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As the sensor is located directly on the processor die, it provides most local and relevant CPU and GPU temperature readings. The silicon diodes have temperature dependency of -2mV per degree Celsius. Thus the junction temperature can be determined by passing a set current through the diode and then measuring voltage developed across it.
Different technologies have been discovered that can enable measuring power consumption in real-time. These technologies can be categorized into two main categories: direct measurement using subsystem power sensors and meters or indirect estimation based on provided information such as temperature or performance counters. [4]
The average CPU power (ACP) is the power consumption of central processing units, especially server processors, under "average" daily usage as defined by Advanced Micro Devices (AMD) for use in its line of processors based on the K10 microarchitecture (Opteron 8300 and 2300 series processors).
However, there's a multitude of free-to-use apps that manufacturers have developed to measure your CPU temperature, including Core Temp, HWMonitor or Open Hardware Monitor. ... If your CPU or GPU ...
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Cooling air temperature can be improved with these guidelines: Supply cool air to the hot components as directly as possible. Examples are air snorkels and tunnels that feed outside air directly and exclusively to the CPU or GPU cooler. For example, the BTX case design prescribes a CPU air tunnel. Expel warm air as directly as possible.
For example, a typical white LED output declines 20% for a 50 °C rise in junction temperature. Because of this temperature sensitivity, LED measurement standards, like IESNA’s LM-85 Archived 2017-10-18 at the Wayback Machine, require that the junction temperature is determined when making photometric measurements. [5]