The power consumption of desktop computers mainly depends on their internal configuration, including the power consumption of various components such as CPU, motherboard, graphics card, hard drive, and memory. Generally speaking, the power range of home desktop computers is between 50 watts and 400 watts, while the actual power of most home desktop computers is around 230 watts to 300 watts.
The power consumption of each component is roughly as follows:
CPU： The power of mainstream CPUs is around 50 watts to 100 watts, but in actual use, due to the CPU being mostly in a waiting task or low load state, its actual power consumption will be lower than this value.
Motherboard: The power consumption of the motherboard is relatively low, usually between 20 watts and 35 watts.
Graphics card: The power consumption of graphics cards varies greatly, ranging from integrated graphics cards with over ten watts to high-end discrete graphics cards with over a hundred watts. The power consumption of mainstream graphics cards is around 70 watts to 100 watts.
Hard drive: The power consumption of hard drives is relatively low, with mainstream hard drives currently consuming around 25 watts.
The power consumption of components such as memory, network card, and sound card is very low, usually not exceeding 40 watts when combined.
It is also necessary to consider the power consumption of external devices such as fans, keyboards, mice, etc. inside the chassis, as well as the power consumption of the display. Generally speaking, the power consumption of LCD displays is below 40 watts, while the power consumption of CRT displays is relatively high.
It is common for the total power consumption of a home desktop computer to be around 300 watts. But this is only a rough value, actual power consumption will be affected by various factors, such as the computer's usage status (standby, light load, heavy load, etc.), ambient temperature, hardware configuration, etc.
In order to ensure the stable operation and prolong the service life of the computer, it is usually recommended that users choose a power supply with slightly higher power consumption than the actual power consumption. Generally speaking, the rated power of the power supply should be greater than the actual power consumption of the computer and leave a certain amount of redundancy. For example, if the actual power consumption of a computer is around 300 watts, it is recommended to choose a power supply with a rated power of 400 watts or higher.
The maximum power of a desktop computer can reach several hundred watts, but the specific value may be affected by various factors. When choosing a power supply, users should choose the appropriate one based on their actual needs and computer configuration.