Asus ROG STRIX B550-XE GAMING WIFI User manual

Motherboard
ROG STRIX
B550-XE
GAMING WIFI

ii
E17342
First Edition
September 2020
Copyright © 2020 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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written permission of ASUSTeK COMPUTER INC. (“ASUS”).
Product warranty or service will not be extended if: (1) the product is repaired, modified or altered, unless
such repair, modification of alteration is authorized in writing by ASUS; or (2) the serial number of the
product is defaced or missing.
ASUS PROVIDES THIS MANUAL “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OR CONDITIONS OF
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DIRECTORS, OFFICERS, EMPLOYEES OR AGENTS BE LIABLE FOR ANY INDIRECT, SPECIAL,
INCIDENTAL, OR CONSEQUENTIAL DAMAGES (INCLUDING DAMAGES FOR LOSS OF PROFITS,
LOSS OF BUSINESS, LOSS OF USE OR DATA, INTERRUPTION OF BUSINESS AND THE LIKE),
EVEN IF ASUS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES ARISING FROM
ANY DEFECT OR ERROR IN THIS MANUAL OR PRODUCT.
SPECIFICATIONS AND INFORMATION CONTAINED IN THIS MANUAL ARE FURNISHED FOR
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Products and corporate names appearing in this manual may or may not be registered trademarks or
copyrights of their respective companies, and are used only for identification or explanation and to the
owners’ benefit, without intent to infringe.

iii
Contents
Safety information...................................................................................................... iv
About this guide.......................................................................................................... v
ROG STRIX B550-XE GAMING WIFI specifications summary................................ vi
Connectors with shared bandwidth .......................................................................... x
Package contents....................................................................................................... xi
Installation tools and components.......................................................................... xii
Chapter 1: Product Introduction
1.1 Before you proceed ...................................................................................1-1
1.2 Motherboard layout....................................................................................1-2
Chapter 2: Basic Installation
2.1 Building your PC system...........................................................................2-1
2.1.1 CPU installation...........................................................................2-1
2.1.2 Cooling system installation..........................................................2-2
2.1.3 DIMM installation.........................................................................2-5
2.1.4 M.2 installation ............................................................................2-6
2.1.5 Motherboard installation..............................................................2-8
2.1.6 ATX power connection................................................................2-9
2.1.7 SATA device connection.............................................................2-9
2.1.8 Front I/O connector ...................................................................2-10
2.1.9 Expansion card installation .......................................................2-11
2.1.10 Wi-Fi antenna installation..........................................................2-15
2.2 BIOS update utility...................................................................................2-16
2.3 Motherboard rear and audio connections ............................................. 2-17
2.3.1 Rear I/O connection ..................................................................2-17
2.3.2 Audio I/O connections...............................................................2-19
2.4 Starting up for the first time.................................................................... 2-21
2.5 Turning off the computer ........................................................................2-21
Chapter 3: BIOS and RAID Support
3.1 Knowing BIOS ............................................................................................3-1
3.2 BIOS setup program .................................................................................. 3-2
3.3 EZ Update ...................................................................................................3-2
3.4 ASUS EZ Flash 3 ........................................................................................ 3-3
3.5 ASUS CrashFree BIOS 3............................................................................3-4
3.6 RAID configurations ..................................................................................3-5
Appendix
Q-Code table............................................................................................................ A-1
Notices .................................................................................................................... A-5
ASUS contact information.................................................................................... A-12

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 fix it by yourself. Contact a qualified 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 qualified service
technician or your retailer.
• Your motherboard should only be used in environments with ambient temperatures
between 0°C and 40°C.

v
About this guide
This user guide contains the information you need when installing and configuring 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 description of the switches, jumpers, and connectors on the
motherboard.
• Chapter 2: Basic Installation
This chapter lists the hardware setup procedures that you have to perform when
installing system components.
• Chapter 3: BIOS and RAID Support
This chapter tells how to boot into the BIOS, upgrade BIOS using the EZ Flash Utility
and support on RAID.
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 flyers,
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.
CAUTION: Information to prevent damage to the components and injuries to
yourself 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.

