cpu core voltage
The working voltage of the CPU (Supply Voltage), that is, the voltage required for the normal operation of the CPU . Any electrical appliance requires electricity when working, and naturally has a corresponding rated voltage, and CPU is no exception.
The working voltage of the CPU has a very obvious downward trend. A lower working voltage has three main advantages:
The total power consumption of the chip using a low-voltage CPU is reduced. When power consumption is reduced, the operating cost of the system is reduced accordingly, which is very important for portable and mobile systems, so that the existing battery can work longer, thereby greatly extending the service life of the battery;
Reduced power consumption leads to reduced heat generation, and a CPU whose operating temperature is not too high can better cooperate with the system;
Reducing voltage is one of the important factors in increasing the CPU frequency.
The working voltage of the CPU is divided into two aspects, the core voltage of the CPU and the I/O voltage. The core voltage refers to the voltage that drives the CPU core chip, and the I/O voltage refers to the voltage that drives the I/O circuit. Usually the core voltage of the CPU is less than or equal to the I/O voltage.
The core voltage of early CPUs (286~486 era) was the same as the I/O, usually 5V. Due to the relatively backward manufacturing process at that time, the CPU generated too much heat, resulting in a shortened lifespan. However, the CPU integration level at that time was very low, and the CPU integration level was quite high, so it seemed that the CPU generated more heat. As the manufacturing process of CPUs improves, the working voltage of various CPUs has gradually declined in recent years. The core voltage of desktop CPUs is usually within 2V, and the working voltage of notebook-specific CPUs is relatively lower, thus achieving a significant reduction in power consumption. Purpose to extend battery life and reduce CPU heat generation. And the CPU will instruct the voltage regulator embedded in the motherboard to automatically set the correct voltage level through a special voltage ID (VID) pin.
Many motherboards for newer CPUs will provide special jumpers or software settings. Through these jumpers or software, the operating voltage of the CPU can be manually adjusted according to specific needs. Many experiments show that moderately increasing the core voltage during overclocking can strengthen the internal signals of the CPU, which will be of great help in improving CPU performance - but this will also increase the power consumption of the CPU and affect its lifespan and heat generation. It is recommended for ordinary users Don't do this.
In addition, starting from the Vinice core Athlon 64, AMD uses dynamic voltage on the processor with the Socket 939 interface. The default core voltage of the CPU is no longer marked on the CPU package. The core voltage of the CPU with the same core is Variable, different CPUs may have different core voltages: 1.30V, 1.35V or 1.40V.
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