MotherboardX99-A
x(continued on the next page)X99-A specifications summaryASUS Exclusive FeaturesFlagship Performance5-Way Optimization by Dual Intelligent Processors
3-26Chapter 3: BIOS setupChapter 3DO NOT remove the thermal module. The thermal conditions should be monitored.CPU Current Capability [Auto]This item
ASUS X99-A3-27Chapter 3Turbo Mode [Enabled]This item allows you to enable your core processor’s speed to run faster than the base operating frequency
3-28Chapter 3: BIOS setupChapter 3Fully Manual Mode [Disabled]Enable this item to congure the CPU-related voltages. This ASUS exclusive mode provides
ASUS X99-A3-29Chapter 3The following items appear only when you set the CPU Core Voltage to [Adaptive Mode].Additional Turbo Mode CPU Core Voltage [Au
3-30Chapter 3: BIOS setupChapter 3CPU SVID Support [Auto]Set this item to [Enabled] when overclocking. Disabling this item prevents the CPU from commu
ASUS X99-A3-31Chapter 3VTTDR Voltage (CHA/CHB) [Auto]This item allows you to set the termination voltage for the DRAM on the left. Use the <+> o
3-32Chapter 3: BIOS setupChapter 33.6 Advanced menuThe Advanced menu items allow you to change the settings for the CPU and other system devices.Be c
ASUS X99-A3-33Chapter 33.6.1 CPU ConfigurationThe items in this menu show the CPU-related information that the BIOS automatically detects.The items i
3-34Chapter 3: BIOS setupChapter 3Intel Virtualization Technology [Disabled]When set to [Enabled], a VMM can utilize the additional hardware capabilit
ASUS X99-A3-35Chapter 33.6.2 PCH ConfigurationThe following items appear only when you set the CPU states to [Enabled].Enhanced C1 state [Enabled]Thi
xi(continued on the next page)X99-A specifications summaryASUS Exclusive Features- Wi-Fi GO! & NFC Remote app for portable smartphone/tablet, sup
3-36Chapter 3: BIOS setupChapter 33.6.3 PCH Storage ConfigurationWhile entering Setup, the BIOS automatically detects the presence of SATA devices. T
ASUS X99-A3-37Chapter 3SATA Controller 1 Mode Selection [AHCI]This item allows you to set the SATA conguration.[Disabled] Disables the SATA function
3-38Chapter 3: BIOS setupChapter 33.6.4 System Agent ConfigurationDMI ConfigurationThe item in this menu allows your DMI (direct media interface) to
ASUS X99-A3-39Chapter 33.6.5 USB ConfigurationThe items in this menu allow you to change the USB-related features.The Mass Storage Devices item shows
3-40Chapter 3: BIOS setupChapter 3EHCI Legacy USB Support [Enabled][Enabled] Your system supports the USB 2.0 devices in legacy operating systems.[Di
ASUS X99-A3-41Chapter 33.6.6 Platform Misc ConfigurationThe items in this menu allow you to congure the platform-related features.SA - PCI ExpressSA
3-42Chapter 3: BIOS setupChapter 33.6.7 Onboard Devices ConfigurationScroll down to view the other BIOS items.HD Audio Controller [Enabled]This item
ASUS X99-A3-43Chapter 3Audio LED Switch [Auto][Auto] The audio LEDs only light up when the system is fully powered and operating.[Disabled] The audi
3-44Chapter 3: BIOS setupChapter 3Serial Port ConfigurationThe items in this menu allows you to set the parameters of the serial port.This items in th
ASUS X99-A3-45Chapter 3Power On By Ring [Disabled]This item allows you to enable/disable the Power On by Ring feature of your motherboard.Conguration
xiiASUS Special FeaturesASUS 5X Protection:- ASUS DIGI+ VRM - 8 Phase digital power design- ASUS Enhanced DRAM Overcurrent Protection - Short circui
3-46Chapter 3: BIOS setupChapter 33.7 Monitor menuThe Monitor menu displays the system temperature/power status, and allows you to change the fan set
