ASUS X99-A/USB 3.1 Motherboard

ASUS X99-A/USB 3.1 Motherboard

ASUS X99-A/USB 3.1 Motherboard

B&H # ASX99AUSB31 MFR # X99-A/USB 3.1
No Longer Available

Product Highlights

  • ATX Form Factor
  • Intel LGA2011-v3 Socket
  • Intel X99 Chipset
  • Supports Intel Core i7 Processors
  • Supports DDR4-3300 (OC) Memory
  • USB 3.1 Connectivity
  • 3 x PCIe 3.0/2.0 x16 Slots
  • 1x PCIe 2.0 x16 / 2x PCIe 2.0 x1 Slots
  • Intel I218V Gigabit LAN Controller
  • Supports RAID 0, 1, 5, 10
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ASUS X99-A overview

  • 1Description

The X99-A/USB 3.1 Motherboard from ASUS has 10 Gb/s USB 3.1 built in and is designed to fit in standard sized ATX cases. The 12.0 x 9.6" X99-A supports Intel Core i7 processors, the LGA2011-v3 socket, and the Intel X99 chipset. It has been designed to deliver power and speed to Internet browsing, extreme gaming, CAD software, and more. Power is critical for performance so the X99-A employs a Digital 8 Phase Power Design as well as an OC Socket that uses extra pins to connect a proprietary circuit to contacts found on Haswell-E's land grid array (LGA). Combined with ASUS UEFI (Unified Extensible Firmware Interface), this feature enables DDR4 memory frequencies and helps lower latencies and enhance stability while overclocking. The motherboard also features 5-Way Optimization, which includes better CPU performance, power saving and digital power control, fan control, and system cooling. The ASUS X99-A is compatible with Windows 8.1, 8, and 7 operating systems.

The ATX form factor of the X99-A can support up to 64GB of RAM and comes with 8 x DIMM slots that can each hold up to 8GB of DDR4 3300 (O.C.), 3200 (O.C.), 3000 (O.C.), 2800 (O.C.), 2666 (O.C.), 2400 (O.C.), and 2133 MHz non-ECC, unbuffered memory. The X99-A also has a total of 8 x SATA III 6 Gb/s ports, 1 x SATA Express connector, 1 x M.2 connector that only supports PCIe SSDs, 2 x USB 3.1/3.0/2.0 ports, 8 x USB 3.0/2.0 ports, 8 x USB 2.0/1.1 ports, 5 x audio jacks, 1 x S/PDIF out, and 1 x Intel I218V Gigabit LAN port.

To provide data redundancy, RAID 0, 1, 5, and 10 modes are supported and PCIe expansion is dependent on whether a 40 or 28-lane CPU is installed. When a 40-lane CPU is installed, users will have access to three PCIe 3.0/2.0 x16 (x16, x16/x16, x16/x16/x8) lanes. When a 28-lane CPU is installed, users will have access to three PCIe 3.0/2.0 x16 (x16, x16/x8, x16/x8/x4), one PCIe 2.0 x4 (x2 mode), and two PCIe 2.0 x1 lanes. While this motherboard does not have any video out ports, it does have multi-GPU support for NVIDIA Quad-GPU SLI technology, NVIDIA 3-Way SLI technology, AMD Quad-GPU CrossFireX technology, and AMD 3-Way CrossFireX technology.

The X99-A Motherboard is also equipped with 1 x PS/2 port and the capability to support 4K graphics. It includes 4 x SATA 6 Gb/s cables, 1 x SLI Bridge, and 1 x Q-connector (2-in-1). It is covered by a limited 3-year warranty.


CPU / DDR4 / OC Socket
Designed to help increase performance, the ASUS OC Socket utilizes extra pins to connect a circuit to contacts found on Haswell-E's land grid array (LGA). Combined with customized ASUS UEFI, this feature helps enable higher DDR4 memory frequencies, lower latencies, and enhanced stability while overclocking, extending all the way to extreme overclocking conditions, such as Liquid Nitrogen (LN2). The OC Socket is compatible with the Haswell-E LGA 2011-v3 CPUs, ensuring the ideal combination of overclocking performance and compatibility
Cache Bus Voltage Adjustment
Cache bus links areas such as CPU cores, DDR4 memory controllers, the system agent and the shared L3 cache. It serves as an interconnect for the whole CPU subsystem. Higher cache bus frequency also directly gives faster total sub-system performance. The ASUS OC Socket provides an adjustable cache bus voltage to help reach higher cache bus frequencies
Memory Speed
This motherboard supports DDR4 memory and it's able to drive memory frequencies to 3200 MHz and beyond when overclocked. ASUS T-Topology circuit design plus OC Socket helps provide memory-overclocking capabilities to unleash the full power of DDR4 by minimizing coupling noise and signal reflection. With equidistant memory channels, it delivers the balanced control and powerful overclocking compatibility
5-Way Optimization
One click takes care of 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 increased CPU performance, energy savings, stable digital power, cool and quiet fans, and networking and audio settings that are tailored for the apps that you are using. In short, 5-Way Optimization helps ensure that your PC is perfect for gaming, entertainment, productivity, and more
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. Fan Xpert 3 helps 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.

