Biostar B550MXC PRO User manual

FCC Informaon and Copyright
This equipment has been tested and found to comply with the limits of a Class B digital device,
pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protecon
against harmful interference in a residenal installaon. This equipment generates, uses, and can
radiate radio frequency energy and, if not installed and used in accordance with the instrucons,
may cause harmful interference to radio communicaons. There is no guarantee that interference
will not occur in a parcular installaon.
The vendor makes no representaons or warranes with respect to the contents here and
specially disclaims any implied warranes of merchantability or tness for any purpose. Further
the vendor reserves the right to revise this publicaon and to make changes to the contents here
without obligaon to nofy any party beforehand.
Duplicaon of this publicaon, in part or in whole, is not allowed without rst obtaining the
vendor’s approval in wring.
The content of this user’s manual is subject to be changed without noce and we will not be
responsible for any mistakes found in this user’s manual. All the brand and product names are
trademarks of their respecve companies.
Dichiarazione di conformità sinteca
Ai sensi dell’art. 2 comma 3 del D.M. 275 del
30/10/2002
Si dichiara che questo prodoo è conforme
alle normave vigen e soddisfa i requisi
essenziali richies dalle direve
2004/108/CE, 2006/95/CE e 1999/05/CE
quando ad esso applicabili
Short Declaraon of conformity
We declare this product is complying with the
laws in force and meeng all the essenal
requirements as specied by the direcves
2004/108/CE, 2006/95/CE and 1999/05/CE
whenever these laws may be applied
The terms HDMI and HDMI High-Denion Mulmedia Interface, and the HDMI Logo are trademarks or
registered trademarks of HDMI Licensing Administrator, Inc. in the United States and other countries.

2 | Table Of Contents
Table Of Contents
FCC Informaon and Copyright ������������������������������������������������������������������������������� 1
Chapter 1: Introducon������������������������������������������������������������������������������������������� 3
1.1 Before You Start.................................................................................................................. 3
1.2 Package Checklist................................................................................................................ 3
1.3 Specicaons...................................................................................................................... 4
1.4 Rear Panel Connectors........................................................................................................ 6
1.5 Motherboard Layout........................................................................................................... 7
Chapter 2: Hardware installaon����������������������������������������������������������������������������� 8
2.1 Install Central Processing Unit (CPU) .................................................................................. 8
2.2 Install a Heatsink................................................................................................................. 9
2.3 Connect Cooling Fans ....................................................................................................... 11
2.4 Install System Memory ..................................................................................................... 11
2.5 Expansion Slots ................................................................................................................. 13
2.6 Jumper & Switch Seng................................................................................................... 15
2.7 Headers & Connectors...................................................................................................... 16
2.8 LEDs .................................................................................................................................. 21
Chapter 3: UEFI BIOS & Soware��������������������������������������������������������������������������� 22
3.1 UEFI BIOS Setup................................................................................................................ 22
3.2 BIOS Update...................................................................................................................... 22
3.3 Soware............................................................................................................................ 27
Chapter 4: Useful help������������������������������������������������������������������������������������������� 30
4.1 Driver Installaon ............................................................................................................. 30
4.2 AMI BIOS Beep Code......................................................................................................... 31
4.3 AMI BIOS post code .......................................................................................................... 31
4.4 Troubleshoong................................................................................................................ 33
4.5 RAID Funcons.................................................................................................................. 34
APPENDIX I: Specicaons in Other Languages ����������������������������������������������������� 36
Arabic...................................................................................................................................... 36
German................................................................................................................................... 38
Spanish ................................................................................................................................... 40
Thai ........................................................................................................................................ 42
Japan....................................................................................................................................... 44

