By combining an EE (Energy Efficient) platform with a quiet 135mm ball bearing fan, the ULT40071 X3 800-Watt Modular Energy Efficient Power Supply is super-efficient, using less electricity than other power supplies when providing power to your computer, and it generates less heat. Cooling is substantial yet silent by utilizing a thermostatically controlled 135mm ball bearing fan and a honeycomb-cut exhaust grill. The X3 also has full-range active PFC, which improves apparent power used by the computer. The modular interface allows you to only plug-in the cables you actually require for your particular PC. The X3 is ready for even the most high-end gaming rigs by providing up to four 6-pin PCI-e connectors, and the 800W and 1000W models provide the 8-pin PCI-e connector for the latest 300W graphics cards. If you're looking for an efficient, quiet, powerful, modular power supply with a Lifetime Warranty, there's no reason to look any further than the Ultra X3. No need to clutter-up your computer with useless cables. This not only increases airflow within your case, but it gives the inside of your case a clean professional look. The low noise 135mm fan will maximize airflow through the power supply as well as keep the noise level of your PC down. Flex-Force Cables are designed to be easily routed and hidden within your case while increasing the airflow. 800W (Full Load, Nominal Input Voltage) Total Output Power Meets ATX Version 2.2, v1.3, and ATX 12V Version 2.2 Specifications MTBF More than 100,000-Hours at Full Load 115V/230V AC Input Voltage 50-60Hz AC Input Frequencies 13A (RMS) for 115VAC input and 8A (RMS) for 230VAC AC Input Currents 110VAC and 25-degrees C Ambient Condition