Asus Pro WS C422-ACE User manual

Motherboard
Pro WS C422-ACE

ii
E15412
First Edition
August 2019
Copyright © 2019 ASUSTeK COMPUTER INC. All Rights Reserved.
No part of this manual, including the products and software described in it, may be reproduced,
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permission of ASUSTeK COMPUTER INC. (“ASUS”).
Product warranty or service will not be extended if: (1) the product is repaired, modied or altered, unless
such repair, modication of alteration is authorized in writing by ASUS; or (2) the serial number of the
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OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OR CONDITIONS OF
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Licenses. Such software in this product is distributed without any warranty to the extent permitted by the
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Where the applicable license entitles you to the source code of such software and/or other additional data,
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iii
Contents
Safety information...................................................................................................... iv
About this guide......................................................................................................... iv
Package contents....................................................................................................... vi
ASUS Pro WS C422-ACE specifications summary ................................................. vi
Chapter 1: Product Introduction
1.1 Before you proceed ...................................................................................1-1
1.2 Motherboard overview............................................................................... 1-1
1.3 Central Processing Unit (CPU) ...............................................................1-11
1.4 System memory .......................................................................................1-13
Chapter 2: BIOS Information
2.1 Managing and updating your BIOS ..........................................................2-1
2.2 BIOS setup program ..................................................................................2-4
2.3 Exit menu....................................................................................................2-9
Appendix
Q-Code table............................................................................................................ A-1
Notices .................................................................................................................... A-5

iv
Safety information
Electrical safety
• To prevent electrical shock hazard, disconnect the power cable from the electrical outlet
before relocating the system.
• When adding or removing devices to or from the system, ensure that the power cables
for the devices are unplugged before the signal cables are connected. If possible,
disconnect all power cables from the existing system before you add a device.
• Before connecting or removing signal cables from the motherboard, ensure that all
power cables are unplugged.
• Seek professional assistance before using an adapter or extension cord. These devices
could interrupt the grounding circuit.
• Ensure that your power supply is set to the correct voltage in your area. If you are not
sure about the voltage of the electrical outlet you are using, contact your local power
company.
• If the power supply is broken, do not try to x it by yourself. Contact a qualied service
technician or your retailer.
Operation safety
• Before installing the motherboard and adding devices on it, carefully read all the manuals
that came with the package.
• Before using the product, ensure all cables are correctly connected and the power
cables are not damaged. If you detect any damage, contact your dealer immediately.
• To avoid short circuits, keep paper clips, screws, and staples away from connectors,
slots, sockets and circuitry.
• Avoid dust, humidity, and temperature extremes. Do not place the product in any area
where it may become wet.
• Place the product on a stable surface.
• If you encounter technical problems with the product, contact a qualied service
technician or your retailer.
About this guide
This user guide contains the information you need when installing and conguring the
motherboard.
How this guide is organized
This guide contains the following parts:
• Chapter1:ProductIntroduction
This chapter describes the features of the motherboard and the new technology it
supports. It includes descriptions of the switches, jumpers, and connectors on the
motherboard.
• Chapter2:BIOSInformation
This chapter discusses changing system settings through the BIOS Setup menus.

v
Where to find more information
Refer to the following sources for additional information and for product and software
updates.
1. ASUS website
The ASUS website (www.asus.com) provides updated information on ASUS hardware
and software products.
2. Optional documentation
Your product package may include optional documentation, such as warranty yers,
that may have been added by your dealer. These documents are not part of the
standard package.
Conventions used in this guide
To ensure that you perform certain tasks properly, take note of the following symbols used
throughout this manual.
DANGER/WARNING: Information to prevent injury to yourself when trying to
complete a task.
CAUTION: Information to prevent damage to the components when trying to
complete a task.
IMPORTANT: Instructions that you MUST follow to complete a task.
NOTE: Tips and additional information to help you complete a task.
Typography
Bold text Indicates a menu or an item to select.
Italics Used to emphasize a word or a phrase.
<Key> Keys enclosed in the less-than and greater-than sign
means that you must press the enclosed key.
Example: <Enter> means that you must press the Enter or
Return key.
<Key1> + <Key2> + <Key3> If you must press two or more keys simultaneously, the key
names are linked with a plus sign (+).

