Intel X99

[1][2]: 4–10, 70, 71 [8][9] Two Serial ATA (SATA) 3.0 controllers are integrated into the X99 chipset, providing a total of up to ten ports for storage devices and supporting speeds of up to 6 Gbit/s per port, with hardware support for the Advanced Host Controller Interface (AHCI) logical interface.

[1][2]: 4–10 [8][9] SATA Express and M.2 are also supported, providing the ability for interfacing with PCI Express-based storage devices.

[1][2]: 7, 9 [8] An Intel Gigabit Ethernet controller is also integrated, supporting (among other features) receive-side scaling (RSS) with two hardware receive queues.

That way, connectivity options of the X99 chipset may be adjusted to fit the needs of a particular motherboard implementation; for example, some of the SATA or USB 3.0 ports may be exchanged for additional PCI Express 2.0 lanes.

The chipset also integrates a Low Pin Count (LPC) interface, supporting interrupt controllers, timers, power management, super I/O, real-time clock (RTC), etc.