ASUS X99-A3-47Chapter 3CPU Q-Fan Control [Auto]This item allows you to set the CPU Q-Fan operating mode.[Auto] Detects the type of CPU fan installed a
3-48Chapter 3: BIOS setupChapter 3Chassis Fan 1/4 Q-Fan Control [DC Mode]These items allow you to set the chassis fans’ Q-Fan control feature into DC
ASUS X99-A3-49Chapter 3Chassis Fan 1/4 Min. Duty Cycle(%) [60]Use the <+> or <-> keys to adjust the minimum chassis fan duty cycle. The va
3-50Chapter 3: BIOS setupChapter 3EXT Fan 1/3 Middle Temperature [45]Use the <+> or <-> keys to set the value for EXT Fan Middle Temperatu
ASUS X99-A3-51Chapter 33.8 Boot menuThe Boot menu items allow you to change the system boot options.Boot ConfigurationFast Boot [Enabled][Disabled]
3-52Chapter 3: BIOS setupChapter 3PS/2 Keyboard and Mouse Support [Auto][Auto] For a faster POST time, PS/2 devices are available when the system boot
ASUS X99-A3-53Chapter 3DirectKey (DRCT) [Enabled][Disabled] Disables the DirectKey button. The system will only power on or off when you press the Di
3-54Chapter 3: BIOS setupChapter 3The following items appear only when you set the Launch CSM to [Enabled].Boot Device Control [UEFI and Legacy OpROM]
ASUS X99-A3-55Chapter 3PK ManagementThe Platform Key (PK) locks and secures the rmware from any permissible changes. The system veries the PK before
xiiiInternal I/O Connectors1 x SATA Express connectors (gray)8 x SATA 6.0 Gb/s connectors (4 x gray, 4 x black)1 x 4-pin CPU Fan connector for both 3-
3-56Chapter 3: BIOS setupChapter 3The db le must be formatted as a UEFI variable structure with time-based authenticated variable.DBX ManagementThe d
ASUS X99-A3-57Chapter 33.9 Tool menuThe Tool menu items allow you to congure options for special functions. Select an item then press <Enter>
3-58Chapter 3: BIOS setupChapter 3Load from ProfileThis item allows you to load the previous BIOS settings saved in the BIOS Flash. Key in the prole
ASUS X99-A3-59Chapter 33.9.3 ASUS DRAM SPD InformationThis item allows you to view the DRAM SPD information.
3-60Chapter 3: BIOS setupChapter 33.10 Exit menuThe Exit menu items allow you to load the optimal default values for the BIOS items, and save or disc
ASUS X99-A3-61Chapter 33.11 Updating BIOSThe ASUS website publishes the latest BIOS versions to provide enhancements on system stability, compatibili
3-62Chapter 3: BIOS setupChapter 33. Press <Tab> to switch to the Drive eld.4. Press the Up/Down arrow keys to nd the USB ash disk that con
ASUS X99-A3-63Chapter 33.11.3 ASUS CrashFree BIOS 3The ASUS CrashFree BIOS 3 utility is an auto recovery tool that allows you to restore the BIOS le
3-64Chapter 3: BIOS setupChapter 3Booting the system in DOS environmentTo boot the system in DOS:1. Insert the USB ash drive with the latest BIOS l
ASUS X99-A3-65Chapter 32. On the BIOS Updater screen, press <Tab> to switch from Files panel to Drives panel then select D:. ASUSTeK BIOS Updat
xiv• If any of the above items is damaged or missing, contact your retailer.• The illustrated items above are for reference only. Actual product spe
3-66Chapter 3: BIOS setupChapter 3
ASUS X99-AA-1AppendicesAppendicesNoticesFederal Communications Commission StatementThis device complies with Part 15 of the FCC Rules. Operation is su
A-2AppendicesAppendicesIC: Canadian Compliance StatementComplieswiththeCanadianICES-003ClassBspecications.ThisdevicecomplieswithRSS210 o
ASUS X99-AA-3AppendicesREACHComplying with the REACH (Registration, Evaluation, Authorisation, and Restriction of Chemicals) regulatory framework, we
A-4AppendicesAppendicesASUS contact informationASUSTeK COMPUTER INC.Address 15 Li-Te Road, Peitou, Taipei, Taiwan 11259Telephone +886-2-2894-34
