At Computex last week, ASRock demonstrated two motherboards designed for AMD’s upcoming ThreadRipper HEDT processors. The new platforms are for high-end workstations and designed to support up to four graphics cards though the 60 PCIe lanes from the CPU, over a dozen of storage devices and up to eight DIMMs. To a large degree, ASRock’s motherboards reflect overall positioning of the AMD X399 “ThreadRipper” platform as a premium high-end desktop play, and what to generally expect from makers of mainboards here.

ASRock plans to offer two motherboards for AMD’s ThreadRipper CPUs: the X399 Professional Gaming and the X399 Taichi. The mainboards are based on the same PCB (and the same AMD X399 chipset/socket), but have a slightly different feature set. The ThreadRipper motherboards that ASRock demonstrated at Computex featured an eight-phase digital CPU VRM, which is the feasible limit given the physical space available, but we have no idea the capabilities of the power delivery as of yet. ThreadRipper is meant to be a high performance, high power processor, so undoubtedly the motherboard vendors have built their boards to match. When it comes to the socket itself, it has 4094 pins and is very large (not surprising given its origin). We've seen the socket referred to as SP3r2 and TR4, although the official word from AMD is that it is the 'X399 platform'.

It will be interesting to see whether any motherboard maker manages to design a Mini-ITX mainboard for the ThreadRipper, but we will see. As we understand it, one of the problems with the socket, apart from the dimensions, is its cost to manufacturers that is prohibitively high at this time.

Both of the X399 motherboards from ASRock have eight DDR4 memory slots, but the manufacturer does not disclose speeds, ECC support and other details (although given previous discussions, we expect at least ECC and DDR4-2400). In fact, it does not even reveal the maximum amount of memory supported by the CPU. Though even if the company does know, it's almost certain that AMD wants to hold all of these cards close to their chest for future product announcements.

The X399 Professional Gaming physically has four PCIe 3.0 x16 slots (electrically set at two x16 and two x8) that can support up to four-way AMD CrossFireX or NVIDIA SLI multi-GPU configurations, as well as PCIe SSDs. In addition, there is a PCIe 3.0 x1 slot. As for storage options, ASRock has most configurations covered: the motherboard carries eight SATA ports, a U.2 connector, as well as three M.2 slots. To ensure that there is enough power for the latter, there is a 6-pin PCIe power connector right near the SATA ports. As for network connectivity, the motherboard features a 10 GbE port using Aquantia's AQC solution, two GbE headers (enabled by Intel controllers), as well as a 2x2 802.11 Wi-Fi module with Bluetooth. As for USB, there are 10 USB 3.0 ports in addition to two USB 3.1 ports (Type-A and Type-C) on the back panel. Finally, the X399 Professional Gaming has a 7.1 audio sub-system enhanced using Creative Labs’ SoundBlaster software.

ASRock's X399 Professional Gaming and X399 Taichi for AMD ThreadRipper CPUs
  X399 Professional Gaming X399 Taichi
CPU Support AMD ThreadRipper CPUs in LGA4094 form-factor

4 × PCIe 3.0 x16 (2 × x16, 2 × x8)
4-way AMD CrossFireX and NVIDIA SLI supported

Chipset AMD X399
Memory Eight DDR4 DIMM slots
Ethernet 1 × 10 GbE Aquantia AQtion AQC107
2 × Intel GbE controllers
2 × Intel GbE controllers
Storage 8 × SATA 6 Gbps
3 × M.2 (PCIe 3.0 x4 or SATA)
1 × U.2 (PCIe 3.0 x4)
Audio Realtek ALC1220 (?)
7.1 channel audio with Creative Labs SoundBlaster Cinema 3 enhancements
Realtek ALC1220 (?)
7.1 channel audio with ASRock Purity Sound 4
USB 8 × USB 3.0 Type-A
1 × USB 3.1 (Gen 2) Type-A
1 × USB 3.1 (Gen 2) Type-C
Other I/O Dual band 802.11ac Wi-Fi + Bluetooth 4.x, PS/2
Form-Factor ATX
MSRP Expensive Less Expensive

It is worth nothing that we expect the X399 chipset to be as capable as the AM4 X370 platform, which means that some of the features on the motherboard are likely to have shared resources, meaning having one enabled will disable some others. AMD has engineered the CPU to have 60 PCIe lanes for storage and graphics, which will nominally mean most configurations will allow three GPUs (totalling 48 lanes) and three M.2 slots (totalling 12 lanes) although the 10GbE controller will require some lanes as well as the other Ethernet and perhaps a USB port controller or two. Until we see the chipset diagram, it will be hard to tell at this point.

The ASRock X399 Professional Gaming and the X399 Taichi will be available later this year when AMD releases its ThreadRipper CPUs. It goes without saying that the motherboards are not going to be cheap: they are not designed for general consumers and their server origin will have a direct impact on pricing.

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Source: ASRock

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  • jordanclock - Wednesday, June 7, 2017 - link

    Anyone else find it a little funny that the second biggest logo on the Taichi is an Intel one and not a single AMD logo is to be seen?
  • Gothmoth - Wednesday, June 7, 2017 - link

    i wonder more why only 2 boards from asrock.

    with intel it seems they make a complete new board for every single feature they enable.....
  • Chaitanya - Wednesday, June 7, 2017 - link

    Thats because this platform is scheduled to be released in August, while Intel Core-X is releasing coming few weeks. We will see more boards from all manufacturers closer to launch. Right now these boards were just shown off to press to let people should expect from new platform.
  • Vatharian - Wednesday, June 7, 2017 - link

    Because Intel's platform is evolving one, and is generally known among engineers. They are familiar with Intel's design standards and with every generation, they just read updates. Now, this platform is something totally new, that came out of the blue. This means new design from scratch, high cost and many iterations, while ironing kinks and going back and forth with AMD. They even decided to use same PCB, which is very good decision in this case.

    Demand for platform is a big unknown - as soon as it starts flying off the shelves, next iterations of the boards, with different feature set will start to show, basically as soon as these new designs we see now will pay for themselves.
  • CajunArson - Wednesday, June 7, 2017 - link

    Considering the crap-quality ethernet controllers that often get shoved onto these boards, I'd be loudly advertising Intel Gig-E hardware too as a sign that this board should be taken seriously.
  • Vatharian - Wednesday, June 7, 2017 - link

    Why it would be otherwise? Has AMD actually made even single component that's actually on the board, as it is shipped?

    Also, fun fact: I have both AM3 motherboard that uses Intel's Pentium S478 cooler, and Intel's Socket 771 motherboard, that has mounting (and a cooler) from AMD, in this case from S939.
  • prisonerX - Wednesday, June 7, 2017 - link

    Do you mean like the chipset? Pretty minor, I know.
  • Gasaraki88 - Thursday, June 8, 2017 - link

    The chipset is actually made by ASMedia.
  • TheinsanegamerN - Friday, June 9, 2017 - link

    chipset is from ASmedia, network controller from intel, realtek, or atheros, ece.

    AMD doesnt make any of it's chipset features, which is arguably their biggest weakness right now vs intel
  • ddriver - Tuesday, October 3, 2017 - link

    Everything important is integrated in the CPU. The "chipset" is very, very peripheral. Even most SATA comes directly from the CPU. So in a way amd makes most of the stuff that matters.

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