RPM Fixed Mode
Designed for users who wish to reduce noise levels to near 0 dB with highly specific fan speed controls

Auto Tuning Mode
Scans fan parameters through exclusive automatic speed detection to provide custom settings for each fan with a single click

Informative Fan Controls
Delivers complete information that allows you to take control over each fan
The 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.

EZ Mode
Fan Profile: Detailed CPU and case fan information to help with cooling
SATA Information: Displays SATA port details to help recognize devices
Fast Clock Adjustment: Use mouse controls to change the time and date
EZ XMP: Improve your DRAM performance with a click

Advanced Mode
GPU Post: Find out more about your graphics cards and slot bandwidth allocation. Works well with 2 or 3-way SLI or CrossFireX
Shortcut: Press Enter to create shortcuts to your favorite settings, or select an existing shortcut and press F4 to go straight there
Quick Notes: Makes notes and capture BIOS-related ideas quickly and conveniently
Last Modified Log: Track last change and save preferred profiles onto a USB drive
SATA Port Renaming: Rename SATA ports for easy identification

Fast Transfer Speeds

10 Gb/s USB 3.1
With USB 3.1 connectivity built in and dual Type-A ports for the fast USB data transfers, you'll experience data transfer speeds of up to 10 Gb/s, or twice as fast USB 3.0. The next-generation standard is also completely backward-compatible with your existing USB devices. ASUS' USB 3.1 Boost technology automatically helps accelerates USB 3.1 performance even further
SATA Express
SATA Express provides up to 10 Gb/s data transfer speeds from two PCIe 2.0 lanes. Current SSDs consume up to 550 MB/s, which is close to saturation point for SATA 6 Gb/s connections. SATA Express is also backwards compatible with up to two SATA drives
With a 4 x PCI Express 3.0/2.0 bandwidth, M.2 supports up to 32 Gb/s data-transfer speeds. It is a good choice for an operating system or application drive, helping to make your whole PC or professional apps work even faster

For Gamers and Professionals

App Specific Optimization
Gamers and professionals can get benefit from app specific optimizations from the ASUS Turbo App. Its tuning panel boosts a range of hardware; overclock your CPU, tune your fans, prioritize network data, and optimize audio settings automatically
Crystal Sound 2
Crystal Sound 2 helps optimize audio settings for the way you want to listen, be it gaming, chatting, watching movies, or relaxing to your favorite music. Onboard physical shielding, professionally engineered design and premium components, including Japanese-made audio capacitors and operational amplifiers (op-amps), result in sound output that has strong clarity and fidelity
Turbo LAN
Turbo LAN with cFosSpeed traffic-shaping technology adds even more lag-reducing support and an intuitive user interface. It allows you to lower lag with no expert knowledge. If you're a tweaker, use Advanced Mode for hardcore controls.

Gigabit Ethernet - Intel Gigabit Ethernet has the advantage of communicating directly with CPUs and offering high TCP and UDP throughput. This helps reduce the processor's workload so there's more power for your game and your gameplay

UDP - ASUS engineers used IxChariot, an independent network-assessment test tool, to determine just how much quicker Intel Gigabit Ethernet deals with the smaller (sub-256 byte) UDP data packets that are vital for responsive gaming. With the Intel X99 chipset, your game-data packets flow up to two times (2x) faster
Multi-GPU Support
With support for both NVIDIA SLI and AMD CrossFireX 2/3-way configurations, the X99 motherboard enables multi-GPU setups so you can harness the full power of the latest graphics technologies to drive games at 4K and beyond

Home Server

ASUS HomeCloud
ASUS HomeCloud creates a world without boundaries. It lets you access your PC remotely, stream multimedia content to virtually wherever you want, and manage all your stuff from anywhere - no matter where it's stored. It even turns your hard drive into private cloud storage, removing worries about storage limits
REMOTE GO! gives you complete control of your PC - even when you're away from home. Access your forgotten files at home, work on your PC while you are in the traffic or outside. Plus one step to manage all your public clouds or sync files among your PC and devices in a click.