Chapter 1: Introducon | 3
B550MXC PRO
Chapter 1: Introducon
1�1 Before You Start
Thank you for choosing our product. Before you start installing the motherboard, please make
sure you follow the instrucons below:
• Prepare a dry and stable working environment with sucient lighng.
• Always disconnect the computer from power outlet before operaon.
• Before you take the motherboard out from an-stac bag, ground yourself properly
by touching any safely grounded appliance, or use grounded wrist strap to remove the
stac charge.
• Avoid touching the components on motherboard or the rear side of the board unless
necessary. Hold the board on the edge, do not try to bend or ex the board.
• Do not leave any unfastened small parts inside the case aer installaon. Loose parts
will cause short circuits which may damage the equipment.
• Keep the computer from dangerous area, such as heat source, humid air and water.
• The operang temperatures of the computer should be 0 to 45 degrees Celsius.
• To avoid injury, be careful of:
Sharp pins on headers and connectors
Rough edges and sharp corners on the chassis
Damage to wires that could cause a short circuit
1.2 Package Checklist
• Serial ATA Cable x2
• Rear I/O Panel for ATX Case x1
• Quick Installaon Guide x1
• Fully Setup Driver DVD x1
Note
»
»The package contents may be dierent due to the sales region or models in which it was sold. For
more informaon about the standard package in your region, please contact your dealer or sales
representave.

4 | Chapter 1: Introducon
1�3 Specifications
Specicaons
CPU Support
Socket AM4 support AMD® Ryzen™ 3rd Gen (Masse/ Renoir) and Ryzen™ 4th Gen
(Vermeer/ Cezanne) processors
Support for future AMD® Ryzen processors with BIOS update
* Please refer to www.biostar.com.tw for CPU support list.
Chipset AMD® B550
Memory
4th Gen AMD Ryzen Processors (Vermeer CPUs/ Cezanne APUs):
Supports Dual Channel DDR4 1866/2133/2400/2666/2933/3200/4533(OC)
3rd Gen AMD Ryzen Processors (Masse CPUs):
Supports Dual Channel DDR4 1866/2133/2400/2666/2933/3200/4533(OC)
3rd Gen AMD Ryzen with Radeon Graphics Processors (Renoir APUs):
Supports Dual Channel DDR4 1866/2133/2400/2666/2933/3200/4533(OC)
4 x DDR4 DIMM Memory Slot, Max. Supports up to 128 GB Memory
Each DIMM supports non-ECC and ECC Un-buered 8/ 16/ 32 GB DDR4 module
* Please refer to www.biostar.com.tw for Memory support list.
Storage
-- Total supports 2x M.2 socket and 8 x SATA III (6Gb/s) ports
4x SATA III Connector (6Gb/s) : Supports AHCI & RAID 0, 1, 10 only for SATA1 ~ SATA4 ports*
1x M.2 (M Key) Socket (M2_PCIEG4_64G_SATA)(From AMD Processors):
Supports M.2 Type 2242/ 2260/ 2280 SSD module
Supports PCI-E 4.0 x4 (64Gb/s)/ 3.0 x4 (32Gb/s)** - NVMe/ AHCI & SATA III (6.0Gb/s) SSD
1x M.2 (M Key) Socket (M2_PCIEG3_32G_SATA)(From AMD B550 Chipset):
Supports M.2 Type 2280 SSD module
Supports PCI-E 3.0 x4 (32Gb/s) - NVMe/ AHCI & SATA III (6.0Gb/s) SSD
*If use both M2 socket devices and SATA1~4 ports, are NOT disabled.
** M.2 (M Key) Socket (M2_PCIEG4_64G_SATA) : The bandwidth is depended on CPU. Supports
PCI-E 4.0 x4 (64Gb/s) speed, which depends only on Ryzen Masse and Vermeer CPUs.
PCI-E 3.0 x4 (32Gb/s) speed, which depends only on Ryzen Renoir and Cezanne CPUs.
LAN Realtek RTL8111H
10/ 100/ 1000 Mb/s auto negoaon, Half / Full duplex capability
Audio Codec Realtek ALC897
7.1 Channels, High Denion Audio, Hi-Fi (Front)
USB
1x USB 3.2 (Gen2) Type-C port (1 on rear I/O)
1x USB 3.2 (Gen2) port (1 on rear I/O)
6x USB 3.2 (Gen1) port (4 on rear I/Os and 2 via internal headers)
6x USB 2.0 port (2 on rear I/Os and 4 via internal headers)
Expansion Slots
1x PCIe 4.0/ 3.0 x16 Slot (PCIEG4X16):
Supports PCIe 3.0 x16/ 4.0 x16 mode with AMD® Ryzen™ processors.
Supports PCIe 3.0 x16 mode AMD® Ryzen™ with Radeon Vega Graphics processors.
1x PCIe 3.0 x16 Slot (PCIEG3X1_1) : Supports x1 mode
1x PCIe 3.0 x16 Slot (PCIEG3X1_2) : Supports x1 mode
1x PCIe 3.0 x16 Slot (PCIEG3X1_3) : Supports x1 mode
* According to dierent CPUs will have dierent speeds.
* PCIe 4.0 speed only for AMD® Ryzen™ 3rd Gen Masse and 4th Gen Vermeer CPUs.
Rear I/Os
2x WIFI Antenna Port
1x PS/2 Keyboard / Mouse
1x HDMI Port
1x LAN port
4x USB 3.2 (Gen1) Port
2x USB 2.0 Port
3x Audio Jack
1x USB 3.2 (Gen2) Type-C port
1x USB 3.2 (Gen2) port

