Asus X99-E WS/USB3.1, Workstation, Intel X99, 2011-3, CEB, DDR4, Dual GB LAN, XFire/SLI, RAID, USB 3.1

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4-way graphic power with ultra-fast USB 3.1 onboard
  • Quad Strength Graphic Power – 4-Way PCI-E Gen3 x16 link supporting NVidia GeForce SLI and AMD CrossFireX on demand
  • Supreme Power Solution – Premium components deliver industry-leading power efficiency
  • 5-Way Optimization by Dual Intelligent Processors 5 – One click, total system optimization
  • Superb storage flexibility– onboard M.2 x4 and support for both ASUS PIKE II and ThunderboltEX II cards
  • Easy maintenance–ASUS Q-Code Logger, an easy-maintenance button and Dr. Power LED displays unusual power statuses
  • The latest 10Gb/s USB 3.1 built into the board-twice as fast USB 3.0



Workstation Exclusive
Quad Strength Graphic Power
The Intel X99 chipset-based workstation motherboard features on-demand NVIDIA® GeForce® SLI™ and AMD CrossFireX™ technology, plus hassle-free troubleshooting features for minimized downtime.
Four PCI Express 3.0 x16 slots enable extreme graphics power
The X99-E WS can carry up to four dual-slot graphics. It supports 4-Way NVIDIA® Geforce® SLI™ and AMD CrossFireX™ x 16 Link, making it an excellent choice for graphics professionals who depend on powerful graphics in areas such as design and modeling, medical research, plus processing-intensive simulation and rendering applications. In addition to graphics cards, extensive X99-E WS expandability offers ample room for RAID cards, PCI Express-based solid state storage drives, video capture cards, and other components.
Supreme Power Solutions
ASUS X99-E WS/USB 3.1 couples innovative thinking with premium components to deliver industry-leading power efficiency.
Carefully engineered with Beat Thermal Chokes made of highly conductive and efficient gold-treated coating for minimal-loss power delivery and integrated Dr.MOS MOSFET that both saves space and reduces operating temperatures. For the latest workstation motherboard, ASUS introduce the industry's most durable 12K solid capacitors, and exclusive ASUS ProCool power connectors. X99-E WS/USB 3.1 is built to stay cool under pressure — and boosts performance, power efficiency and product longevity into extreme levels!
12K hour caps - Capacitors with World's Best Longevity
ASUS is the world's first motherboard manufacturer to introduce 12K solid capacitors, and X99-E WS/USB 3.1 is of course equipped. These Japanese-made capacitors are the most durable in the industry, able to endure up to 12K hours at 105 °C and 1.2M hours at 65 °C. This is far higher than the temperatures generated by everyday computing, so X99-E WS/USB 3.1 is built for endurance . Our 12k capacitors also boast lowered equivalent series resistance (ESR) for increased efficiency and minimized heat generation — improving overall performance!



Easy Maintenance
Q-Code Logger – one-touch status checker
Q-code logger is your one-touch status checker that lets users easily check system status at any time. Plug a flash drive into adjacent USB port, press the motherboard's dedicated Q-Code logger button and all ASUS Q-Code event logs for the current live session will be copied to the drive even with the system off.
ASUS Dr. Power hassle-free power supply health monitoring
As the X99-E WS/USB 3.1 is meant for professional users who rely on non-stop operation, stable power delivery is critical. Real time power supply health detection helps prevent sudden system shutdown and provides hassle-free notifications should power delivery be insufficient. Additionally, LED messages on the board clearly indicate any relevant power issues in the event your system fails to boot.