vi
ROG STRIX B550-XE GAMING WIFI specifications
summary
CPU
AMD Socket AM4 for AMD Ryzen™ 5000 Series/ 4000 G-Series/ 3000
Series Desktop Processors*
* Refer to www.asus.com for CPU support list.
Chipset AMD B550 Chipset
Memory
AMD Ryzen™ 5000 Series/ 3000 Series Desktop Processors
4 x DIMM, Max. 128GB, 4866(O.C)/4600(O.C)/4400(O.C)/4266(O.C)/
4133(O.C)/ 4000(O.C)/3866(O.C)/3600(O.C)/3466(O.C.)/3200/3000/
2800/2666/ 2400/2133 MHz, Un-buffered Memory*
AMD Ryzen™ 4000 G-Series Desktop Processors
4 x DIMM, Max. 128GB, DDR4 5100(O.C)/4800(O.C.)/4600(O.C)/
4400(O.C)/4266(O.C.)/4133(O.C.)/4000(O.C.)/3866(O.C.)/3600(O.C.)/
3466(O.C.)/3200/3000/2800/2666/2400/2133 MHz Un-buffered Memory
Dual Channel Memory Architecture
* ECC memory (ECC mode) support varies by CPU.
** Refer to www.asus.com for the Memory QVL (Qualified Vendors Lists).
Graphics
1 x DisplayPort 1.2*
1 x HDMI™ 2.1 (4K@60HZ)*
* Graphics specifications may vary between CPU types.
Expansion Slots
AMD Ryzen™ 5000 Series/ 3000 Series Desktop Processors*
2 x PCIe 4.0 x16 SafeSlots (support x16 or x8/x8 modes)
AMD Ryzen™ 4000 G-Series Desktop Processors
2 x PCIe 3.0 x16 SafeSlots (support x16 or x8/x8 modes)
AMD B550 chipset
1 x PCIe 3.0 x16 slot (supports x4 mode)*
2 x PCIe 3.0 x1 slots
* PCIEX16_3 shares bandwidth with PCIEX1_1 and PCIE X1_2.
Multi-GPU Supports AMD 3-way CrossFireX™ Technology
Supports NVIDIA 2-Way SLI®Technology
Storage
Total supports 2 x M.2 slots and 6 x SATA 6Gb/s ports
AMD Ryzen™ 5000 Series/ 3000 Series Desktop Processors*
M.2_1 slot (Key M), type 2242/2260/2280/22110
(supports PCIe 4.0 x4 & SATA modes)
AMD Ryzen™ 4000 G-Series Desktop Processors
M.2_1 slot (Key M), type 2242/2260/2280/22110
(supports PCIe 3.0 x4 & SATA modes)
AMD B550 chipset
M.2_2 slot (Key M), type 2242/2260/2280/22110
(supports PCIe 3.0 x4 & SATA modes)
6 x SATA 6Gb/s ports
Support RAID 0, 1, 10
* When M.2_2 slot is populated, SATA6G_5/6 ports will be disabled.
Ethernet 1 x Intel®I225-V 2.5Gb Ethernet
ASUS LANGuard
(continued on the next page)

vii
ROG STRIX B550-XE GAMING WIFI specifications
summary
Wireless & Bluetooth
Intel®Wi-Fi 6 AX200
2x2 Wi-Fi 6 (802.11 a/b/g/n/ac/ax) support 1024QAM/OFDMA/MU-MIMO
Supports up to 2.4/5GHz transfer speed
Supports channel bandwidth: HT20/HT40/HT80/HT160
Bluetooth v5.1
*BT 5.1 function will be ready in Windows 10 build 19041 or later.
USB
Rear USB (Total 8 ports)
3 x USB 3.2 Gen 2 ports (2 x Type-A + 1 x Type-C®)
4 x USB 2.0 ports (4 x Type-A)
1 x USB 2.0 port (1 x audio USB Type-C®)
Front USB (Total 7 ports)
1 x USB 3.2 Gen 2 front panel connector (supports USB Type-C®)
1 x USB 3.2 Gen 1 header supports additional 2 USB 3.2 Gen 1 ports
2 x USB 2.0 headers support additional 4 USB 2.0 ports
Audio
ROG SupremeFX 7.1 Surround Sound High Definition Audio CODEC
S1220A
- Impedance sense for front and rear headphone outputs
- Jack-detection, Multi-streaming, Front Panel Jack-retasking
- High quality 120 dB SNR stereo playback output and 113 dB SNR
recording input
- Supports up to 32-Bit/192kHz playback*
Audio Features:
- SupremeFX Shielding Technology
- Dual OP Amplifiers
- Rear audio USB Type-C®port
- Premium Japanese audio capacitors
- Audio cover
* Due to limitations in HDA bandwidth, 32-Bit/192kHz is not supported for 7.1
Surround Sound audio.
Back Panel I/O Ports
3 x USB 3.2 Gen 2 ports (2 x Type-A + 1 x USB Type-C®)
4 x USB 2.0 ports
1 x USB 2.0 port (1 x audio USB Type-C®)
1 x DisplayPort
1 x HDMI™ port
1 x ASUS Wi-Fi Module
1 x Intel®I225-V 2.5Gb Ethernet port
5 x Audio jacks
1 x BIOS FlashBack™ button
Internal I/O connectors
Fan and cooling related
1 x 4-pin CPU Fan header
1 x 4-pin CPU OPT Fan header
1 x 4-pin AIO Pump header
3 x 4-pin Chassis Fan headers
(continued on the next page)

