Question 1

I know this sounds dumb but can I use DDR3 ram on this board?  Just trying to save a little with upgrading.  I know its not a good long term idea but for a short term. I have 32gigs of DDR3 currently.

Accepted Answer

No, this board only supports DDR4 memory. Attempting to jam DDR3 in there won't work as the slots are sized differently.

Question 2

I made a system with this MB with Treadripper 1950 and Corsair H105 liquid cooling. Right after I made the whole system,  I updated the BIOS to version 2.0.

My issue is CPU temperature. The BIOS indicates CPU temp reaches 60 deg C while it is idling. I changed liquid cooling to another brand and tried. But it says the same thing, high temp like 50-60 deg C. Is this temperature normal with Treadripper or something I did wrong? I'd appreciate your advice.

Accepted Answer

Temps on idle shouldn't be more than 35-36C. That said please check the idle temps once you boot the OS, Windows or Linux whichever you use. Most of the times BIOS temps are high as power management hasn't kicked in. In case the Temps are high in Windows as well, then most likely its an issue with the thermal paste application. the thermal paste on the threadripper needs to be spread out.

Question 3

Is the only reason to buy this over the similar ASRock Taichi model the 10gbps LAN?  $100 extra seems steep given the selection of ~$25-50 PCIe 10gbps NICs available on Newegg.

Accepted Answer

ignore the 10gb NIC... you dont have internet service that fast and you will never saturate a 1Gb NIC gaming. If you are mounting iSCSI targets or building a server, fine. But if this is going to be your gaming rig that NIC port is worthless. And, even if you were mounting network drives such as iSCSi you would need a dedicated port anyway. Anyone who thinks that port serves a purpose on a gaming rig is believing nothing more than marketing hype. My SAN array does not even saturate the 10Gb port being used, and I have a 3 node VMWare cluster running off from it.

Question 4

Is the supported RAM truly 128GB or could it go to 256GB with 32GB DIMMs x 8? I believe threadripper itself can handle more RAM it's a matter of DIMM capacity and slot count. Yet want to make sure this Mobo itself could handle 256GB RAM, anyone tried??

Accepted Answer

I don't know anyone that has tried to do that. This MoBo came out at TR launch and I believe 16GB is the max per slot. I would look at any TR4 MoBos that were released later first if that is your goal.

Also be sure to check the RAM compatibility list for the specific RAM you are using. TR and Ryzen both have a lot of issues with RAM that is not compatible.

Hope this helps!

Question 5

I run Sapphire video cards and the x470 gaming k4 I have now cuts the pcie 16x to 8x when in crossfire. Does this board do the same or can I run 2 at 16x 3.0?

Accepted Answer

Per the manual, if only running two cards in crossfire, PCIE1 and PCIE4 can be used for 16x in both slots for dual CrossfireX. Don't have AMD graphics to confirm, but that's what the manual says

Question 6

Has anyone installed 128 GB of DDR4 memory and would I expect to have any problems doing that?  And is there anything specific about memory I should look for when installing that much?

Accepted Answer

You should look at the QVL for the memory you're intending to purchase and/or the motherboard itself; there are a lot of 16GB DIMMs on Asrock's QVL for this board, so 128GB should work OK.

Question 7

What's the best memory to use with this MB for gaming that's on the memory QVL?

Accepted Answer

I doubt anyone has enough examples of memory on this platform to answer your question. X399 is a pretty poor platform for gaming though.

Question 8

It says it has a TPM header. Like the one on my Intel X99 Workstation?

Accepted Answer

The motherboard does have a 17-pin TPM header. But I cannot get it working. I tried both ASRock TPM module 1.2 and 2.0. Neither works. ASRock doesn't mention the TPM header in the user manual. So be careful that it might not be supported officially (or might not be supported at all). AMD's fTPM implementation has some flaw as of this writing. There will likely be a firmware update to patch the flaw. And that's why I wanted to get separate TPM module working. But sadly it might not be possible.