vi
ASUS Pro WS C422-ACE specifications summary
Package contents
Check your motherboard package for the following items.
Motherboard 1 x ASUS Pro WS C422-ACE Motherboard
Cables 4 x Serial ATA 6.0Gb/s cables
Accessories
1 x M.2 Screw Package
1 x M.2 vertical bracket
1 x ASUS 2-Way VGA Holder
Application DVD 1 x Support DVD
Documentation 1 x User manual
If any of the above items is damaged or missing, contact your retailer.
CPU
Intel®Socket 2066 for Intel®Xeon™ W-Series Processors*
Supports 14nm CPU
Supports Intel®Turbo Boost Max Technology 3.0**
* Refer to www.asus.com for Intel®CPU support list.
** The support of these features depends on the CPU types.
Chipset Intel®C422 Chipset
Memory
Intel®Xeon™ W-Series Processors (4-core above)
- 8 x DIMM, Max. 512GB, DDR4 2933/2666/2400/2133 MHz RDIMM, LR-DIMM
Memory*
- Quad channel memory architecture
* Memory capacity supported depends on both CPU installed and Memory.
** Refer to www.asus.com for the Memory QVL (Qualified Vendors List).
Expansion
slots
48-Lane CPU(CLX-W, SKL-W)
2 x PCI Express 3.0/2.0 x16 slots (dual at x16/x16 mode)
1 x PCI Express 3.0/2.0 x16 slots (max. at x8 mode)*
* PCIEX16_3 shares bandwidth with U.2_2. Disable U.2_2 in BIOS settings to allow
PCIEX16_3 to run at x8 mode.
Multi-GPU
Support
Supports NVIDIA®2-Way & 3-Way/Quad-GPU SLI™ Technology
Supports AMD®2-Way & 3-Way/Quad-GPU CrossFireX™ Technology*
* This support depends on the CPU types and VGA cards.
(continued on the next page)

vii
ASUS Pro WS C422-ACE specifications summary
Storage
Intel®Xeon™ W-Series Processors support with RAID 0, 1, 5, 10 and Intel®
Virtual RAID (VROC) Support
1 x M.2_2 Socket 3 with M key, type 2242/2260/2280/22110 storage devices support
(PCIE 3.0 x4 mode)
1 x M.2_3 Socket 3 with M key, type 2242/2260/2280/22110 storage devices support
(PCIE 3.0 x4 mode)
1 x U.2_2 connector (supports U.2 NVMe device)*
Intel®C422 Chipset with RAID 0, 1, 5, 10
- 1 x M.2_1 Socket 3 with vertical M Key, type 2242/2260/2280/22110 (both SATA &
PCIE 3.0 x4 mode)
- 6 x SATA 6.0 Gb/s ports**
- 1 x U.2_1 connector (supports U.2 NVMe device)
* U.2_2 shares bandwidth with PCIEX16_3. A user may make a change to BIOS setting which
will allow PCIEX16_3 to run at x8.
** The SATA6G_1 shares bandwidth with M.2_1. SATA_1 will be disabled if M.2_1 is
populated by a SATA device.
LAN
Intel®I210-AT Gigabit LAN
Intel®I219-LM Gigabit LAN
ASUS LANGuard
ASUS Turbo LAN Utility
Audio
Realtek®S1220A 8-channel high definition audio CODEC featuring Crystal Sound 3
- Impedance sense for front and rear headphone outputs
- High quality 120dB SNR stereo playback output and 113dB SNR recording input
- Internal audio Amplier to enhance the highest quality sound for headphone and
speakers
- Power pre-regulator reduces power input noise to ensure consistent performance
- Unique de-pop circuit to reduce start-up popping noise to audio outputs
- Separate layer for left and right track, ensuring both sound deliver equal quality
- Audio shielding ensures precise analog/digital separation and greatly reduced multi-
lateral interference
- Premium Japan-made audio capacitors
- Supports up to 32-Bit/192kHz playback*
- Supports jack-detection, multi-streaming, front panel jack-retasking (MIC)
- Optical S/PDIF out port at back I/O
* Due to limitations in HDA bandwidth, 32-Bit/192kHz is not supported for 8-Channel audio.
32-Bit/192kHz is only available under Windows®10.
USB
Intel®C422 Chipset
- 8 x USB 3.2 Gen 1 ports (4 ports at back panel, 4 ports at mid-board)
- 6 x USB 2.0 ports (2 ports at back panel, 4 ports at mid-board)
ASMedia®USB 3.2 Gen 2 hub
- 4 x USB 3.2 Gen 2 ports at back panel, 3 type A + 1 type C
(continued on the next page)