Cloud GO! - Gather your ASUS WebStorage, Dropbox, Google Drive, and Skydrive accounts in one place and even backup to PC at the same time

File Transfer - Sync files between your PCs and smart devices with just a click

Remote Desktop - Access and control your PC virtually anytime and anywhere

Remote Keyboard and Mouse - Control media playback from your sofa
Digital PC Media Streamer Hub
Enjoy your PC's multimedia content virtually anywhere. Pipe music from your PC while sipping coffee in a cafe or sit back with friends and stream a favorite movie to a smart TV. With ASUS Media Streamer, your entertainment goes wherever you go
Intel CPU and Chipset Features
Intel Core i7 Processor LGA2011-v3 Ready
This motherboard supports Intel Core i7 processors in the LGA2011-v3 package, with memory and PCI Express controllers integrated to support 4-channel (8 DIMM) DDR4 memory and 40/28 PCI Express 3.0/2.0 lanes

Intel X99 Express Chipset
The Intel X99 Express Chipset is a single-chipset design that supports socket LGA2011-v3 Intel Core i7 processors. It provides improved performance by utilizing serial point-to-point links, allowing increased bandwidth and stability. Additionally, X99 provides 5 x USB 3.0 ports and 8 x SATA 6 Gb/s ports for faster data retrieval
In the Box
ASUS X99-A/USB 3.1 Motherboard
  • ASUS Q-Shield
  • 4 x SATA III 6 Gb/s Cables
  • SLI Bridge
  • Q-Connector (2-in-1)
  • Limited 3-Year Warranty
  • Table of Contents
    • 1Description

    ASUS X99-A specs

    CPU Intel Socket LGA2011-v3 Core i7 Processors
    Supports Intel 22 nm CPU
    Supports Intel Turbo Boost Technology
    Chipset Intel X99
    Memory 8 x DIMM, Max. 64 GB, DDR4 3300 (O.C.) / 3200 (O.C.) / 3000 (O.C.) / 2800 (O.C.) / 2666 (O.C.) / 2400 (O.C.) / 2133 MHz Non-ECC, Un-buffered Memory
    Multi-GPU Support Supports NVIDIA Quad-GPU SLI Technology
    Supports NVIDIA 3-Way SLI Technology
    Supports AMD Quad-GPU CrossFireX Technology
    Supports AMD 3-Way CrossFireX Technology
    Expansion Slots 40-Lane CPU
    3 x PCIe 3.0/2.0 x16 (x16, x16/x16, x16/x16/x8)

    28-Lane CPU
    3 x PCIe 3.0/2.0 x16 (x16, x16/x8, x16/x8/x4)
    1 x PCIe 2.0 x16 (x4 mode)
    2 x PCIe 2.0 x1 (x1 mode)
    Storage Intel Core i7 Processors
    1 x M.2 Socket 3, with M Key, type 2242/2260/2280/22110 storage devices support (Supports PCIe SSDs only)

    Intel X99 Chipset
    1 x SATA Express port, compatible with 2 x SATA III 6.0 Gb/s ports
    8 x SATA III 6 Gb/s ports
    Supports RAID 0, 1, 5, and 10
    Supports Intel Smart Response Technology and Intel Rapid Recovery Technology
    LAN Intel I218V, 1 x Gigabit LAN Controller
    Audio Realtek ALC1150 8-Channel High Definition Audio CODEC featuring Crystal Sound 2
    - Supports Jack-detection, Multi-streaming, and Front Panel Jack re-tasking
    - High quality 112 dB SNR stereo playback output (Line-out at rear) and 104 dB SNR stereo playback input (Line-in)
    - High-fidelity audio OP AMP(s)

    Audio Features
    - DTS Ultra PC II
    - DTS Connect
    - Optical S/PDIF out port at back panel
    - BD Audio Layer Content Protection
    - Audio Shielding: Helps ensure precision analog/digital separation and greatly reduced multi-lateral interference
    - Dedicated audio PCB layers: Separate layers for left and right channels to help guard the quality of the audio signals
    - Audio amplifier: Provides the high quality sound for headphones and speakers
    - Japanese-made audio capacitors: Provide warm, natural, and immersive sound with clarity and fidelity
    - Unique de-pop circuit: Helps reduces start-up popping noise to audio outputs
    - Top notch audio sensation delivers according to the audio configuration
    - EMI protection cover to help prevent electrical noise that may affect the quality of the amplifier
    USB Ports Intel X99 chipset
    5 x USB 3.0/2.0 ports (1 at the back panel, 4 at mid-board)
    8 x USB 2.0/1.1 ports (4 at the back panel, 4 at mid-board)

