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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  • R3MF - Thursday, June 8, 2017 - link

    "AMD has engineered the CPU to have 60 PCIe lanes for storage"

    We know that Ryzen has 24x PCIe 3.0 lanes:
    16x for GPU
    4x for NVMe M.2
    4x for chipset

    And that threadripper is two Ryzens on a single PCB.

    Explain the disparity?

    Does this imply that Ryzen actually has 32x PCIe 3.0 lanes to play with, but that Socket AM4 only exposes 24 of them?

    This would suggest that threadripper has:
    60x for GPU_Other IO
    4x for chipset

    Is that likely?
  • ddriver - Thursday, June 8, 2017 - link

    Ryzen actually has 32 pci-e lanes in hardware. How much of those are available for use is a different subject.
  • R3MF - Thursday, June 8, 2017 - link

    aha, thought this might be the case.
  • SaturnusDK - Thursday, June 8, 2017 - link

    Surprising so few comments there are on the fantastic potential of this platform. With it's feature set and the CPUs coming for it, it is basically a direct replacement for a single core Xeon workstation platform. 48 PCIe 3.0 lanes dedicated to main PCie slots alone. Compare that to the maximum of 44 PCIe lanes total on the upcoming X299 platofrm for the Intel -X series and you can clearly see AMD isn't just aiming at the HEDT market but also the low-end workstation market. It's going to send shock waves through that market as that has pretty much always been dominated by Intel where their monopoly really reared it's ugly head as they commonly charge up to and above $9000 for their top range models. Remember that all Ryzen CPUs support ECC DDR4 RAM as well. It's not artificially disabled as on Intel CPUs and it comes with NVMe m.2 RAID capability right out of the box. Something you'll have to pay extra to get enabled on the X299 platform.

    All in all, Threadripper and the x399 is a comprehensive knock out blow to Intel. It'll be interesting if and when they will have an answer to AMDs performance lead.
  • ddriver - Friday, June 9, 2017 - link

    AMD is aiming VERY MUCH high end workstation, at least for a single socket config.
  • vred - Saturday, June 10, 2017 - link

    "Single core"? I don't think this means what you think this means.
  • BenJeremy - Monday, August 7, 2017 - link

    Where did you hear X399 supported NVMe RAID? I did a little digging, and apparently "not yet" is the answer. Another site mentions that AMD is supposed to enable this in the future, but no ETA.
  • SpetsnazAntiVIP - Sunday, June 11, 2017 - link

    Call me crazy, but I think workstation boards should include ipmi with virtual console.
  • BenJeremy - Monday, August 7, 2017 - link

    Intel X299 vs AMD X399

    Kind of funny that AMD stepped in and stole Intel's next chipset name, but also a bit confusing as well.

    No mention of RAID capabilities? I'd love to see AMD offer "free" RAID utilizing all those PCI-e lanes and smack Intel up side of their collective heads for pushing that VROC nonsense on their customers.

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