Brand	ASRock
Series	Fatal1ty
Model	X399 Professional Gaming

CPU Socket Type	sTR4
CPU Type	Ryzen Threadripper 1st Gen / Ryzen Threadripper 2nd Gen

Number of Memory Slots	8x288pin (DDR4)
Memory Standard	DDR4 3600+(OC)/ 3200(OC)/ 2933(OC)/ 2667/ 2400/ 2133
Maximum Memory Supported	128GB* *Due to the operating system limitation, the actual memory size may be less than 4GB for the reservation for system usage under Windows 32-bit OS. For Windows 64-bit OS with 64-bit CPU, there is no such limitation.
Channel Supported	Quad Channel

PCI Express 3.0 x16	4 x PCI Express 3.0 x16 Slots (PCIE1/PCIE2/PCIE4/PCIE5: single at x16 (PCIE1); dual at x16 (PCIE1) / x16 (PCIE4); triple at x16 (PCIE1) / x8 (PCIE2) / x16 (PCIE4); quad at x16 (PCIE1) / x8 (PCIE2) / x16 (PCIE4) / x8 (PCIE5))* * Supports NVMe SSD as boot disks
PCI Express x1	1 x PCI Express 2.0 x1 Slot
Other Slots	1 x Vertical M.2 Socket (Key E) with the bundled Wi-Fi 802.11 ac module (on the rear I/O) 15µ Gold Contact in VGA PCIe Slot (PCIE1 and PCIE4)

Serial ATA (SATA)	8 x SATA3 6.0Gb/s Connectors, support RAID, NCQ, AHCI and Hot Plug
M.2	2 x Ultra M.2 Sockets (M2_1 and M2_2), support M Key type 2242/2260/2280 M.2 SATA3 6.0Gb/s module and M.2 PCI Express module up to Gen3 x4 (32Gb/s)* 1 x Ultra M.2 Socket (M2_3), supports M Key type 2230/2242/2260/2280 M.2 SATA3 6.0Gb/s module and M.2 PCI Express module up to Gen3 x4 (32Gb/s)* * Supports NVMe SSD as boot disks * Supports ASRock U.2 Kit 1 x U.2 Connector * If U.2 Connector is plugged, M2_1 will be disabled
SATA RAID	0/1/10

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ASRock Fatal1ty X399 Professional Gaming sTR4 AMD X399 ATX AMD Motherboard

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LAN Chipset	AQUANTIA AQC107
Second LAN Chipset	2 x Intel I211AT
Max LAN Speed	10Gbps + 2 x 1Gbps
Wireless LAN	Intel 802.11 ac Wi-Fi Module (Free Bundle) Supports IEEE 802.11 a/b/g/n/ac Supports Dual-Band (2.4/5 GHz) Supports high speed wireless connections up to 433 Mbps
Bluetooth	Supports Bluetooth 4.2 / 3.0 + High speed class II

Onboard USB	2 x USB 2.0 Headers (Support 4 USB 2.0 ports) (Supports ESD Protection) 2 x USB 3.1 Gen1 Headers (Support 4 USB 3.1 Gen1 ports) (Supports ESD Protection)
Other Connectors	1 x COM Port Header 1 x Power LED and Speaker Header 2 x RGB LED Headers* 1 x CPU Fan Connector (4-pin) 1 x CPU Optional/Water Pump Fan Connector (4-pin) (Smart Fan Speed Control)* 2 x Chassis Fan Connectors (4-pin) (Smart Fan Speed Control) 1 x Chassis Optional/Water Pump Fan Connector (4-pin) (Smart Fan Speed Control)** 1 x Front Panel Audio Connector (15µ Gold Audio Connector)* 1 x Right Angle Front Panel Audio Connector*** 1 x Clear CMOS Switch 1 x Dr. Debug with LED 1 x Power Switch with LED 1 x Reset Switch with LED 1 x CPU Xtreme OC Switch * Each header supports up to 12V/3A, 36W LED Strip. The CPU Fan Connector supports the CPU fan of maximum 1A (12W) fan power. * The CPU Optional/Water Pump Fan supports the water cooler fan of maximum 1.5A (18W) fan power. ** The Chassis Optional/Water Pump Fan supports the water cooler fan of maximum 1.5A (18W) fan power. CPU_FAN1, CHA_FAN1, CHA_FAN2, CPU_OPT/W_PUMP and CHA_FAN3/W_PUMP can auto detect if 3-pin or 4-pin fan is in use. **** Connect the audio device to either one of the audio connectors.

Form Factor	ATX
LED Lighting	RGB
Dimensions (W x L)	12.0" x 9.6"
Power Pin	1 x 24-pin ATX Power Connector (Hi-Density Power Connector) (for Motherboard) 1 x 8-pin 12V Power Connector (Hi-Density Power Connector) (for Motherboard) 1 x 4-pin 12V Power Connector (Hi-Density Power Connector) (for Motherboard) 1 x 6-pin 12V Power Connector (Hi-Density Power Connector) (for PCIe graphics card)

Onboard Audio
Audio Chipset	Realtek ALC1220
Audio Channels	7.1 Channels

Item#: 9SIA639KXR4538