ASUS X99-AA-5AppendicesEC Declaration of Conformity We, the undersigned, Manufacturer: ASUSTeK COMPUTER INC. Address: 4F, No. 150, LI-TE Rd., PEITOU,
A-6AppendicesAppendices
xvInstallation tools and componentsThe tools and components in the table above are not included in the motherboard package.PC chassisPower supply unit
xvi
ASUS X99-A1-1Chapter 1Product introduction11.1 Special features1.1.1 Product highlightsLGA2011-v3 socket for Intel® Core™ i7 processorsThis motherbo
1-2Chapter 1: Product introductionChapter 1Complete USB 3.0 integrationThis motherboard offers you the strategic USB 3.0 accessibility for both the fr
ASUS X99-A1-3Chapter 1• Unplug the power cord from the wall socket before touching any component.• Before handling components, use a grounded wrist
iiE9736Revised Edition V2September 2014Copyright© 2014 ASUSTeK COMPUTER INC. All Rights Reserved.No part of this manual, including the products and so
1-4Chapter 1: Product introductionChapter 1Refer to 1.2.9 Internal connectors and 2.3.1 Rear I/O connection for more information about rear panel conn
ASUS X99-A1-5Chapter 1Layout contentsConnectors/Jumpers/Buttons and switches/Slots Page1. DDR4 DIMM slots 1-72. CPU, CPU optional, extension, and ch
1-6Chapter 1: Product introductionChapter 11.2.3 Central Processing Unit (CPU)The motherboard comes with a surface mount LGA2011-v3 socket designed f
ASUS X99-A1-7Chapter 1Recommended memory configurations1.2.4 System memoryThe motherboard comes with eight DDR 4 (Double Data Rate 4) Quad Inline Mem
1-8Chapter 1: Product introductionChapter 1• You may install varying memory sizes in Channel A, Channel B, Channel C, and Channel D. The system maps
ASUS X99-A1-9Chapter 1X99-A Motherboard Qualified Vendors Lists (QVL) DDR4 3000 (O.C.) MHz capabilityVendors Part No. Size SS/DSChip BrandChip NO. Tim
1-10Chapter 1: Product introductionChapter 1DDR4 2400 (O.C.) MHz capabilityVendors Part No. Size SS/DSChip BrandChip NO. Timing Voltage DIMM socket su
ASUS X99-A1-11Chapter 1DDR4 2133 MHz capabilityVendors Part No. Size SS/DSChip BrandChip NO. Timing Voltage DIMM socket support (Optional)2 4 6 8Micro
1-12Chapter 1: Product introductionChapter 1• Side(s): SS - Single-sided DS - Double-sided DIMM support: Supports one (1) module inserted into any
ASUS X99-A1-13Chapter 11.2.5 Expansion slotsUnplug the power cord before adding or removing expansion cards. Failure to do so may cause you physical
iiiContentsSafety information ... vAbout this guid
1-14Chapter 1: Product introductionChapter 1• We recommend that you provide sufcient power when running CrossFireX™ or SLI™ mode. • Connect a chass
ASUS X99-A1-15Chapter 1IRQ assignments for this motherboardA B C D E F G HPCIe x16_1 shared – – – – – – –PCIe x1_1 – shared – – – – –PCIe x16_2 shared
1-16Chapter 1: Product introductionChapter 11.2.6 Onboard buttons and switchesOnboard buttons and switches allow you to ne-tune performance when wor
ASUS X99-A1-17Chapter 13. MemOK! buttonInstalling DIMMs that are not compatible with the motherboard may cause system boot failure, and the DIAG_DRAM
1-18Chapter 1: Product introductionChapter 14. TPU switchWith its two-level adjustment functions, the TPU allows you to automatically adjusts the CPU
ASUS X99-A1-19Chapter 15. EPU switchEnable this switch to automatically detect the current PC loadings and intelligently moderate the power consumpti
1-20Chapter 1: Product introductionChapter 16. EZ XMP switchEnable this switch to overclock the installed DIMMs, allowing you to enhance the DIMM’s s
