The 80 Plus Gold certified XPG CORE REACTOR gives you 90% efficiency at 50% load. It comes in 650W, 750W, and 850W for different needs. XPG CORE REACTOR SERIES is certified by Cybenetics for its efficiency and noise level, scoring at the top of its category in both ETA and LAMBDA standards.For more information on XPG CORE REACTOR’s Cybenetics certifications, please visit XPG CORE REACTOR SERIES PSU - Cybenetics Labs – PSU Efficiency & Noise Level Certifications. Intelligent fan-curve provides near-quiet operations, even when at full power load. The fan control starts at a low 3.3v, 660rpm ± 10%, and remains at this speed until surpassing 50% load, prolonging the lifespan of the fan and the power supply unit. The XPG CORE REACTOR is compact in size due to the combination of high-quality components, a well-thought-out layout, and a new manufacturing process. What's more, its modular design reduces cable clutter and simplifies system building. Equipped with All 105°C Japanese capacitors, the XPG CORE REACTOR provides you with reliability and stability. The XPG CORE REACTOR’s DC voltage is maintained within ±2% and reduces ripple and noise by up to 35% for enhanced dependability. The XPG CORE REACTOR comes with an array of protection mechanisms for peace of mind and backed by a 10-year warranty. Over Current Protection (OCP) Over Voltage Protection (OVP) Under Voltage Protection (UVP) Over Power Protection (OPP) Short Circuit Protection (SCP) Over Temperature Protection (OTP) No Load Operation (NLO) Surge & Inrush Protection (SIP)