New old stock and unopened Coolmax ZX Series 500W ATC Power supply.This powerful COOLMAX power supply is perfect for any computer enthusiast. With a maximum power output of 500W and compatibility with both ATX12V 2.2 and EPS12V 2.91, it can handle even the most demanding systems. Its 80 Plus certification ensures maximum efficiency and reduced energy consumption, saving you money on your electricity bill. The ZX-500 model is also NVIDIA SLI certified, making it ideal for gaming setups. Purchase with confidence knowing you are getting a high-quality product from a reputable brand.