Chapter 1: Introducon | 5
B550MXC PRO
Specicaons
Internal I/Os
8x SATA III (6.0Gb/s) Connector
1x M.2 (E Key) Socket : Supports 2230 type Wi-Fi & Bluetooth module
2x USB 2.0 Header (each header supports 2 USB 2.0 ports)
1x USB 3.2 (Gen1) Header (each header supports 2 USB 3.2 (Gen1) ports)
1x 8-Pin Power Connector
1x 24-Pin Power Connector
1x CPU Fan Connector
2x System Fan Connector
1x Front Panel Header
1x Front Audio Header
1x Internal Stereo Speaker Header
1x Clear CMOS Header
1x S/PDIF out Connector
1x COM Port Header
1x TPM Header
2x LED Header (5V)
1x LED Header (12V)
1x Debug LED
* M.2 (E key) Wi-Fi card is not provided
Form Factor uATX Form Factor, 244 mm x 244 mm
OS Support Windows 11(64bit) / 10(64bit)
Biostar reserves the right to add or remove support for any OS with or without noce.

6 | Chapter 1: Introducon
1.4 Rear Panel Connectors
Note
»
»HDMI output require an AMD® family processor with intedrated graphics.
»
»Since the audio chip supports High Denion Audio Specicaon, the funcon of each audio jack
can be dened by soware. The input / output funcon of each audio jack listed above represents
the default seng. However, when connecng external microphone to the audio port, please use
the Line In and Mic In audio jack.
»
»Maximum resoluon
HDMI: 4096 x 2160 @30Hz, compliant with HDMI 1.4
»
»When using the front HD audio jack and plug in the headset, the rear sound will be automacally
Disabled.

Chapter 1: Introducon | 7
B550MXC PRO
1.5 Motherboard Layout
Note
»
» represents the 1st pin.

8 | Chapter 2: Hardware installaon
Chapter 2: Hardware installaon
2.1 Install Central Processing Unit (CPU)
Step 1: Locate the CPU socket on the motherboard
Step 2: Pull the socket locking out from the socket and then raise the lever up to a 90-degree
angel.
Step 3: Look for the white triangle on socket, and the gold triangle on CPU should point
towards this white triangle. The CPU will t only in the correct orientaon.

Chapter 2: Hardware installaon | 9
B550MXC PRO
Step 4: Hold the CPU down rmly, and then close the lever to locked the posion
Note
»
»Please turn o the Power Supply before remove the CPU socket.
2.2 Install a Heatsink
<TypeA>
Step 1: Place the heatsink and fan assembly onto the retenon frame. Match the heatsink clip
with the socket mounng-lug. Hook the spring clip to the mounng-lug.
Step 2: On the other side, push the retenon clip straight down to lock into the plasc lug on
the retenon frame, and then press down the locker unl it stops.

10 | Chapter 2: Hardware installaon
<TypeB>
Step 1: Remove the heatsink and fan assembly bracket on the motherboard and keep the
cooler backplane under the motherboard.
Step 2: Place the heatsink and fan assembly on top of the installed CPU and make sure that the
fan cable is closest to the CPU fan connector. Please refer diagram to the following screw into
the screw hole in the order shown.
Note
»
»Do not forget to connect the CPU fan connector.
»
»For proper installaon, please kindly refer to the installaon manual of your CPU heatsink.

