ASUS unveiled its new flagship motherboard for the AMD platform, designed with out-of-the-box support for 2nd gen Ryzen Threadripper WX and X processors, the Republic of Gamers (ROG) Zenith Extreme Alpha. This board features an updated design aesthetic that's aligned with the company's latest ROG Extreme motherboards on Intel Z390 motherboards. The underlying PCB layout is entirely new, and different from the original Zenith Extreme, as are the heatsinks and shrouds covering various parts of the board, including a portion of its reverse side.

The I/O shroud which runs the entire length of the board is contiguous with a large RGB LED studded shroud covering the board's two M.2-2280 NVMe slots between PCIe slots. You get a U.2 port, and additional M.2 NVMe slots through the DIMM.2 riser accessory that's included with the board. ASUS has designed the CPU VRM of this board. It's still 10-phase on paper, but uses a high-end controller; and is tuned for overclocking the beastly Threadripper WX processors. Another killer feature with this board is 10 GbE wired Ethernet, driven by an Aquantia AQC-107 controller. You still get a 1 GbE driven by an i211-AT. ASUS appears to have done some cost-cutting with the WLAN card, though, which now only supports up to 1.73 Gbps 802.11ac MU-MIMO, compared to the original Zenith Extreme's 802.11ad draft controller with 4600 Mbps top-speed. The onboard audio solution is unchanged.

To cope better with AMD 2nd generation Ryzen Threadripper processors, which come with up to four active dies on the MCM (multi-chip module), ASUS is giving away free Cooling Kits to owners of its socket TR4 motherboards, such as the ROG Zenith Extreme, ROG Strix X399-E Gaming, and Prime X399-A. The kits include a fan bracket that lets you strap a 40 mm fan onto your CPU VRM heatsink, and a so-called "SoC heatsink," designed to cool the SoC power phase MOSFETs (which now have to cope with the load of four SoC dies). The kit for the Zenith Extreme also includes a 10 mm-thick 40 mm fan, which plugs into one of your 4-pin PWM headers. The kit will neither be included with current or upcoming inventories of unsold X399 motherboards by ASUS. Customers who need it will have to contact their local ASUS office, which will verify the purchase of their ASUS X399 motherboard, and ship their kit for free.

So, maybe it isn't really working - but at least the system boots up all the way to the BIOS memory checks, where it then stops emitting life signs. Der8auer went through a sort of blind process to discover that there is a particular ID pin on EPYC that when covered, allows the CPU to be booted up by a X399 motherboard (in this case, an ASUS X399 Zenith Extreme). ID pins are nothing new, and basically tell sockets whether or not they should be powering up a particular CPU.

So what exactly does this mean? Nothing much - only that the sockets and pinouts are the same. The approach towards detecting the ID pin was a crude, brute force one, appending a piece of electrical tape to different parts of the CPU, narrowing down the search for a single pin. When this particular pin was covered, standby power finally kept on, and the motherboard ran through some initial boot steps until stopping at the D0 memory boot code. Der8auer thinks that a "simple" BIOS switch on this TR4 motherboard to an EPYC motherboard's BIOS would suffice to get the EPYC CPU running on this Threadripper motherboard. Check out the full video after the break.