The Ultra X4 Modular Power Supply! 1600 Watts of power! Ultra has taken a whole new route to computer power supplies with the Ultra X4 Modular Power Supply. With Ultra's patened Modular Design, you only connect the cables which you need increasing airflow and giving your chassis that nice clutter-free look. The Ultra X4 Modular Power Supply uses a 135mm fan improves airflow throughout the chassis while keeping noise at a minimum. The Ultra X4 Modular Power Supply is intergrated short circuit protection and thermal overload sensors automatcially protects the PC when surges or overheating become an issue. With 3 year standard and lifetime warranty available upon registration, Ultra's customer service meets the highest industry standards.