viii
ASUS Pro WS C422-ACE specifications summary
ASUS
Exclusive
Features
<Performance>
5-Way Optimization
- Whole system optimization with a single click! Perfectly consolidates better
CPU performance, power saving, digital power control, system cooling and app
usages.
DIGI+ Power Control
- CPU Power: Digital 12 Power Stages
- DRAM Power: 1+1 Phase
EPU
Fan Xpert 4
UEFI BIOS
CrashFree BIOS 3
EZ Flash 3
EZ Tuning Wizard
<Connectivity>
Intel®VROC Ready
ASMedia®USB 3.2 Gen 2 Controller supports Multiple-INs function
Turbo LAN
ASUS NODE: hardware control interface
<EZ DIY>
OLED with ASUS LiveDash Utility
Q-Design
- ASUS Q-DIMM
- ASUS Q-LED (CPU, DRAM, VGA, Boot Device LED)
- ASUS Q-Code
- ASUS Q-Slot
Special
Features
ASUS SafeSlot - Protect your graphics card Investment
ASUS 5X Protection III
- ASUS LANGuard: Protects against LAN surges, lightning strikes and static-
electricity discharges!
- ASUS Overvoltage Protection: World-class circuit-protecting power design
- ASUS Stainless-Steel Back I/O: 3X corrosion-resistance for greater durability!
- ASUS ESD Guards - Enhanced ESD protection
- DIGI+ VRM: Digital 12 Power Stages
AI Suite 3
Ai Charger
ASUS Control Center Express
Thermal
Design
- ASUS Fan Xpert 4
- Fin with heatpipe solution heatsink and 22110 M.2 heatsink design
(continued on the next page)

ix
ASUS Pro WS C422-ACE specifications summary
Back Panel
I/O Ports
1 x Optical S/PDIF out
2 x Intel®LAN (RJ45) port(black)
4 x USB 3.2 Gen 2 ports (teal blue, 3 x Type-A, 1 x Type-C)
4 x USB 3.2 Gen 1 ports (Type-A)
2 x USB 2.0 ports
8-channel Audio I/O ports
Internal I/O
Connectors
2 x USB 3.2 Gen 1 connectors supporting additional 4 USB ports (19-pin)
2 x USB 2.0 connectors supporting additional 4 USB ports
1 x M.2_1 Socket 3 with vertical M Key, type 2242/2260/2280/22110 storage
devices support (both SATA & PCIE 3.0 x4 mode from PCH)
1 x M.2_2 Socket 3 with M Key, type 2242/2260/2280/22110 storage devices
support (PCIe 3.0 x4 mode from CPU)
1 x M.2_3 Socket 3 with M Key, type 2242/2260/2280/22110 storage devices
support (PCIe 3.0 x4 mode from CPU)
6 x SATA 6.0Gb/s connectors
1 x 4-pin AIO_PUMP fan connector
1 x 4-pin CPU Fan connector
1 x 4-pin CPU_OPT fan connector
3 x 4-pin Chassis Fan connectors
1 x 2-pin Thermal sensor header
1 x TPM header
1 x NODE connector supports FAN Extension Card II
1 x 24-pin EATX Power connector
2 x 8-pin EATX 12V Power connectors
1 x 6-pin EATX 12V Power connector
1 x Front panel audio connector (AAFP)
1 x COM connector
1 x VROC_HW_KEY
1 x System Panel connector
1 x Clear CMOS jumper
1 x BIOS Flashback button
1 x Reset button
1 x Q_Code
BIOS
128 Mb Flash ROM, UEFI AMI BIOS, PnP, SM BIOS 3.2, ACPI 6.0, Multi-
language BIOS, ASUS EZ Flash 3, CrashFree BIOS 3, F1 General Help, F2
Previous Values, F3 MyFavorite, F5 Optimized Default, F6 QFan Control, F7 EZ
mode/Advanced Mode, F9 Search, F10 Save, F11 EZ Tuning Wizard, F12 Print
Screen, and ASUS DRAM SPD (Serial Presence Detect) memory information
(continued on the next page)