Chapter 2: Hardware installaon | 11
B550MXC PRO
2.3 Connect Cooling Fans
These fan headers support cooling-fans built in the computer. The fan cable and connector
may be dierent according to the fan manufacturer.
CPU_FAN: CPU Fan Header
Pin Assignment
1 Ground
2 +12V
3FAN RPM rate sense
4 AI Fan Control
SYS_FAN1/ SYS_FAN2: System Fan Header
Pin Assignment
1 Ground
2 +12V
3FAN RPM rate sense
4 AI Fan Control
Note
»
»CPU_FAN, SYS_FAN1/ SYS_FAN2 support 4-pin and 3-pin head connectors. When connecng with
wires onto connectors, please note that the red wire is the posive and should be connected to
pin#2, and the black wire is Ground and should be connected to pin#1(GND).
2.4 Install System Memory
DDR4 Modules

12 | Chapter 2: Hardware installaon
Step 1: Unlock a DIMM slot by pressing the retaining clips outward. Align a DIMM on the slot
such that the notch on the DIMM matches the break on the slot.
Step 2: Insert the DIMM vercally and rmly into the slot unl the retaining clips snap back in
place and the DIMM is properly seated.
Note
»
»If the DIMM does not go in smoothly, do not force it. Pull it all the way out and try again.
Memory Capacity
DIMM Socket Locaon DDR4 Module Total Memory Size
DDR4_A1 8GB/16GB/32GB
Max is 128GB.
DDR4_A2 8GB/16GB/32GB
DDR4_B1 8GB/16GB/32GB
DDR4_B2 8GB/16GB/32GB
Dual Channel Memory Installaon
Please refer to the following requirements to acvate Dual Channel funcon:
Install memory module of the same density in pairs, shown in the table.
Dual Channel Status DDR4_A1 DDR4_A2 DDR4_B1 DDR4_B2
Enabled O X O X
Enabled X O X O
Enabled O O O O
(O means memory installed, X means memory not installed.)
Note
»
»When installing more than one memory module, we recommend to use the same brand and
capacity memory on this motherboard.

Chapter 2: Hardware installaon | 13
B550MXC PRO
2.5 Expansion Slots
PCIEG4X16: PCI-Express Gen3/ Gen4 x16 Slot (x16 Mode)
• PCI-Express 3.0 compliant. The maximum bandwidth of the PCIe slot is 32GB/s.
• PCI-Express 4.0 compliant. The maximum bandwidth of the PCIe slot is 64GB/s.
• Supports PCIe 3.0 x16/ 4.0 x16 mode with AMD® Ryzen™ processors.
• Supports PCIe 3.0 x16 mode AMD® Ryzen™ with Radeon Vega Graphics processors.
PCIEG3X1_1/ PCIEG3X1_2/ PCIEG3X1_3 : PCI-Express Gen3 x1 Slot
• PCI-Express 3.0 compliant.
• The maximum bandwidth of the PCIe slot is 8GB/s.
M2_PCIEG4_64G_SATA M.2 (M Key) Socket:
• The M.2 slot supports M.2 Type 2242/ 2260/ 2280 SSD module. When installing M.2 SSD
module, please place the screw and hex pillar to correct posion.
• Support M.2 SATA III (6.0 Gb/s) module and M.2 PCI Express module up to Gen4 x4
(64Gb/s) or Gen3 x4 (32Gb/s) - NVMe/ AHCI SSD.
M2_PCIEG3_32G_SATA M.2 (M Key) Socket:
• The M.2 slot supports M.2 Type 2280 SSD module. When installing M.2 SSD module,
please place the screw and hex pillar to correct posion.
• Support M.2 SATA III (6.0 Gb/s) module and M.2 PCI Express module up to Gen3 x4
(32Gb/s) - NVMe/ AHCI SSD.
Note
»
»According to dierent CPUs will have dierent speeds.
»
»PCIe 4.0 speed only for AMD® Ryzen™ 3rd Gen Masse and 4th Gen Vermeer CPUs.
»
»M.2 (M Key) Socket (M2_PCIEG4_64G_SATA): The bandwidth is depended on CPU.
Supports PCI-E 4.0 x4 (64Gb/s) speed, which depends only on Ryzen 3rd Gen Masse and 4th Gen
Vermeer CPUs.

