ASUS X399-A

AMD SocketTR4 for AMD Ryzen™ Threadripper™ Processors
* Refer to  for CPU support list

AMD X399

AMD Ryzen™ Threadripper™ Processors
8 x DIMM, Max. 128GB, DDR4 3600(O.C.)/3466(O.C.)/3333(O.C.)/3200(O.C.)/3000(O.C.)/2800(O.C.)/2666/2400/2133 MHz ECC and non-ECC, Un-buffered Memory
* Refer to for the Memory QVL (Qualified Vendors Lists).

Supports NVIDIA® Quad-GPU SLI™ Technology
Supports NVIDIA® 3-Way SLI™ Technology
Supports NVIDIA® 2-Way SLI™ Technology
Supports AMD Quad-GPU CrossFireX™ Technology
Supports AMD 3-Way CrossFireX™ Technology
Supports AMD 2-Way CrossFireX Technology

AMD Ryzen™ Threadripper™ Processors
4 x PCIe 3.0 x16 (single@x16, dual@x16/x16, triple@x16/x16/x8 mode)
AMD X399 chipset
1 x PCIe 2.0 x4 (max at x4 mode)
1 x PCIe 2.0 x1

AMD Ryzen™ Threadripper™ Processors : 
1 x M.2 Socket 3, with M key, type 2242/2260/2280 storage devices support (SATA & PCIE 3.0 x 4 mode)
1 x M.2 Socket 3, with M key, type 2242/2260/2280/22110 storage devices support (SATA & PCIE 3.0 x 4 mode)
1 x U.2 port
AMD X399 chipset : 
6 x SATA 6Gb/s port(s),
Support Raid 0, 1, 10

Intel® I211-AT
ASUS Turbo LAN Utility
ASUS LAN Guard

Realtek® ALC S1220A 8-Channel High Definition Audio CODEC featuring Crystal Sound 3
– Impedance sense for front and rear headphone outputs
– Internal audio Amplifier to enhance the highest quality sound for headphone and speakers
– Supports : Jack-detection, Multi-streaming, Front Panel Jack-retasking
– High quality 120 dB (Line-out at rear) and 113 dB SNR recording input (Line-in)
Audio Feature :
– DTS Connect
– DTS Headphone:X
– Optical S/PDIF out port(s) at back panel
– Audio Shielding: Ensures precision analog/digital separation and greatly reduced multi-lateral interference
– Dedicated audio PCB layers: Separate layers for left and right channels to guard the quality of the sensitive audio signals
– Premium Japanese-made audio capacitors: Provide warm, natural and immersive sound with exceptional clarity and fidelity
– Unique de-pop circuit: Reduces start-up popping noise to audio outputs
– EMI protection cover to prevent electrical noise to affect the amplifier quality
Separate layer for left and right track, ensuring both sound deliver equal quality

AMD Ryzen™ Threadripper™ Processors :
8 x USB 3.1 Gen 1 port(s) (8 at back panel, , Type-A)
AMD X399 chipset :
1 x USB 3.1 Gen 2 port(s) (1 at mid-board)
AMD X399 chipset :
4 x USB 3.1 Gen 1 port(s) (4 at mid-board)
AMD X399 chipset :
4 x USB 2.0 port(s) (4 at mid-board)
ASMedia® USB 3.1 Gen 2 controller :
2 x USB 3.1 Gen 2 port(s) (Type-A + USB Type-CTM)

OC Design – ASUS PRO Clock Technology
– Full BCLK range for extreme overclocking performance
ASUS Dual Intelligent Processors 5-Way Optimization by Dual Intelligent Processors 5 :
– 5-Way Optimization tuning key perfectly consolidates TPU, EPU, DIGI+ VRM, Fan Expert 4, and Turbo App
AURA :
– Aura RGB Strip Headers
– Aura Lighting Effects Synchronization with compatible ASUS ROG devices
ASUS Exclusive Features :
– USB BIOS Flashback
– AI Suite 3
– Ai Charger
– Onboard Button : Power
– ASUS UEFI BIOS EZ Mode featuring friendly graphics user interface
– Turbo LAN
– Crystal Sound 3
– PC Cleaner
ASUS Quiet Thermal Solution :
– Stylish Design Heat-pipe solution
– Stylish Fanless Design with M.2 Heat-sink solution
– ASUS Fan Xpert 4
ASUS EZ DIY :
– ASUS EZ Flash 3
– ASUS USB BIOS Flashback
– ASUS UEFI BIOS EZ Mode
– Multi-language BIOS
ASUS Q-Design :
– ASUS Q-Shield
– ASUS Q-Code
– ASUS Q-LED (CPU, DRAM, VGA, Boot Device LED)
– ASUS Q-Slot
– ASUS Q-DIMM
– ASUS Q-Connector
Gaming Aesthetics :
– 3D printing friendly
– AURA-RGB Lighting
M.2 and U.2 Onboard (The Latest Transfer Technology with up to 32Gb/s Data-transfer Speeds for M.2 and U.2)

1 x LAN (RJ45) port(s)
2 x USB 3.1 Gen 2 (teal blue)Type-A + USB Type-CTM
8 x USB 3.1 Gen 1 (blue)
1 x Optical S/PDIF out
5 x Audio jack(s)
1 x USB BIOS Flashback Button(s)

1 x 3-pin Cover fan (COV_FAN) connector
1 x Q_Code
1 x U.2 port
2 x RGB Header(s)
2 x USB 3.1 Gen 1 connector(s) support(s) additional 4 USB 3.1 Gen 1 port(s)
2 x USB 2.0 connector(s) support(s) additional 4 USB 2.0 port(s)
1 x M.2 Socket 3 with M key, type 2242/2260/2280 storage devices support (SATA & PCIE 3.0 x 4 mode)
1 x M.2 Socket 3 with M key, type 2242/2260/2280/22110 storage devices support (SATA & PCIE 3.0 x 4 mode)
6 x SATA 6Gb/s connector(s)
1 x M.2_FAN connector
1 x CPU Fan connector(s)
1 x CPU OPT Fan connector(s)
3 x Chassis Fan connector(s)
1 x AIO_PUMP connector
1 x W_PUMP+ connector
1 x 24-pin EATX Power connector(s)
1 x 8-pin ATX 12V Power connector(s)
1 x 4-pin ATX 12V Power connector(s)
1 x Front panel audio connector(s) (AAFP)
1 x System panel(s)
1 x 5-pin EXT_FAN(Extension Fan) connector
1 x Thermal sensor connector(s)
1 x Power-on button(s)
1 x Clear CMOS button(s)
1 x USB 3.1 Gen 2 front panel connector

User’s manual
ASUS Q-Shield
1 x Vertical M.2 bracket set
4 x SATA 6Gb/s cable(s)
1 x M.2 Screw Package
1 x Supporting DVD
1 x SLI HB BRIDGE(2-WAY-M)
1 x Q-Connector

128 Mb Flash ROM, UEFI AMI BIOS, PnP, WfM2.0, SM BIOS 3.0, ACPI 6.1, Multi-language BIOS, ASUS EZ Flash 3, CrashFree BIOS 3, F11 EZ Tuning Wizard, F6 Qfan Control, F3 My Favorites, Last Modified log, F12 PrintScreen and ASUS DRAM SPD (Serial Presence Detect) memory information

WfM 2.0, DMI 3.0, WOL by PME, PXE

Windows® 10 64-bit

Extended ATX Form Factor
12 inch x 10.6 inch ( 30.5 cm x 26.9 cm )