach Kernel', Mac OS X has detected your processor as being 'not capable of providing temperature readings'.

XBENCH FOR POWERPC SERIES

Up-to-date versions of the G4 series no longer support temperature measurement on the chip die. Due to this problem, the processor manufacturers have disabled the TA Units for later product generations. For IBM G3 processors there can even be a difference of 20 degrees Celsius (68 degrees Fahrenheit) between the measured and the true values. Motorola specifies that the readings supplied by such processor types can be off by 12 degrees Celsius (21,6 degrees Fahrenheit) from the actual values. However, this technology is very inaccurate and only works correctly if each processor is calibrated. This is a technique to acquire temperature values directly on the chip die and compute it by the processor itself. Some older G3 or G4 systems can be equipped with processors containing a so called ' Thermal Assist Unit (TAU)'. Not the operating system but a self-contained control device monitors the readings in this case. In a few cases, sensors are indeed available, but they are not accessible by Mac OS X. Computers built by Apple before 2002 are usually not equipped with sensor technology and therefore cannot be supported. I wonder if my iBook fan stopped working because some OS X update decided there was no way to know the temperature on this machine!. PowerPC 970 (G5)The Temperature Monitor FAQ has some interesting information about the history of Mac temperature measurement, and how OS X has changed over time.Your Macintosh system is very likely not capable of providing temperature values if it has no temperature sensor and uses one of the following processors: It is very likely that your hardware is capable of providing temperature values even if it has no temperature sensor if your computer uses one of the following processors: Your only chance is to let the software analyze your particular computer. Unfortunately, this means it is impossible to predict if Temperature Monitor will run correctly on your hardware.

The computers known as 'iBook (Late 2001)' may have a PowerPC 750 cxe v 2.4, or a PowerPC 755 v3.1 inside, and so forth. For example, in the product series known as 'Power Macintosh G4 Cube', some systems are capable of providing temperature values and others are not. Apple appears to have shipped Macintosh product lines with same labels but different hardware inside.

Power Macintosh G4 (Mirrored Drive Doors)įor all other models, there is no easy answer: Analysis of over hundred Macintosh systems shows that there is no one-to-one-relationship between model name and support status possible.

This is why it's so hard to find something that works on my iBook: The following Macintosh models are definitely supported by Temperature Monitor, because they are equipped with dedicated temperature sensors: The most comprehensive sounding temperature monitoring solution yet.

Xbench for powerpc