Flagship performance
Drive 8-core CPU and DDR4 performance beyond all expectations!
ASUS Exclusive OC Socket
The X99-E WS/USB 3.1' CPU socket includes extra pins that connect proprietary circuitry to extra contacts found on Haswell-E's land grid array (LGA). When combined with our customized UEFI, this exclusive feature offers comprehensively-improved overclocking margins, especially under extreme liquid-nitrogen (LN2) overclocking. You'll enjoy better margins for memory overclocking, better comparative memory performance under the same frequencies, and better margins for CPU overclocking with minimal voltage drop — so you're able to push the latest processors and DDR4 memory beyond their limits! OC Socket is 100% compatible with the new Haswell-E LGA 2011-3 processors. Forget limits, break every performance barrier with OC Socket!
Make your memory go faster
This is the first platform to support DDR4 memory, and it is capable of overclocking memory up to DDR4 3200+ MHz with all eight DIMMs fully loaded! ASUS-exclusive T-Topology circuit design plus patent-pending OC Socket unleash the full potential of DDR4 by minimizing crosstalk and signal reflections. Thanks to our expertise in motherboard layout design, signal timing issues are also greatly reduced, resulting in improved stability and overall performance. ASUS works with almost every DDR4 memory vendor to ensure the best compatibility – so you're assured reliable performance from your favorite brands.
One click overclock and cooling, done!
Get performance, efficiency, digital power, fan control and even networking and audio tuning tailored for you
One click takes care of all that complex tuning. Your PC is smart with ASUS 5-Way Optimization. It dynamically optimizes essential aspects of your system based on real-time use – so you get superb CPU performance, everyday energy savings, ultra-stable digital power, cool and quiet fans and now even networking and audio settings that are tailored for the apps that you are using. In short, 5-Way Optimization ensures that your PC is perfect for gaming, entertainment, productivity or just about anything else!
  • Games run swiftly and smoothly with highest performance, prioritized bandwidth and crystal-clear sound.
  • Fans stay whisper-quiet for everyday computing and ensure extreme cooling efficiency when gaming.
  • Never-stutter in professional apps and heavy loading.
  • Energy waste is reduced so you'll save money.
Fan Xpert 3
Fan Xpert 3 puts 4-pin/3-pin CPU and case fan controls in one place. It scans each fan's characteristics and delivers custom settings for each fan based on the dedicated area temperatures detected by hardware thermal sensors. Make sure every fan achieves the best balance of cooling performance and low noise. Fan Xpert 3 supports hardware-level PWM/DC combo mode for both the CPU and case fans. It even can  reduce the CPU fan speed to below the default minimum, for extra-quiet and power saving operation during light loads.


Media-acclaimed UEFI BIOS
The smoothest, slickest mouse-controlled graphical BIOS has been improved to make it even more appealing. Whether you're a PC novice or a seasoned overclocker, the EZ and Advanced Modes help you find your way, quickly and easily.
Map to MyFavorite:
Quickly find tuning options and add preferred tools to the MyFavorites list!
EZ Tuning Wizard – OC and RAID:
Select your hardware and use scenarios to tune system performance or streamline your RAID configuration for faster data retrieval and backups!
Improve your DRAM performance with a click!



