The CB series are available in two, ultra-high performance 1050W and 1250W models targeting high demanding PC setups such as workstations, enthusiast and high-performance gaming PCs with up to four high-end graphics cards using eight 6+2 PCI-E power connectors. Both CB models feature an 80 Plus Platinum rating, certifying its component selection and operation is of the highest quality. The PB series are available in 650W, 750W and 850W models, all featuring an 80 Plus Gold efficiency rating. Its large, 135mm fluid dynamic bearing fan is designed for long-life operation and features a smart fan control system that includes a semi-fanless mode, whereby below 20 percent PSU power output will shutoff the fan to eliminate noise.