    ASMedia USB 3.0 controller
    3 x USB 3.0/2.0 ports (3 at the back panel, blue)

    ASMedia USB 3.1 controller
    2 x USB 3.1/3.0/2.0 ports (2 at the back panel, teal blue)
    Features 5-Way Optimization by Dual Intelligent Processors 5
    - Whole system optimization with a single click. The 5-Way Optimization tuning key consolidates TPU, EPU, DIGI+ Power Control, Fan Xpert 3, and Turbo App together, providing better CPU performance, more efficient power saving, precise digital power control, and whole system cooling. You can even tailor your own app usages

    ASUS 5X Protection
    - ASUS DIGI+ VRM - 8 Phase digital power design
    - ASUS Enhanced DRAM Overcurrent Protection - Short circuit damage prevention
    - ASUS ESD Guards - Enhanced ESD protection
    - ASUS High-Quality 5K-Hour Solid Capacitors - Up to 2.5x longer lifespan with good durability
    - ASUS Stainless Steel Back I/O - Up to 3x more durable corrosion-resistant coating

    - Auto Tuning
    - GPU Boost
    - TPU Switch

    - EPU Switch

    ASUS Digital Power Design
    - Digital 8 Phase Power Design
    - Digital 4 Phase DRAM Power Design
    - CPU Power Utility
    - DRAM Power Utility

    ASUS Exclusive Features
    - Remote GO!
    - USB BIOS Flashback
    - MemOK!
    - AI Suite 3
    - Ai Charger+
    - USB Charger+
    - M.2 & SATA Express
    - Anti-Surge
    - Onboard Button : Power/Reset
    - ASUS UEFI BIOS EZ Mode featuring a user-friendly graphics interface
    - USB 3.1 Boost
    - Disk Unlocker
    - Turbo LAN
    - Crystal Sound 2

    Interactive HomeCloud
    - Media Streamer

    - Precision Tweaker 2
    - ASUS O.C. Tuner
    - ASUS CrashFree BIOS 3
    - ASUS EZ Flash 2
    - ASUS USB BIOS Flashback
    - Push Notice

    ASUS Q-Design
    - ASUS Q-Shield
    - ASUS Q-Code
    - ASUS Q-LED (CPU, DRAM, VGA, Boot Device LED)
    - ASUS Q-Slot
    - ASUS Q-Connector

    Memory O.C. Design
    Turbo App
    Fan Xpert 3
    Operating System Support Windows 8.1, 8, and 7 (32 and 64-bit)
    Back I/O Ports 1 x PS/2 keyboard/mouse combo port
    1 x LAN (RJ45) port
    2 x USB 3.1 ports (teal blue)
    4 x USB 3.0 ports (blue)
    4 x USB 2.0 ports
    1 x Optical S/PDIF out
    5 x Audio jacks
    1 x USB BIOS Flashback Button
    Internal I/O Ports 1 x AAFP connector
    2 x USB 3.0 connectors support an additional 4 x USB 3.0 ports (19-pin)
    2 x USB 2.0 connectors support an additional 4 x USB 2.0 ports
    1 x SATA Express connector (gray)
    1 x M.2 Socket 3 with M Key design, type 2242/2260/2280/22110 storage devices support (supports PCIe SSDs only)
    1 x TPM connector
    1 x COM port connector
    8 x SATA 6 Gb/s connectors
    1 x CPU Fan connector (1 x 4-pin)
    1 x CPU OPT Fan connector (1 x 4-pin)
    4 x Chassis Fan connectors (4 x 4-pin)
    1 x S/PDIF out header
    1 x Thunderbolt header
    1 x 24-pin EATX Power connector
    1 x 8-pin ATX 12 V Power connector
    1 x EZ XMP switch
    1 x System panel (Q-Connector)
    1 x Chassis Intrusion connector
    1 x DRCT header
    1 x MemOK! button
    1 x Thermal sensor connector
    1 x TPU switch
    1 x EPU switch
    1 x CPU/DRAM overvoltage jumper
    1 x Power-on button
    1 x Reset button
    1 x Clear CMOS jumper
    1 x 5-pin EXT_FAN (Extension Fan) connector
    Form Factor ATX Form Factor
    12.0 x 9.6" / 30.5 x 24.4 cm
    Packaging Info
    Package Weight 3.85 lb
    Box Dimensions (LxWxH) 13.0 x 10.4 x 2.8"

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