This product is either discontinued or we cannot get that from suppliers.
Asus WS X299 PRO, Core X series (LGA2066), Chipset Intel X299, SATA 6Gb/s 6 x SATA 6Gb/s, SATA RAID 0/1/5/10, Realtek ALC S1220A, 7.1 Channels, Intel I210-AT, Dual 10/100/1000Mbps, 2 x RJ45, 1 x USB 3.1 Gen 2 (Type-A), 4 x USB 3.1 Gen 1, 4 x USB 2.0, 1 x USB 3.1, 1 x Optical, 1 x 8-channel Audio I/O, FF CEB, RGB.
WS X299 PRO includes a dedicated base-clock (BCLK) generator that extends CPU and memory overclocking margins. This custom solution works in tandem with the TPU to enhance voltage and BCLK overclocking control.