ASUS X99-A1-21Chapter 11.2.7 Jumpers1. Clear RTC RAM jumper (3-pin CLRTC)This jumper allows you to clear the Real Time Clock (RTC) RAM in CMOS. You c
1-22Chapter 1: Product introductionChapter 12. CPU Over Voltage jumper (3-pin CPU_OV)The CPU Over Voltage jumper allows you to set a higher CPU volta
ASUS X99-A1-23Chapter 11.2.8 Onboard LEDs1. POST State LEDsThe POST State LEDs provide the status of these key components during POST (Power-On-Self
ivChapter 3: BIOS setup3.1 Knowing BIOS ...3-13.2 BIOS set
1-24Chapter 1: Product introductionChapter 13. EPU LED (O2LED3)The EPU LED lights up when the EPU switch is enabled.4. EZ XMP LED (XLED)This LED lig
ASUS X99-A1-25Chapter 15. Q-Code LEDsThe Q-Code LED design provides you with a 2-digit error code that displays the system status. Refer to the Q-Cod
1-26Chapter 1: Product introductionChapter 1Code Description00Not used02microcode03CACHE_ENABLED04PCH initialization 06CPU_EARLY_INIT10PEI Core is sta
ASUS X99-A1-27Chapter 1Code Description94PCI Bus Enumeration95PCI Bus Request Resources96PCI Bus Assign Resources97 Console Output devices connect98Co
1-28Chapter 1: Product introductionChapter 1Code DescriptionD6 No Console Output Devices are foundD7 No Console Input Devices are foundD8 Invalid pass
ASUS X99-A1-29Chapter 11.2.9 Internal connectors1. Intel® X99 Serial ATA 6 Gb/s connectors (7-pin SATA6G_12, SATA6G_34, SATA6G_5, SATA6G_6/SATAE
1-30Chapter 1: Product introductionChapter 12. Digital audio connector (4-1 pin SPDIF_OUT)This connector is for an additional Sony/Philips Digital In
ASUS X99-A1-31Chapter 14. USB 3.0 connectors (20-1 pin USB3_12, USB3_34)These connectors allow you to connect a USB 3.0 module for additional USB 3.0
1-32Chapter 1: Product introductionChapter 1DO NOT connect a 1394 cable to the USB connectors. Doing so will damage the motherboard!You can connect th
ASUS X99-A1-33Chapter 16. CPU, CPU optional, extension, and chassis fan connectors (4-pin CPU_FAN; 4-pin CPU_OPT; 5-pin EXT_FAN, 4-pin CHA_FAN1-4)C
vSafety informationElectrical safety• To prevent electrical shock hazard, disconnect the power cable from the electrical outlet before relocating the
1-34Chapter 1: Product introductionChapter 1• For a fully congured system, we recommend that you use a power supply unit (PSU) that complies with AT
ASUS X99-A1-35Chapter 1• SystempowerLED(2-pinPLED)This 2-pin connector is for the system power LED. Connect the chassis power LED cable to this c
1-36Chapter 1: Product introductionChapter 19. TPM connector (20-1 pin TPM)This connector supports a Trusted Platform Module (TPM) system, which secu
ASUS X99-A1-37Chapter 111. Thunderbolt header (5-pin TB_HEADER)This connector is for the add-on Thunderbolt I/O card that supports Intel’s Thunderbol
1-38Chapter 1: Product introductionChapter 113. Chassis intrusion connector (4-1 pin CHASSIS)This connector is for a chassis-mounted intrusion detect
ASUS X99-A1-39Chapter 115. Front panel audio connector (10-1 pin AAFP)This connector is for a chassis-mounted front panel audio I/O module that suppo
1-40Chapter 1: Product introductionChapter 1
ASUS X99-A2-1Chapter 2Basic installation22.1 Building your PC system2.1.1 Motherboard installationThe diagrams in this section are for reference onl
2-2Chapter 2: Basic installationChapter 23. Place nine screws into the holes indicated by circles to secure the motherboard to the chassis.DO NOT ove
ASUS X99-A2-3Chapter 22.1.2 CPU installationPlease note the order in opening/ closing the double latch. Follow the instructions printed on the metal
viAbout this guideThis user guide contains the information you need when installing and conguring the motherboard.How this guide is organizedThis gui
