Features Up to 4-Way NVIDIA SLI & AMD Crossfire X™ on demand Two-way Xeon CPU OC tuning for extreme performance superb scalability & connectivity with onboard U.2, M.2, & USB (Universal Serial Bus) 3.1 Type-C & Type-A Built with premium components for excellent power efficiency Easy Management & maintenance with ASUS Control Center (ACC) management software & USB (Universal Serial Bus) BIOS Flashback Up to 4-way multiple-graphic cards The Intel C621 chipset-based dual socket workstation motherboard features on-demand NVIDIA Ge Force SLI, NVIDIA Quadro SLI, & AMD Cross Fire X™ technology Extraordinary performance with dual Intel XEON CPU overclocking Dual Intel XEON CPU overclocking, pushes the power processing power beyond the extreme ASUS WS C621E SAGE breaks performance barriers, giving you the capability to overclock dual Xeon CPUs. With its unique BIOS mechanism dedicated to boosting CPU performance, WS C621E SAGE can deliver incredible system speed.