x
ASUS Pro WS C422-ACE specifications summary
Manageability WfM 2.0, DMI 3.0, WOL by PME, PXE
Support DVD
Drivers
ASUS Utilities
EZ Update
Anti-virus software (OEM version)
OS Support Windows®10 64-bit
Form factor ATX Form Factor, 12”x 9.6” (30.5cm x 24.4cm)
Specications are subject to change without notice.

ASUS Pro WS C422-ACE 1-1
Product Introduction
1
1.1 Before you proceed
Take note of the following precautions before you install motherboard components or change
any motherboard settings.
• Unplugthepowercordfromthewallsocketbeforetouchinganycomponent.
• Beforehandlingcomponents,useagroundedwriststraportouchasafelygrounded
objectorametalobject,suchasthepowersupplycase,toavoiddamagingthemdue
to static electricity.
• Beforeyouinstallorremoveanycomponent,ensurethattheATXpowersupplyis
switched off or the power cord is detached from the power supply. Failure to do so
maycauseseveredamagetothemotherboard,peripherals,orcomponents.
1.2 Motherboard overview
Unplugthepowercordbeforeinstallingorremovingthemotherboard.Failuretodosocan
cause you physical injury and damage motherboard components.
Place this side
towards the rear
of the chassis
Chapter 1: Product Introduction

1-2 Chapter 1: Product Introduction
1.2.1 Layout contents
DDR4 DIMM slots
Install2GB,4GB,8GB,16GB,and32GBDDR4DIMMsintotheseDIMMsockets.
Formoredetails,referto1.4 System memory.
CPU, CPU optional, chassis, and AIO pump
fan connectors (4-pin CPU_FAN, 4-pin CPU_
OPT, 4-pin CHA_FAN1~3, 4-pin AIO_PUMP
FAN)
Connect the fan cables to the fan connectors on
themotherboard,ensuringthattheblackwire
of each cable matches the ground pin of the
connector.
CPU_FAN
CPU FAN PWM
CPU FAN IN
CPU FAN PWR
GND
AIO_PUMP PWM
AIO_PUMP IN
AIO_PUMP PWR
GND
AIO_PUMP FAN
CHA FAN PWM
CHA FAN IN
CHA FAN PWR
GND
CHA_FAN1~3
CPU_OPT
CPU OPT PWM
CPU OPT IN
CPU OPT PWR
GND
Connectors/Jumpers/Slots Page
1. DDR4DIMMslots 1-2
2. CPU,CPUoptional,chassis,andAIOpumpfanconnectors(4-pinCPU_FAN,4-pin
CPU_OPT,4-pinCHA_FAN1~3,4-pinAIO_PUMPFAN) 1-2
3. Intel®LGA2066CPUsocket 1-3
4. ATXpowerconnectors(24-pinEATXPWR,8-pinEATX12V_1-2,6-pinEATX12V3) 1-3
5. M.2sockets(M.2_1-3(SOCKET3)) 1-3
6. USB3.2Gen1connector(20-1pinU32G1_34;20-1pinU32G1_12) 1-4
7. SATA6Gb/sconnector(7-pinSATA6G_1-6) 1-4
8. Mini-SASHDconnector(U.2_1-2) 1-4
9. VROC_HW_KEYconnector(4-pinVROC_KEY) 1-4
10. Systempanelconnector(20-3pinPANEL) 1-5
11. USB2.0connector(10-1pinUSB1112;USB910) 1-5
12. ClearRTCRAM(2-pinCLRTC) 1-6
13. ThermalSensorconnector(2-pinT_SENSOR) 1-6
14. Nodeconnector(12-1pinNODE) 1-6
15. TPMconnector(14-1pinTPM) 1-6
16. USBBIOSFlashbackbutton 1-7
17. Power button 1-7
18. Q-CodeLED 1-7
19. Frontpanelaudioconnector(10-1pinAAFP) 1-8
20. PCIExpress3.0/2.0x16slots 1-8

