ASUS X99-Pro, the middle-variant of the company's mainline X99 series motherboards, started selling in the market. It follows the X99-Deluxe, the series flagship, and the cost-effective X99-A, and is slotted between the two. The X99-Pro is based on the same exact PCB as the X99-A, but with added features, which are blanked out traces on the latter. The two most notable differences between the two, are the WLAN + Bluetooth controller on the X99-Pro, covered by a decorative shroud running over the rear I/O area, covering the audio components; and an additional heatsink over some VRM circuitry south of the CPU socket, which is linked to the PCH heatsink by a heat pipe. The rest of the feature-set is identical between the two boards, ASUS is charging a $55 premium for the X99-Pro. This board is priced at US $330 on American etailer Newegg. The X99-A, on the other hand, is priced at $275 on the same site.