Over 25 years of award-winning motherboard engineering experience delivers the perfect balance of performance and power – introducing the first X399 Series of motherboards by ASUS and ROG.

Designed to optimize AMD's Ryzen Threadripper CPU, the X399 Series is built with the features and connectivity that enthusiasts, power users, and creative professionals desire in the ultimate DIY computing experience.

Shred the competition with the X399 motherboards from ASUS and the Republic of Gamers.

Synchronize RGB LEDs and lighting effects across Aura Sync-enabled hardware and accessories to create dazzling themes in perfect harmony.

Visit the ASUS Aura Sync website to learn more about AURA SYNC.

Personalize your build with eye-catching designs and improve performance with ASUS — the first motherboard brand to introduce a dedicated mount to support 3D-printed parts.

ROG Zenith Extreme
The Choice of Champions

Shred the Competition

Use 5-Way Optimization and Auto Tuning to create overclocking profiles tailored to your unique build, delivering 1-click overclocking and dynamic system cooling for maximum OC performance. Additional features like Water Cooling Zone with Thermal Sensors, AIO pump header, and Fan Extension Card allow you to dynamically tune your system cooling to the perfect setting for every occasion.

Ultimate Gaming Connectivity

The ROG Zenith Extreme gives users connectivity for every tool in their digital toolbox. Content creators and gamers will appreciate the onboard 802.11AD WiGig WiFi, perfect for moving large files and the future of wireless VR. USB 3.1 Gen 2, NVMe M.2, a U.2 port, and Intel® Gigabit LAN provide the resources needed to bring imagination to life.

Combine all of these premium features with the included ROG Aerion 10G networking expansion card and online gaming will never be the same again.

Prime X399-A
Primed to Outclass

Prime Time Performance

Known for its Arctic White highlights, the Prime series motherboards combine beauty and power to deliver a first-class experience. The addition of 3D Printing Mounts allows you to customize your look even further with a library of aesthetic and performance enhancing parts.

Use 5-Way Optimization and Auto Tuning to create overclocking profiles tailored to your unique build, delivering 1-click overclocking and dynamic system cooling for maximum OC performance.

Focused Audio

Whether it's the premium sound from Prime's Realtek S1220A shielded audio codec with Crystal Sound 3, the warm-tones from Japanese audio capacitors, immersive 3D surround-sound with DTS Headphone:X, or internal audio amplifier (OP AMP) for a wider soundstage, the Prime X399-A keeps you in the mix with flawless audio performance.

Model ROG Zenith Extreme PRIME X399-A
CPU AMD® TR4 socket for AMD® Ryzen™ Threadripper™ Processors
Chipset X399
Memory 8X DIMM max, 128GB DDR4, 3200+MHz (OC)
PCIe Slots 4x PCIe 3.0 x16 SafeSlots (supports quad @ x16/x8/x16/x8)
1x PCIe 2.0 x4
1x PCIe 2.0 x1
4x PCIe 3.0 x16 SafeSlots x3 (supports triple @ x16/x16/x8)
1x PCIe 2.0 x4
1x PCIe 2.0 x1
Multi-GPU Supports AMD® 4-Way/3-Way/Quad-GPU CrossFireX™ Technology
Supports NVIDIA® 4-Way/3-Way/Quad-GPU SLI™ Technology
Supports AMD® 3-Way/2-Way/Quad-GPU CrossFireX™ Technology
Supports NVIDIA® 3-Way/2-Way/Quad-GPU SLI™ Technology
Graphics No
Audio SupremeFX S1220 8-Channel High Definition Audio CODEC
with ES9018Q2C High Definition DAC
Realtek® S1220A 8-Channel High Definition
Audio CODEC Featuring Crystal Sound 3
Networking ROG Aerion 10G Ethernet Card Intel® I211-AT Gigabit LAN controller Intel® I211AT Gigabit LAN
Wireless/ Bluetooth 802.11AD WiGig WiFi
802.11AC MU-MIMO
Bluetooth v4.1
SATA 6Gb/s 6
NVMe M.2 32Gb/s 2x M.2 Vertically Mounted with DIMM.2 Adapter
1x On-Board M.2
1x M.2_1 Socket 3 M Key 2242/2260/2280
1x M.2_2 Socket 3 Vertical M Key 2242/2260/2280/22110
U.2 Support Yes
USB 3.1 Front Panel Connector Yes
USB 1x USB 3.1 Gen 2 Type A
1x USB 3.1 Gen 2 Type C
12x USB 3.1 Gen 1
2x USB 2.0
2x USB 3.1 Gen 2 Type A
12x USB 3.1 Gen 1
4x USB 2.0
Aura Sync RGB Lighting Yes, X399 Motherboards Are AURA Sync Enabled
4-Pin RGB Header 2x RGB Header
1X Addressable Header
2x RGB Header
SafeSlot 4 3
3D Printing Mounts No Yes
Form Factor EATX

© ASUSTeK Computer Inc. All Rights Reserved. Terms of Use. All specifications are subject to change without notice and features are only in select models. Products may not be available in all markets. Purchase of ASUS ThunderboltEX 3 Card to enable Thunderbolt functionality.
All prices reflect the final price after savings/rebate(s).

Promotion Has Expired

We're sorry. This promotion has ended, but we have many more deals and bargains at!

Earn big savings every day with Daily Deals and steal hot products at rock bottom prices with Shell Shockers!

Never miss your chance for big savings again by signing up for the Newegg Newsletter!