2-4Chapter 2: Basic installationChapter 22.1.3 CPU heatsink and fan assembly installationApply the Thermal Interface Material to the CPU heatsink and
ASUS X99-A2-5Chapter 2To install the CPU heatsink and fan assembly
2-6Chapter 2: Basic installationChapter 2To remove a DIMM2.1.4 DIMM installation
ASUS X99-A2-7Chapter 22.1.5 ATX Power connectionOR OR
2-8Chapter 2: Basic installationChapter 22.1.6 SATA device connectionOROR
ASUS X99-A2-9Chapter 22.1.7 Front I/O ConnectorTo install ASUS Q-ConnectorUSB 2.0AAFPTo install USB 2.0 connector To install front panel audio connec
2-10Chapter 2: Basic installationChapter 22.1.8 Expansion Card installationTo install PCIe x16 cardsTo install PCIe x1 cards
ASUS X99-A2-11Chapter 22.2 BIOS update utilityUSB BIOS FlashbackUSB BIOS Flashback allows you to easily update the BIOS without entering the existing
2-12Chapter 2: Basic installationChapter 22.3 Motherboard rear and audio connections2.3.1 Rear I/O connectionRear panel connectors1.Keyboard/Mouse c
ASUS X99-A2-13Chapter 2• ThepluggedUSB3.0devicemayrunonxHCImodeorEHCImode,dependingontheoperating system’s setting.• USB3.0devices
viiConventions used in this guideTo ensure that you perform certain tasks properly, take note of the following symbols used throughout this manual.DAN
2-14Chapter 2: Basic installationChapter 2Connect to Headphone and MicConnect to Stereo Speakers2.3.2 Audio I/O connectionsAudio I/O portsConnect to
ASUS X99-A2-15Chapter 2Connect to 4.1 channel SpeakersConnect to 5.1 channel Speakers
2-16Chapter 2: Basic installationChapter 2When the DTS UltraPC II function is enabled, ensure to connect the rear speaker to the light blue port.2.4
ASUS X99-A2-17Chapter 2BIOS Beep DescriptionOne short beep VGA detectedQuick boot set to disabledNo keyboard detected One continuous beep followed by
2-18Chapter 2: Basic installationChapter 2
ASUS X99-A3-1Chapter 3The new ASUS UEFI BIOS is a Unied Extensible Interface that complies with UEFI architecture, offering a user-friendly interface
3-2Chapter 3: BIOS setupChapter 3• The BIOS setup screens shown in this section are for reference purposes only, and may not exactly match what you s
ASUS X99-A3-3Chapter 33.2.1 EZ ModeBy default, the EZ Mode screen appears when you enter the BIOS setup program. The EZ Mode provides you an overview
3-4Chapter 3: BIOS setupChapter 33.2.2 Advanced ModeThe Advanced Mode provides advanced options for experienced end-users to congure the BIOS settin
ASUS X99-A3-5Chapter 3Menu barThe menu bar on top of the screen has the following main items:My FavoritesFor saving the frequently-used system setting
viii(continued on the next page)X99-A specifications summaryCPULGA2011-v3 socket for the New Intel® Core™ i7 processorsSupports 22nm CPUSupports Intel
3-6Chapter 3: BIOS setupChapter 3Quick Note (F9)This button above the menu bar allows you to key in notes of the activities that you have done in BIOS
ASUS X99-A3-7Chapter 33.2.3 QFan ControlThe QFan Control allows you to set a fan prole or manually congure the operating speed of your CPU and chas
3-8Chapter 3: BIOS setupChapter 3Configuring fans manuallySelect Manual from the list of proles to manually congure your fans’ operating speed.To co
ASUS X99-A3-9Chapter 33.2.4 EZ Tuning WizardEZ Tuning Wizard allows you to overclock your CPU and DRAM, computer usage, and CPU fan to their best set
3-10Chapter 3: BIOS setupChapter 3Creating RAIDTo create RAID:1. Press <F11> on your keyboard or click from the BIOS screen to open EZ Tuning
ASUS X99-A3-11Chapter 33.3 My FavoritesMyFavorites is your personal space where you can easily save and access your favorite BIOS items.
