MSI MEG B550 UNIFY-X Quick Start

37
Onboard LEDs
Hexadecimal Character Table
Hexadecimal 0 1 2 3 4 5 6 7 8 9 A B  D E F

LED display
0 1 2 3 4 5 6 7 8 9 A B C D E F
Boot Phases
Security (SEC) – initial low-level initialization
Pre-EFI Initialization (PEI) – memory initialization
Driver Execution Environment (DXE) – main hardware initialization
Boot Device Selection (BDS)

Debug Code LED Table
SEC Progress Codes
01 
02 AP initialization before microcode loading
03 System Agent initialization before microcode loading
04 
06 Microcode loading
07 AP initialization after microcode loading
08 System Agent initialization after microcode loading
09 
0B 
SEC Error Codes
0C - 0D 
0E Microcode not found
0F Microcode not loaded
PEI Progress Codes
10 
11 
12 - 14 
15 Pre-memory System Agent initialization is started
16 - 18 
19 
1A - 1C 
2B 
2C Memory initialization. Memory presence detection
2D Memory initialization. Programming memory timing information

MSI MEG B550 UNIFY-X Specifications

General

Processor socket	Socket AM4
Processor manufacturer	AMD
Compatible processor series	AMD Ryzen 3, AMD Ryzen 5, AMD Ryzen 7, AMD Ryzen 9 3rd Gen
Non-ECC	Yes
Memory channels	Dual-channel
Memory slots type	DIMM
Number of memory slots	2
Supported memory types	DDR4-SDRAM
Maximum internal memory	64 GB
Supported memory clock speeds	5800, 5300, 1866, 2133, 2400, 2667, 2800, 2933, 3000, 3066, 3200, 3466, 3600, 3733, 3866, 4000, 4133, 4266, 4400, 4600, 4733, 4800, 4866, 5000, 5100 MHz
RAID levels	0, 1, 10
Number of storage drives supported	10
Supported storage drive interfaces	M.2, SATA III
DirectX version	12.0
Maximum resolution	4096 x 2160 pixels
Maximum graphics card memory	16384 MB
Parallel processing technology support	2-Way CrossFireX
Number of SATA II connectors	0
Number of SATA III connectors	6
USB 3.2 Gen 2 (3.1 Gen 2) connectors	1
Headphone outputs	5
USB connector type	USB Type-A, USB Type-C
USB 2.0 ports quantity	4
USB 3.2 Gen 2 (3.1 Gen 2) Type-A ports quantity	3
LAN controller	Realtek RTL8125B
Wi-Fi standards	802.11a, 802.11b, 802.11g, Wi-Fi 4 (802.11n), Wi-Fi 5 (802.11ac), Wi-Fi 6 (802.11ax)
Bluetooth version	5.1
Top Wi-Fi standard	Wi-Fi 6 (802.11ax)
WLAN controller model	Intel Wi-Fi 6 AX200
Ethernet interface type	2.5 Gigabit Ethernet
Audio chip	Realtek ALC1220P
Component for	PC
Motherboard chipset	AMD B550
PC health monitoring	FAN, Temperature
Audio output channels	7.1 channels
Motherboard form factor	ATX
Windows operating systems supported	Windows 10 x64
BIOS type	UEFI AMI
ACPI version	6.1
BIOS memory size	256 Mbit
System Management BIOS (SMBIOS) version	2.8
Cables included	SATA
Harmonized System (HS) code	84733020
Weight	1000 g

Weight and Dimensions

Depth	244 mm
Width	304 mm
Height	65 mm