 SATA Express and M.2 are also supported, providing the ability for interfacing with PCI Express-based storage devices.Each of the X99's SATA Express ports requires two PCI Express 2.0 lanes provided by the chipset, while the M.2 slots can use either two 2.0 lanes from the chipset itself, or up to four 3.0 lanes taken directly from the processor.As a result, the X99 provides bandwidths of up to 3.94 GB/s for connected PCI Express storage devices.