14 | Chapter 2: Hardware installaon
HYBRID_WIFI6: M.2 (E Key) Socket (M.2 (E Key) Wi-Fi card is not provided)
• Support M.2 socket 2230 type module.
• Supports WiFi/ Bluetooth module.
Install an Expansion Card
You can install your expansion card by following steps:
• Read the related expansion card’s instrucon document before install the expansion
card into the computer.
• Remove your computer’s chassis cover, screws and slot bracket from the computer.
• Place a card in the expansion slot and press down on the card unl it is completely
seated in the slot.
• Secure the card’s metal bracket to the chassis back panel with a screw. (This step is only
• for installing a VGA card.).
• Replace your computer’s chassis cover.
• Power on the computer, if necessary, change BIOS sengs for the expansion card.
• Install related driver for the expansion card.
Note
»
»Please be note that you will need to use M2 type screwdriver if you want to install or uninstall the
screw. It is recommended not to use a screwdriver that does not meet the specicaons, otherwise
the screw may be damaged.

Chapter 2: Hardware installaon | 15
B550MXC PRO
2.6 Jumper & Switch Setting
The illustraon shows how to set up jumpers. When the jumper cap is placed on pins, the
jumper is “close”, if not, that means the jumper is “open”.
Pin opened Pin closed Pin 1-2 closed
JCMOS1: Clear CMOS Jumper
The jumper allows users to restore the BIOS safe seng and the CMOS data. Please carefully
follow the procedures to avoid damaging the motherboard.
Pin 1-2 Open:
Normal Operaon (default).
Pin 1-2 Short:
Clear CMOS data.
Clear CMOS Procedures:
1. Remove AC power line.
2. Set the jumper to “Pin 1-2 short”, you can use a metal object like a screwdriver to touch the
two pins.
3. Wait for ve seconds.
4. Aer clearing the CMOS values, be sure the jumper is “Pin 1-2 open”.
5. Power on the AC.
6. Load Opmal Defaults and save sengs in CMOS.

16 | Chapter 2: Hardware installaon
2.7 Headers & Connectors
ATX: ATX Power Source Connector
For beer compability, we recommend to use a standard ATX 24-pin power supply for this
connector. Make sure to nd the correct orientaon before plugging the connector.
Pin Assignment Pin Assignment
13 +3.3V 1 +3.3V
14 -12V 2 +3.3V
15 Ground 3 Ground
16 PS_ON 4 +5V
17 Ground 5 Ground
18 Ground 6 +5V
19 Ground 7 Ground
20 NC 8PW_OK
21 +5V 9 Standby Voltage+5V
22 +5V 10 +12V
23 +5V 11 +12V
24 Ground 12 +3.3V
ATX_12V_2X4: ATX Power Source Connector
The connector provides +12V to the CPU power circuit. If the CPU power plug is 4-pin, please
plug it into Pin 1-2-5-6 of ATX_12V_2X4.
Pin Assignment
1 +12V
2 +12V
3 +12V
4 +12V
5 Ground
6 Ground
7 Ground
8 Ground
Note
»
»Before you power on the system, please make sure that both ATX and ATX_12V_2X4 connectors
have been plugged-in.
»
»Insucient power supplied to the system may result in instability or the peripherals not funconing
properly. Use of a PSU with a higher power output is recommended when conguring a system with
more power-consuming devices.

Chapter 2: Hardware installaon | 17
B550MXC PRO
F_PANEL: Front Panel Header
This connector includes Power-on, Reset, HDD LED and Power LED connecons. It allows user
to connect the PC case’s front panel switch funcons.
Pin Assignment Funcon Pin Assignment Funcon
1HDD LED(+) HDD
LED
2Power LED (+) Power
LED
3HDD LED(-) 4Power LED (-)
5 Ground Reset
Buon
6Power Buon Power-On
Buon
7 Reset Control 8 Ground
9NC NC 10 NA NA
SPKR: Chassis Speaker Header
Please connect the chassis speaker to this header.
Pin Assignment
1 +5V
2N/A
3N/A
4 Speaker
TPM: Trusted Plaorm Module Header
This header allows you to store cryptographic keys that protect informaon.
Pin Assignment Pin Assignment
1 +1.8V 2 SPI_PIRQ
3TPM_RST# 4TPM_CS
5N/A 6N/A
7 +1.8V 8 GND
9N/A 10 SPI_CLK
11 SPI_MISO 12 SPI_MOSI
13 N/A 14 KEY