ASUS Pro WS C422-ACE 1-3
Intel®LGA2066 CPU socket
Install Intel®LGA2066CPUintothissurfacemountLGA2066socket,whichis
designed for Intel®Xeon™W-SeriesProcessorsFamily(4-coreabove)processors.
Formoredetails,referto1.3 Central Processing Unit (CPU).
ATX power connectors (24-pin EATXPWR,
8-pin EATX12V_1-2, 6-pin EATX12V3)
CorrectlyorienttheATXpowersupplyplugs
intotheseconnectorsandpushdownrmly
untiltheconnectorscompletelyt.
EATX12V3
EATX12V_1-2
+12V DC
+12V DC
+12V DC
+12V DC
GND
GND
GND
GND
EATXPWR
PIN 1
PIN 1
GND
+5 Volts
+5 Volts
+5 Volts
-5 Volts
GND
GND
GND
PSON#
GND
-12 Volts
+3 Volts
+3 Volts
+12 Volts
+12 Volts
+5V Standby
Power OK
GND
+5 Volts
GND
+5 Volts
GND
+3 Volts
+3 Volts
EATX12V_1-2
+12V DC
+12V DC
+12V DC
+12V DC
GND
GND
GND
GND
EATXPWR
PIN 1
PIN 1
GND
+5 Volts
+5 Volts
+5 Volts
-5 Volts
GND
GND
GND
PSON#
GND
-12 Volts
+3 Volts
+3 Volts
+12 Volts
+12 Volts
+5V Standby
Power OK
GND
+5 Volts
GND
+5 Volts
GND
+3 Volts
+3 Volts
Ensuretoconnectthe8-pinpowerplug,orconnectboththe8-pinand6-pinpower
plugs.
• The8-pinPowerPlugLEDlightsuptoindicatethatthe8-pinpowerplugisnot
connected.
• Forafullyconguredsystem,werecommendthatyouuseapowersupplyunit
(PSU)thatcomplieswithATX12VSpecication2.0(orlaterversion)andprovides
aminimumpowerof350W.ThisPSUtypehas24-pinand8-pinpowerplugs.
• WerecommendthatyouuseaPSUwithhigherpoweroutputwhenconguringa
systemwithmorepower-consumingdevicesorwhenyouintendtoinstalladditional
devices.Thesystemmaybecomeunstableormaynotbootupifthepoweris
inadequate.
M.2 sockets (M.2_1-3(SOCKET3))
These sockets allow you to install
M.2(NGFF)SSDmodules.
M.2_2-3(SOCKET3)M.2_1(SOCKET3)
• TheM.2_1socketsupportsverticalMKeyand2242/2260/2280/22110storage
devices(bothSATA&PCIE3.0x4modefromPCH).
• TheM.2_2andM.2_3socketsupportsMKeyand2242/2260/2280/22110storage
devices(PCIe3.0x4modefromCPU).
TheM.2SSDmoduleispurchasedseparately.