  • Motherboard Type: Server / Workstation
  • Form Factor: CEB
  • Socket: 2011-v3
  • Chipset: Intel X99
  • #Hide#DDR Type: DDR4
  • RAM Technology: DDR4 (Quad Channel)
  • RAM Slots: 8 x DIMM
  • RAM Speeds: 3200(O.C.)/3000(O.C.)/2800(O.C.)/2666(O.C.)/2400(O.C.)/2133 MHz
    & 1866 with Xeon E5-1600 v3/2600 v3 CPUs
  • Maximum Memory: 128GB
  • Graphics: -
  • Graphics Ports: -
  • Multi-GPU Support: Supports NVIDIA 4-Way SLI Technology
    Supports AMD 4-Way CrossFireX Technology
  • PCI Express: 7 x PCIe 3.0/2.0 x16
  • PCI: -
  • Storage: 8 x SATA III
    2 x SATA Express
    1 x M.2 x4 Socket 3
    2 x eSATA 6Gb/s
  • RAID: "RAID 0, 1, 5, 10 and Intel Rapid Storage Technology 13"
  • Wireless: -
  • LAN: Dual GB LAN
  • Audio: Realtek ALC1150 8-Channel High Definition Audio CODEC featuring Crystal Sound 2
  • USB Ports Supported: "2 x USB 3.1 (at back)
    12 x USB 3.0 ports (8 at back, 4 at mid-board)
    4 x USB 2.0 ports (at mid-board)"
  • Back Panel I/O Ports: 2 x eSATA
    2 x LAN (RJ45)
    2 x USB 3.1
    8 x USB 3.0
    1 x Optical S/PDIF out
    8 x Audio jacks
    1 x USB BIOS Flashback Button
    1 x Q-Code Logger button
  • Internal I/O Connectors: 2 x USB 3.0 connectors
    2 x USB 2.0 connectors
    2 x SATA Express
    1 x M.2 Socket 3
    1 x TPM
    8 x SATA 6Gb/s
    1 x CPU Fan
    1 x CPU OPT Fan
    4 x Chassis Fan
    1 x S/PDIF out
    1 x Thunderbolt
    2 x 8-pin EATX 12 V
  • .: "1 x 6-pin EATX 12 V_1
    1 x 24-pin EATX
    1 x 8-pin ATX 12V
    1 x Front panel
    1 x System panel
    1 x DRCT
    1 x Thermal sensor
    1 x CPU/DRAM overvoltage
    1 x 3-pin CHASSIS
    Buttons: MemOK!, Power-on, Reset, Clear CMOS
    Switches: EZ XMP, TPU, Dr.Power"
  • CPU Support: Click here for CPU support
  • Accessories: Users manual
    ASUS Q-Shield
    1 x COM port cable
    12 x SATA 6Gb/s cables
    1 x 3-Way SLI bridge
    1 x 4-Way SLI bridge
    1 x Q-connector
    1 x 2-port USB 2.0 modules
  • Additional Features: See Overview
  • Package Type: Retail
  • Package Weight: 1.9200 kg
  • Warranty: 3 Years

Data sheet

"1 x 6-pin EATX 12 V_1, 1 x 24-pin EATX, 1 x 8-pin ATX 12V, 1 x Front panel, 1 x System panel, 1 x DRCT, 1 x Thermal sensor, 1 x CPU/DRAM overvoltage, 1 x 3-pin CHASSIS, Buttons
PCI Express
7 x PCIe 3.0/2.0 x16
RAM Speeds
3200(O.C.)/3000(O.C.)/2800(O.C.)/2666(O.C.)/2400(O.C.)/2133 MHz, & 1866 with Xeon E5-1600 v3/2600 v3 CPUs
Users manual, ASUS Q-Shield, 1 x COM port cable, 12 x SATA 6Gb/s cables, 1 x 3-Way SLI bridge, 1 x 4-Way SLI bridge, 1 x Q-connector, 1 x 2-port USB 2.0 modules
USB Ports Supported
"2 x USB 3.1 (at back), 12 x USB 3.0 ports (8 at back, 4 at mid-board), 4 x USB 2.0 ports (at mid-board)"
8 x SATA III, 2 x SATA Express, 1 x M.2 x4 Socket 3, 2 x eSATA 6Gb/s
"RAID 0, 1, 5, 10 and Intel Rapid Storage Technology 13"
3 Years
Motherboard Type
Server / Workstation
Form Factor
Intel X99
DDR Type
RAM Technology
DDR4 (Quad Channel)
RAM Slots
8 x DIMM
Maximum Memory
Multi-GPU Support
Supports NVIDIA 4-Way SLI Technology , Supports AMD 4-Way CrossFireX Technology
Realtek ALC1150 8-Channel High Definition Audio CODEC featuring Crystal Sound 2
Back Panel I/O Ports
2 x eSATA, 2 x LAN (RJ45), 2 x USB 3.1, 8 x USB 3.0, 1 x Optical S/PDIF out, 8 x Audio jacks, 1 x USB BIOS Flashback Button, 1 x Q-Code Logger button
Internal I/O Connectors
2 x USB 3.0 connectors, 2 x USB 2.0 connectors, 2 x SATA Express, 1 x M.2 Socket 3, 1 x TPM, 8 x SATA 6Gb/s, 1 x CPU Fan, 1 x CPU OPT Fan, 4 x Chassis Fan, 1 x S/PDIF out, 1 x Thunderbolt, 2 x 8-pin EATX 12 V
CPU Support
See manufacturers link (next to product images)
Package Type
Package Weight
1.9200 kg
Graphics Ports
Additional Features
See Overview