viii
ROG STRIX B550-XE GAMING WIFI specifications
summary
Internal I/O connectors
Power related
1 x 24-pin Main Power connector
1 x 8-pin +12V Power connector
1 x 4-pin +12V power connector
Storage related
2 x M.2 slots (Key M)
6 x SATA 6Gb/s ports
USB
1 x USB 3.2 Gen 2 front panel connector (supports USB Type-C®)
1 x USB 3.2 Gen 1 header supports additional 2 USB 3.2 Gen 1 ports
2 x USB 2.0 headers support additional 4 USB 2.0 ports
Miscellaneous
2 x AURA Addressable Gen 2 headers
2 x AURA RGB headers
1 x Clear CMOS header
1 x Front Panel Audio header (AAFP)
1 x S/PDIF header
1 x Speaker header
1 x 10-1 pin System Panel header
1 x Thermal sensor header
1 x Thunderbolt header
1 x Q-CODE
Special Features
AURA Sync
- AURA RGB headers
- Addressable Gen 2 RGB headers
ASUS Q-Design
- ASUS Q-CODE
- ASUS Q-DIMM
- ASUS Q-LED (CPU [red], DRAM [yellow], VGA [white], Boot Device
[yellow green)
- ASUS Q-Slot
ASUS Thermal Solution
- Aluminum M.2 heatsink
ASUS EZ DIY
- BIOS FlashBack™ button
- BIOS FlashBack™ LED
- Clear CMOS header
- ProCool
- Pre-mounted I/O shield
- SafeSlot
Rear audio USB Type-C®connector
(continued on the next page)

ix
ROG STRIX B550-XE GAMING WIFI specifications
summary
Software Features
ROG Exclusive Software
- RAMCache III
- ROG CPU-Z
- GameFirst VI
- Sonic Studio III + Sonic Studio Virtual Mixer
- Sonic Radar III
- DTS®Sound Unbound
- Overwolf
- Anti-virus software
ASUS Exclusive Software
Armoury Crate
- Aura Creator
- Aura Sync
- Ai Noise Canceling Microphone
AI Suite 3:
- Dual Intelligent Processors 5
TPU
EPU
DIGI+ VRM
Fan Xpert 4
Turbo APP
- EZ update
System Information
UEFI BIOS
ASUS EZ DIY
- ASUS CrashFree BIOS 3
- ASUS EZ Flash 3
- ASUS UEFI BIOS EZ Mode
- Flexkey
BIOS 256 Mb Flash ROM, UEFI AMI BIOS
Manageability WOL by PME, PXE
Operating System Windows®10 64-bit
Form Factor ATX Form Factor
12 inch x 9.6 inch (30.5 cm x 24.4 cm)
Specifications are subject to change without notice. Please refer to the ASUS website for
the latest specifications.

x
Connectors with shared bandwidth
DDR4 DIMM_B1 (64bit, 288-pin module) DDR4 DIMM_B2* (64bit, 288-pin module) DDR4 DIMM_A1 (64bit, 288-pin module) DDR4 DIMM_A2* (64bit, 288-pin module)
AIO_PUMP
CHA_FAN2
Q_CODE
CHA_FAN3
CPU_FAN
CPU_OPT
M.2_1(SOCKET3)
RGB_HEADER2
RGB_HEADER1
ADD GEN 2_2
ADD GEN 2_1
F_PANEL
AAFP
SPDIF_OUT
CLRTC
SPEAKER
T_SENSOR
256Mb
BIOS
CHA_FAN1
SATA6G_12SATA6G_34SATA6G_56
ATX_12V_1ATX_12V_2
EATXPWR
U32G1_12
Intel®
I225-V
BATTERY
HDMI
_DP
M.2(WIFI)
Super
I/O
ALC
210
PCIEX1_1
PCIEX1_2
2280 2260 2242
M.2_2(SOCKET3)
2280
22110
22110
2260 2242
TPU
ARUR
PCIEX16_2
PCIEX16_3
PCIEX16_1
USB_E34 USB_E12
TB_HEADER
USB_E5-8
AUDIO
AUDIO_TYPE-C
LAN_U32G2_34
SOCKET AM4
FLBK_LED1
BIOS_FLBK
USB3.2_7
U32G2_C5
AMD
B550
B
B
BOOT
VGA
DRAM
CPU
A
A
A
Configuration 1 2
A
PCIEX16_3 x4 x2
PCIEX1_1 - x1
PCIEX1_2 - x1
Configuration 1 2
BM.2_2 PCIe 3.0 x4 / SATA -
SATA6G_56 - v
• PCIEX16_3 shares bandwidth with PCIEX1_1 and PCIEX1_2. When PCIEX16_3
runs x4 mode, PCIEX1_1 and PCIEX1_2 will be disabled. PCIEX16_3 will run x2
mode when PCIEX1_1 or PCIEX1_2 is occupied.
• When M.2_2 slot is populated, SATA6G_56 will be disabled.