1-4 Chapter 1: Product Introduction
USB 3.2 Gen 1 connector (20-1 pin U32G1_34;
20-1 pin U32G1_12)
ConnectaUSB3.2Gen1moduletoanyofthese
connectorsforadditionalUSB3.2Gen1frontorrear
panelports.TheseconnectorscomplywithUSB3.2
Gen1specicationsandprovidesfasterdatatransfer
speedsofupto5Gbps,fasterchargingtimeforUSB-
chargeabledevices,optimizedpowerefciency,and
backwardcompatibilitywithUSB2.0
U32G1
USB3+5V
IntA_P1_SSRX-
IntA_P1_SSRX+
GND
IntA_P1_SSTX-
IntA_P1_SSTX+
GND
IntA_P1_D-
IntA_P1_D+
GND
PIN 1
USB3+5V
IntA_P2_SSRX-
IntA_P2_SSRX+
GND
IntA_P2_SSTX-
IntA_P2_SSTX+
GND
IntA_P2_D-
IntA_P2_D+
SATA 6Gb/s connector (7-pin SATA6G_1-6)
TheseconnectorsconnecttoSerialATA6.0Gb/shard
diskdrivesviaSerialATA6.0Gb/ssignalcables.
GND
RSATA_TXP
RSATA_TXN
GND
RSATA_RXN
RSATA_RXP
GND
SATA6G
Mini-SAS HD connector (U.2_1-2)
TheMini-SASHDconnectorallowsyoutoconnecta
Mini-SASHDcabletosupportcongurationssuchasU.2
devicesorfourSATAdevices.
U.2
VROC_HW_KEY connector (4-pin VROC_KEY)
ThisconnectorallowsyoutoconnectaKEY
moduletoenableCPURAIDfunctionswithIntel®
CPURSTe.
• TheKEYmoduleispurchasedseparately.
• DuetoCPUbehavior,CPURAIDfunctionswithIntel®CPURSTeonlysupports
Intel®Core™X-seriesProcessors(6-coreorabove)andIntel®SSDmodules.

ASUS Pro WS C422-ACE 1-5
System panel connector (20-3 pin PANEL)
Thisconnectorsupportsseveralchassis-mounted
functions.
• System power LED (4-pin PWR_LED)
 This4-pinconnectorisforthesystempower
LED.ConnectthechassispowerLED
cable to this connector. The system power
LEDlightsupwhenyouturnonthesystem
power,andblinkswhenthesystemisin
sleep mode.
• SystempowerLED(2-pinor3-1pinPLED)
 The2-pinor3-1pinconnectorisforthesystempowerLED.
• HarddiskdriveactivityLED(2-pinHDD_LED)
 This2-pinconnectorisfortheHDDActivityLED.
• Systemwarningspeaker(4-pinSPEAKER)
 This4-pinconnectorisforthechassis-mountedsystemwarningspeaker.
• ATXpowerbutton/soft-offbutton(2-pinPWR_SW)
This connector is for the system power button.
• Resetbutton(2-pinRESET)
This 2-pin connector is for the chassis-mounted reset button for system
reboot without turning off the system power.
• Chassisintrusionconnector(2-pinCHASSIS)
This connector is for a chassis-mounted intrusion detection sensor or switch.
USB 2.0 connector (10-1 pin USB1112; USB910)
ConnectaUSBmodulecabletothisconnector,then
install the module to a slot opening at the back of the
systemchassis.ThisUSBconnectorscomplywith
USB2.0specicationsandsupportsupto480Mbps
connection speed.
USB+5V USB_P9- USB_P9+ GND NC
USB+5V
USB_P10-
USB_P10+
GND
USB910
PIN 1
USB+5V USB_P11- USB_P11+ GND NC
USB+5V
USB_P12-
USB_P12+
GND
USB1112
PIN 1

