The Lenovo 500W power supply (PSN 5P51D77197) is a reliable internal power solution for compatible Lenovo desktop computers and workstations. This 500-watt unit provides stable power distribution to support standard computer components such as processors, memory, storage devices, and expansion cards. The power supply features standard ATX compatibility with multiple power connectors, including a 24-pin motherboard connector, a 4-pin CPU connector, SATA, and peripheral connectors for various system configurations. With high-quality components and efficient power regulation technology, this unit ensures consistent voltage outputs with minimal electrical interference and voltage fluctuations. The compact design measures approximately 150 mm in width, 86 mm in height, and 140 mm in depth, fitting into standard ATX power supply cases. Weighing around 1.2 kg, it includes a temperature-controlled cooling fan that automatically adjusts its speed according to thermal load, maintaining optimal operating temperatures between 0°C and 40°C ambient temperature. The power supply achieves typical efficiencies of 80 percent or higher under normal load conditions, reducing energy consumption and heat generation. All electrical outputs comply with international safety standards, including overvoltage, overcurrent, and short circuit protection. The unit connects via standard AC input with 100-240V at 50-60Hz, making it suitable for global use. This power supply is designed for long-term reliability in office environments, private households, and light commercial computing applications, where consistent power supply is crucial for system stability and component lifespan.