xi
Package contents
Check your motherboard package for the following items.
Motherboard 1 x ROG STRIX B550-XE GAMING WIFI motherboard
Cables
1 x Addressable RGB extension cable
1 x ROG audio USB Type-C®cable
1 x RGB extension cable
4 x SATA 6Gb/s cables
Miscellaneous
1 x Hyper M.2 X16 Gen 4 Card
1 x Cable ties pack
3 x M.2 Rubber packages
5 x M.2 SSD screw packages
1 x ROG key chain
1 x ROG Strix sticker
1 x ROG Strix thank you card
1 x ASUS 2x2 Dual_Band Wi-Fi moving antennas
Installation Media 1 x Support DVD
Documentation 1 x User manual
If any of the above items is damaged or missing, contact your retailer.

xii
Installation tools and components
Phillips (cross) screwdriver
PC chassis Power supply unit
AMD AM4 CPU AMD AM4/AM3 compatible CPU Fan
DDR4 DIMM SATA hard disk drive
SATA optical disc drive (optional) Graphics card (optional)
M.2 SSD module (optional) 1 Bag of screws
The tools and components in the table above are not included in the motherboard
package.

ROG STRIX B550-XE GAMING WIFI 1-1
Chapter 1
Product Introduction
1
Chapter 1: Product Introduction
• 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.
• Hold components by the edges to avoid touching the ICs on them.
• Whenever you uninstall any component, place it on a grounded antistatic pad or in
the bag that came with the component.
• 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.
1.1 Before you proceed
Take note of the following precautions before you install motherboard components or
change any motherboard settings.

1-2 Chapter 1: Product Introduction
Chapter 1
1.2 Motherboard layout
DDR4 DIMM_A1 (64bit, 288-pin module) DDR4 DIMM_A2* (64bit, 288-pin module) DDR4 DIMM_B1 (64bit, 288-pin module) DDR4 DIMM_B2* (64bit, 288-pin module)
AIO_PUMP
CHA_FAN2
Q_CODE
CHA_FAN1
CHA_FAN3
CPU_FAN
CPU_OPT
BOOT
VGA
DRAM
CPU
M.2_1(SOCKET3)
RGB_HEADER2
RGB_HEADER1
ADD GEN 2_2
ADD GEN 2_1
F_PANEL
AAFP
SPDIF_OUT
CLRTC
SPEAKER
T_SENSOR
256Mb
BIOS
SATA6G_12SATA6G_34SATA6G_56
ATX_12V_1ATX_12V_2
EATXPWR
U32G1_12
USB3.2_7
Intel®
I225-V
BATTERY
HDMI
_DP
Super
I/O
ALC
210
PCIEX1_1
PCIEX1_2
2280 2260 2242
M.2_2(SOCKET3)
2280
22110
22110
2260 2242
TPU
ARUR
PCIEX16_2
PCIEX16_3
PCIEX16_1
USB_E34 USB_E12
TB_HEADER
USB_E5-8
24.4cm(9.6in)
30.5cm(12in)
AUDIO
AUDIO_TYPE-C
LAN_U32G2_34
SOCKET AM4
FLBK_LED1
BIOS_FLBK
U32G2_C5
M.2(WIFI)
AMD
B550
9
8
7
6
5
22
11
124
21 11 181415
3
214 124
1710
6
20
5
13
19 164