1-6 Chapter 1: Product Introduction
Clear RTC RAM (2-pin CLRTC)
ThisheaderallowsyoutocleartheCMOSRTCRAMdataof
thesystemsetupinformationsuchasdate,time,andsystem
passwords.
To erase the RTC RAM:
1. TurnOFFthecomputerandunplugthepowercord.
2. Useametalobjectsuchasascrewdrivertoshortthetwo
pins.
3. PlugthepowercordandturnONthecomputer.
4. Holddownthe<Del> key during the boot process and
enterBIOSsetuptore-enterdata.
CLRTC
+3V_BAT GND
PIN 1
Ifthestepsabovedonothelp,removetheonboardbatteryandshortthetwopinsagain
tocleartheCMOSRTCRAMdata.AfterclearingtheCMOS,reinstallthebattery.
Thermal Sensor connector (2-pin T_SENSOR)
TheThermalSensorconnectorallowsyoutoconnecta
sensortomonitorthetemperatureofthedevicesandthe
critical components inside the motherboard. Connect the
thermalsensorandplaceitonthedeviceorthemotherboard’s
component to detect its temperature.
Node connector (12-1 pin NODE)
TheNodeconnectorallowsyoutoconnectNode
compatibledevices.
Visitwww.asus.comformoreinformationaboutthedevicesandthelatestcompatibility
list.
TPM connector (14-1 pin TPM)
ThisconnectorsupportsaTrustedPlatformModule(TPM)
system,whichsecurelystorekeys,digitalcerticates,
passwordsanddata.ATPMsystemalsohelpsenhance
networksecurity,protectdigitalidentities,andensures
platform integrity.

ASUS Pro WS C422-ACE 1-7
USB BIOS Flashback button
USBBIOSFlashbackallowsyoutoeasilyupdatetheBIOSwithoutenteringthe
existingBIOSoroperatingsystem.SimplyinsertaUSBstoragedevicetotheUSB
port,presstheUSBBIOSFlashbackbuttonforthreeseconds,andtheBIOSis
updated automatically.
To use USB BIOS Flashback:
1. InsertaUSBstoragedevicetotheUSBFlashbackport.
WerecommendyoutouseaUSB2.0storagedevicetosavethelatestBIOSversionfor
better compatibility and stability.
2. Visithttps://www.asus.com/support/anddownloadthelatestBIOSversionfor
this motherboard.
3. RenametheleasPWCA.CAP,thencopyittoyourUSBstoragedevice.
4. Shutdownyourcomputer.
5. Onyourmotherboard,presstheBIOSFlashbackbuttonforthreeseconds
untiltheFlashbackLEDblinksthreetimes,indicatingthattheBIOS
Flashback function is enabled.
Power button
PressthePowerbuttontopowerupthesystem,orputthesystemintosleepor
soft-offmode(dependingontheoperatingsystemsettings).
ThePWR_LEDnearthebuttonalsolightsupwhenthesystemispluggedtoapower
source indicating that you should shut down the system and unplug the power cable
beforeremovingorinstallinganymotherboardcomponent.
Q-Code LED
TheQ-CodeLEDdesignprovidesyouwitha2-digiterrorcodethatdisplaysthe
system status.
• TheQ-CodeLEDprovidesthemostprobablecauseofanerrorcodeasastarting
pointfortroubleshooting.Theactualcausemayvaryfromcasetocase.
• PleaserefertotheQ-CodetableintheAppendix section for more details.

1-8 Chapter 1: Product Introduction
Front panel audio connector (10-1 pin AAFP)
This connector is for a chassis-mounted front panel
audioI/OmodulethatsupportsHDAudiostandard.
ConnectoneendofthefrontpanelaudioI/Omodule
cable to this connector.
AAFP
AGND NC SENSE1_RETUR SENSE2_RETUR
PORT1 L
PORT1 R PORT2 R
SENSE_SEND
PORT2 L
HD-audio-compliant
pin definition
PCI Express 3.0/2.0 x16 slots
ThismotherboardsupportsthreePCIExpress3.0/2.0x16graphiccardsthat
complywiththePCIExpressspecications.ActualPCIExpressspeedsvariesper
BIOSsettings.
• InsingleVGAcardmode,usethePCIe3.0x16_1slot(black)foraPCIExpressx16
graphics card to get better performance.
• ConnectachassisfantothemotherboardconnectorlabeledCHA_FAN1/2/3when
usingmultiplegraphicscardsforbetterthermalenvironment.
VGA configuration
PCI Express operating mode
PCIe 3.0 x16_1 PCIe 3.0 x16_2 PCIe 3.0 x16_3
Single VGA/PCIe card x16 N/A N/A
Dual VGA/PCIe cards x16 x16 N/A
3-Way VGA/PCIe cards x16 x16 x8

