Over the weekend we showed you the first photos of ASUS’s ROG Zenith Extreme X399 motherboard, but even more detailed pictures have been leaked online. These show even more detail on the board and highlight some of its unique features. First let’s look at the CPU socket and surrounding area. The CPU is conditioned by a a high-current 8-phase VRM and to prevent overheating issues ASUS has developed an active VRM cooling solution by which heat is transported to a secondary heatsink under the rear I/O shroud by a heatpipe, which is then ventilated by a 40 mm fan, which vents air through the rear. You can see the air vents on the rear I/O shield.
If you were wondering why there are no M.2 slots on the motherboard itself it is because there is a hidden one, under the very large PCH heatsink. We really like this implementation as it keeps the overall look of the motherboard, and of course that heatsink will help keep your M.2 SSD nice and cool.
The next thing we see is the DIMM.2 accessory. If you were not sure how this worked it is very simple, you install your M.2 SSD on it and slide it right into the DIMM.2 slot on your motherboard. It has room for two more M.2 SSDs.
Finally we get a better look at the included expansion card, which is not for M.2 SSDs and is not a sound card, rather it is a network card. It has a 10 GbE interface driven by an Intel i211-AT controller.