ROG STRIX B550-XE GAMING WIFI 1-3
Chapter 1
Layout contents Page
1. CPU socket 1-4
2. DIMM slots 1-5
3. Expansion slots 1-7
4. Fan and Pump headers 1-9
5. Power connectors 1-10
6. M.2 slot 1-11
7. SATA 6Gb/s ports 1-12
8. USB 3.2 Gen 2 Front Panel connector 1-13
9. USB 3.2 Gen 1 header 1-13
10. USB 2.0 header 1-14
11. AURA Addressable Gen2 header 1-15
12. AURA RGB header 1-16
13. Clear CMOS header 1-17
14. Front Panel Audio header 1-18
15. S/PDIF Out header 1-18
16. Speaker header 1-19
17. System Panel header 1-20
18. Thermal Sensor header 1-21
19. Thunderbolt header 1-22
20. BIOS FlashBack™ LED 1-22
21. Q Code LED 1-23
22. Q-LEDs 1-23

1-4 Chapter 1: Product Introduction
Chapter 1
1. CPU socket
The motherboard comes with an AMD Socket AM4 for AMD Ryzen™ 5000 Series/ 4000
G-Series/ 3000 Series Desktop Processors.
SOCKET AM4
The AM4 socket has a different pinout design. Ensure that you use a CPU designed for
the AM4 socket. The CPU fits in only one correct orientation. DO NOT force the CPU into
the socket to prevent bending the connectors on the socket and damaging the CPU!
Ensure that all power cables are unplugged before installing the CPU.

ROG STRIX B550-XE GAMING WIFI 1-5
Chapter 1
2. DIMM slots
The motherboard comes with Dual Inline Memory Modules (DIMM) slots designed for DDR4
(Double Data Rate 4) memory modules.
A DDR4 memory module is notched differently from a DDR, DDR2, or DDR3 module. DO
NOT install a DDR, DDR2, or DDR3 memory module to the DDR4 slot.
DIMM_B1 DIMM_B2*
DIMM_A1 DIMM_A2*
Recommended memory configurations
DIMM_B2*
DIMM_A1
DIMM_A2*
DIMM_B2*
DIMM_A2*
DIMM_B1
DIMM_B2*

1-6 Chapter 1: Product Introduction
Chapter 1
Memory configurations
You may install 4 GB, 8 GB, 16 GB, and 32 GB unbuffered DDR4 DIMMs into the DIMM
sockets.
You may install varying memory sizes in Channel A and Channel B. The system maps
the total size of the lower-sized channel for the dual-channel configuration. Any excess
memory from the higher-sized channel is then mapped for single-channel operation.
• The default memory operation frequency is dependent on its Serial Presence Detect
(SPD), which is the standard way of accessing information from a memory module.
Under the default state, some memory modules for overclocking may operate at a
lower frequency than the vendor-marked value.
• For system stability, use a more efficient memory cooling system to support a full
memory load or overclocking condition.
• Always install the DIMMS with the same CAS Latency. For an optimum compatibility,
we recommend that you install memory modules of the same version or data code
(D/C) from the same vendor. Check with the vendor to get the correct memory
modules.
• Visit the ASUS website for the latest QVL.

ROG STRIX B550-XE GAMING WIFI 1-7
Chapter 1
3. Expansion slots
Unplug the power cord before adding or removing expansion cards. Failure to do so may
cause you physical injury and damage motherboard components.
1
2
3
4
5
PCIEX1_1
PCIEX1_2
PCIEX16_2
PCIEX16_3
PCIEX16_1
Please refer to the following table for the recommended VGA configuration.
Recommended VGA configuration
Slot Description Single VGA Dual VGA Triple VGA
1. PCIe 4.0 x16_1 x16 x8 x8
3. PCIe 4.0 x16_2 - x8 x8
5. PCIe 3.0 x16_3 - - x4
• We recommend that you provide sufficient power when running CrossFireX™ or SLI®
mode.
• Ensure to connect the 8-pin and 4-pin power plug when running CrossFireX™ mode.
• Connect a chassis fan to the chassis fan connectors when using multiple graphics
cards for better thermal environment.
PCIEX16_3 shares bandwidth with PCIEX1_1 and PCIEX1_2.

1-8 Chapter 1: Product Introduction
Chapter 1
Hyper M.2 X16 series card configuration
Slot PCIe bifurcation settings in PCIe x16 slots with different Ryzen™
CPUs
AMD Ryzen™ 5000 Series/ 3000 Series Desktop Processors (Support
PCIe Gen 4 SSDs)
Supported SSDs
PCIEX16_1 4 or 2
PCIEX16_2 0 or 2
• Hyper M.2 X16 series card is purchased separately.
• When using AMD Ryzen™ 5000 Series/ 3000 Series Desktop Processors and a
Hyper M.2 X16 series card with 4 M.2 SSDs, if you wish to connect a display, we
suggest installing a VGA card to PCIe X16_3, which will run at x4.
• Set PCIEX16_1 to [PCIe RAID Mode] under BIOS settings to enable the Hyper M.2
X16 series card.