ASUS Pro WS C422-ACE 1-9
1. USB 2.0 portsThesefour4-pinUniversalSerialBus(USB)portsareforUSB2.0/1.1
devices.
2. USB 3.2 Gen 2 Type-A ports.These9-pinUniversalSerialBus3.2(USB3.2)ports
areforUSB3.2Gen2devices.
• USB3.2Gen1/Gen2devicescanonlybeusedasdatastorageonly.
• Westronglyrecommendthatyouconnectyourdevicestoportswithmatchingdata
transferrate.PleaseconnectyourUSB3.2Gen1devicestoUSB3.2Gen1portsand
yourUSB3.2Gen2devicestoUSB3.2Gen2portsforfasterandbetterperformance
foryourdevices.
3. USB 3.2 Gen 2 Type-A port.This9-pinUniversalSerialBus3.2(USB3.2)portisfor
USB3.2Gen2devices.
• USB3.2Gen1/Gen2devicescanonlybeusedasdatastorageonly.
• Westronglyrecommendthatyouconnectyourdevicestoportswithmatchingdata
transferrate.PleaseconnectyourUSB3.2Gen1devicestoUSB3.2Gen1portsand
yourUSB3.2Gen2devicestoUSB3.2Gen2portsforfasterandbetterperformance
foryourdevices.
1.2.2 Rear panel connectors

1-10 Chapter 1: Product Introduction
4. LAN (RJ-45) port.TheseportsallowGigabitconnectiontoaLocalAreaNetwork
(LAN)throughanetworkhub.
LAN port LED indications
Activity/Link LED Speed LED
Status Description Status Description
Off Nolink OFF 10Mbpsconnection
Orange Linked ORANGE 100Mbpsconnection
Orange(Blinking) Dataactivity GREEN 1Gbps connection
Orange(Blinking
thensteady)
ReadytowakeWakeup
fromS5mode
SPEED
LED
ACT/LINK
LED
LAN port
5. USB 3.2 Gen 2 Type-C™ port.This24-pinUniversalSerialBus(USB)portisforUSB
(TypeC)devices.
6. USB 3.2 Gen 1 Type-A ports.These9-pinUniversalSerialBus(USB)portsarefor
USB3.2Gen1devices.
• USB3.2Gen1devicescanonlybeusedfordatastorage.
• WestronglyrecommendthatyouconnectUSB3.2Gen1devicestoUSB3.2Gen1
portsforfasterandbetterperformancefromyourUSB3.2Gen1devices.
7. USB 3.2 Gen 1 Type-A ports.These9-pinUniversalSerialBus(USB)portsarefor
USB3.2Gen1devices.
• USB3.2Gen1devicescanonlybeusedfordatastorage.
• WestronglyrecommendthatyouconnectUSB3.2Gen1devicestoUSB3.2Gen1
portsforfasterandbetterperformancefromyourUSB3.2Gen1devices.
8. Optical S/PDIF OUT port.Thisportallowsyoutoconnectampliedspeakers,
headphones,orSony/PhillipsDigitalInterconnectFormat(S/PDIF)compliantdevices.
9. Audio I/O ports.Refertotheaudiocongurationtablebelowforthefunctionofthe
audioportsin2,4,5.1,or7.1-channelconguration.
Audio 2, 4, 5.1, or 7.1-channel configuration
Port Headset
2-channel 4-channel 5.1-channel 7.1-channel
LightBlue Line In Line In Line In SideSpeakerOut
Lime LineOut FrontSpeakerOut FrontSpeakerOut FrontSpeakerOut
Pink MicIn MicIn MicIn MicIn
Orange – – Center/Subwoofer Center/Subwoofer
Black –RearSpeakerOut RearSpeakerOut RearSpeakerOut