CPU Power States (C-States)
General users rarely notice this state, usually only when using CPU-Z to monitor clock frequency and voltage. Only then will you notice it. Mobile processors have more C states than desktop ones. For example, a Core 2 Duo processor (Meron) will support the C0-C4 states, and a desktop Core 2 Duo processor (Conroe) will only support the C1-C0 state.
High-performance computers are a double-edged sword. Although they can bring fast data processing performance, the increase in power consumption has also become a headache. Because excessive power consumption will not only consume a lot of energy, but also increase the heat generated by the chip, affecting the stability and life of the electronic chip. (Recommended learning: PHP video tutorial)
So, how to reduce the power consumption of the chip and achieve energy saving?
From the perspective of hardware manufacturers, on the one hand, they can reduce energy consumption and heat generation by improving the chip process; on the other hand, by changing the working status of each electronic chip The operating mode can realize dynamic energy saving of the computer and respond to different processing loads with appropriate performance. This method is the energy-saving technology discussed in this article.
What dynamic energy-saving technologies are available in current mainstream processors, and how can we make full use of these technologies?
Intel C-State Tech is a deep energy-saving technology added by motherboard manufacturers to the BIOS. It automatically adjusts the power status of the processor according to its usage, thereby adjusting the voltage, frequency and power consumption of the processor.
C-State refers to the power consumption and temperature management state of the processor. Only in the C0 state, the processor is activated and can execute instructions; in the C1 to Cn states, the processor is in various degrees of sleep states, and sleep can bring about processor power consumption. of reduction. But in this sleep state, the processor has a wake-up time to return to C0, and different C-States consume different wake-up times.
Since Intel C-State Tech also requires the Northbridge chip and memory to adjust the voltage and frequency when the processor switches states and enter power-saving mode, it has relatively high hardware requirements for the entire platform.
If the quality of the motherboard is not up to standard or the memory is not of good quality, turning on Intel C-State Tech will cause frequent crashes in the Windows system. Conversely, if an Intel-based computer often freezes, you can check whether this option is enabled in the motherboard's BIOS.
For more PHP-related technical articles, please visit the PHP Graphic Tutorial column to learn!
The above is the detailed content of Is cstates on or off?. For more information, please follow other related articles on the PHP Chinese website!