18 | Chapter 2: Hardware installaon
SATA_1/ SATA_2/ SATA_3/ SATA_4/ SATA_5/ SATA_6/ SATA_7/ SATA_8:
Serial ATA 6.0 Gb/s Connectors
These connectors connect to SATA hard disk drives via SATA cables.
Pin Assignment
1 Ground
2 TX+
3TX-
4 Ground
5RX-
6 RX+
7 Ground
F_USB32_A-5G: Header for USB 3.2 (Gen1) Ports at Front Panel
This header allows user to add addional USB ports on the PC front panel, and also can be
connected with a wide range of external peripherals.
Pin Assignment Pin Assignment
1VBUS0 11 D2+
2 SSRX1- 12 D2-
3 SSRX1+ 13 Ground
4 Ground 14 SSTX2+
5 SSTX1- 15 SSTX2-
6 SSTX1+ 16 Ground
7 Ground 17 SSRX2+
8 D1- 18 SSRX2-
9 D1+ 19 VBUS1
10 ID 20 Key
F_USB20_1/ F_USB20_2: Header for USB 2.0 Ports at Front Panel
This header allows user to add addional USB ports on the PC front panel, and also can be
connected with a wide range of external peripherals.
Pin Assignment
1+5V (fused)
2+5V (fused)
3USB-
4USB-
5USB+
6USB+
7 Ground
8 Ground
9Key
10 NC

Chapter 2: Hardware installaon | 19
B550MXC PRO
JSPDIFOUT1: Digital Audio-out Connector
The connector is for connecng the S/PDIF output bracket.
Pin Assignment
1 Ground
2SPDIF_OUT
3NA
4 +5V
F_AUDIO: Front Panel Audio Header
This header allows user to connect the chassis-mount front panel audio I/O which supports HD
and AC’97 audio standards.
HD Audio AC’97
Pin Assignment Pin Assignment
1Mic Le in 1 Mic In
2 Ground 2 Ground
3 Mic Right in 3 Mic Power
4 GPIO 4 Audio Power
5 Right line in 5 RT Line Out
6 Jack Sense 6 RT Line Out
7 Front Sense 7 Reserved
8Key 8Key
9Le line in 9LFT Line Out
10 Jack Sense 10 LFT Line Out
Note
»
»It is recommended that you connect a high-denion front panel audio module to this connector to
avail of the motherboard’s high denion audio capability.
»
»Please try to disable the “Front Panel Jack Detecon” if you want to use an AC’97 front audio output
cable. The funcon can be found via O.S. Audio Ulity.
COM1: Serial Port Connector
The motherboard has a serial port header for connecng RS-232 Port.
Pin Assignment
1 Carrier detect
2 Received data
3Transmied data
4 Data terminal ready
5 Signal ground
6 Data set ready
7 Request to send
8 Clear to send
9 Ring indicator
10 Key

20 | Chapter 2: Hardware installaon
12V_LED: RGB LED Device (5050 SMD) Header
This header providers 12V power and RGB control pins for RGB LED Device (5050 SMD).
Pin Cable Color Assignment
112V (Black) VCC12
2G (Green) LED_GREEN
3R (Red) LED_RED
4B (Blue) LED_BLUE
5V_LED1/ 5V_LED2: Addressable RGB LED Device (WS2818B) Header
This header providers 5V power and Data control pins for RGB LED Device (WS2818B).
Pin Assignment
1 VCC5
2Data
3N/A
4GND
Note
»
»Ensure proper pin connecng to your LED device, wrong connecon may damage your LED device or
motherboard.
»
»The 12V_LED connector supports to 5050 RGB LED strips with the maximum power rang of 3A (12V).
»
»The 5V_LED connector supports up to 300 LEDs WS2818B individually Addressable RGB LED strips
with the maximum power rang of 3A (5V).
»
»Please use the Vivid LED DJ soware to control the LEDs. For detailed soware seng informaon,
refer to chapter 3.3 .