No, there is no power supply with 100% efficiency. According to the laws of thermodynamics, it is impossible to achieve 100% efficiency in any system. In practical terms, power supplies typically have efficiencies ranging from 70% to 95%, with higher efficiency models being more expensive. Designing a power supply with 100% efficiency would require overcoming fundamental physical limitations, making it unattainable in reality. **

When choosing a power supply, it is important to consider the wattage needed for your system. Make sure to select a power supply that can provide enough power for all your components, with some extra headroom for future upgrades. Additionally, look for a power supply from a reputable brand with good reviews to ensure reliability and efficiency. **

When choosing between a System or Pure Power power supply, it ultimately depends on your specific needs and preferences. A System power supply is designed to provide stable and reliable power for your system components, ensuring smooth operation and longevity. On the other hand, a Pure Power power supply focuses on delivering clean and efficient power with minimal noise and interference, which can be beneficial for high-performance systems or sensitive components. Consider your system requirements and budget to determine which type of power supply would be the best fit for your setup. **

A power supply of 5V800mA would require a power supply that can provide at least 5V and 800mA of current. It is important to ensure that the power supply can deliver the required voltage and current without exceeding the limits to prevent damage to the device. It is recommended to use a power supply that can provide slightly more current than the required 800mA to allow for any fluctuations in power consumption. **

The choice between power supply and motherboard depends on the specific issue you are experiencing. If your computer is not turning on at all, it could be a problem with the power supply. However, if your computer is turning on but not functioning properly, it could be a problem with the motherboard. It's important to troubleshoot and diagnose the issue carefully before deciding which component to replace. If you're unsure, it may be best to consult with a professional technician. **

Yes, the continuous power supply in the vehicle does provide electricity. This power supply is typically used to keep the vehicle's electrical systems running, such as the lights, radio, and other electronic components. It also charges the vehicle's battery while the engine is running, ensuring that there is a steady supply of electricity available for use. **

Yes, the constant power supply in a vehicle does provide electricity. This power supply is typically provided by the vehicle's battery, which is charged by the alternator while the engine is running. The electricity from the constant power supply is used to power various electrical components in the vehicle, such as the lights, radio, and other accessories. It is also used to start the engine and operate the vehicle's electronic systems. **

The choice between a linear power supply and a switching power supply depends on the specific application and requirements. Linear power supplies are known for their low noise and high accuracy, making them suitable for applications that require precise voltage regulation and minimal electromagnetic interference. However, they are less efficient and generate more heat, which can be a concern in some applications. Switching power supplies, on the other hand, are more efficient and compact, making them suitable for applications where size and energy efficiency are important. They are also capable of handling a wider range of input voltages. However, they may introduce more noise and have lower output voltage accuracy compared to linear power supplies. Ultimately, the choice between the two depends on the specific needs of the application, such as size, efficiency, noise, and voltage regulation requirements. **