3-12Chapter 3: BIOS setupChapter 3Adding items to My FavoritesTo add BIOS items:1. Press <F3> on your keyboard or click from the BIOS screen
ASUS X99-A3-13Chapter 33.4 Main menuThe Main menu screen appears when you enter the Advanced Mode of the BIOS Setup program. The Main menu provides y
3-14Chapter 3: BIOS setupChapter 3Administrator PasswordIf you have set an administrator password, we recommend that you enter the administrator passw
ASUS X99-A3-15Chapter 33.5 Ai Tweaker menuThe Ai Tweaker menu items allow you to congure overclocking-related items.Be cautious when changing the se
ix(continued on the next page)X99-A specifications summaryStorage- Supports Intel® Smart Response Technology, Intel® Rapid Recovery Technology*** Du
3-16Chapter 3: BIOS setupChapter 3The following item appears only when you set the CPU Strap to [100MHz], [125MHz], [167MHz], or [250MHz].Source Clock
ASUS X99-A3-17Chapter 32-Core Ratio Limit [Auto]Select [Auto] to apply the CPU default Turbo Ratio setting or manually assign a 2-Core Limit value tha
3-18Chapter 3: BIOS setupChapter 3Internal PLL Overvoltage [Auto]This item allows you to enable the internal PLL Overvoltage for K-SKU CPUs to get the
ASUS X99-A3-19Chapter 3Primary TimingsDRAM CAS# Latency [Auto]Conguration options: [Auto] [1] – [31]DRAM RAS# to CAS# Delay [Auto]Conguration option
3-20Chapter 3: BIOS setupChapter 3Third TimingstRRDR [Auto]Conguration options: [Auto] [1] - [7]tRRDD [Auto]Conguration options: [Auto] [1] - [7]tWW
ASUS X99-A3-21Chapter 3DRAM RTL (CHA D0 R1) [Auto]Conguration options: [Auto] [1] - [127]DRAM RTL (CHA D1 R0) [Auto]Conguration options: [Auto] [1]
3-22Chapter 3: BIOS setupChapter 3DRAM IO-L (CHB D1 R1) [Auto]Conguration options: [Auto] [1] - [255]DRAM IO-L (CHC D0 R0) [Auto]Conguration options
ASUS X99-A3-23Chapter 3Receiver DQ Pre-emphasis [Auto]Conguration options: [Auto] [0.90] - [1.60]Receiver DQ De-emphasis [Auto]Conguration options:
3-24Chapter 3: BIOS setupChapter 3MISCDRAM Eventual Voltage (CHA/CHB/CHC/CHD) [Auto]Use <+> or <-> to adjust the eventual voltages of the
ASUS X99-A3-25Chapter 3DO NOT remove the thermal module. The thermal conditions should be monitored.CPU VRM Switching Frequency [Auto]This item affect
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