The Fatal1ty Series motherboard is designed with a 16 2 Power Phase, featuring sturdy components and completely smooth power delivery to the CPU. The X79 Professional Series motherboard offers unmatched overclocking capability and enhanced performance with the lowest temperatures for PC gaming enthusiasts. The Fatal1ty Mouse Port is a customizable technology for PC gamers that is a part of F-Stream. The Fatal1ty F-Stream tuning program is an all-in-1 software utility that supports overclocking and hard-ware tuning such as energy usage, H/W monitor, fan speed control, Fatal1ty Mouse Port Configuration and XFast RAM. In Hardware Monitor, it shows the major readings of your system. In Fan Control, it shows the fan speed and temperature for you to adjust. In Overclocking, you are allowed to adjust the CPU frequency, ratio and some voltages for optimal system performance. In Mouse Polling, gamers can freely adjust the mouse polling rate. In Energy Saving, the voltage regulator can reduce the number of output phases to improve efficiency when the CPU cores are idle without sacrificing computing performance. After plugging the USB mouse into the Fatal1ty Mouse Port and running F-Stream, gamers can use Fatal1tys personal preferred mouse polling rate at 500 Hz. F-Stream also provides the flexibility for gamers to adjust the mouse polling rate from 125 Hz to 1000 Hz. This is helpful for professional gamers to experience smoother game play and faster response time to the mouse PCIE 3.0 slots - Support 4-Way SLI, 4-Way CrossFireX The board comes with 4 x PCI-E 3.0 slots supporting NVIDIA 4-Way SLI and AMD 4-Way CrossFireX. PCI Express 3.0 slots maximize the bandwidth for the next-gen PCI Express 3.0 VGA cards, provide ultimate graphics performance.