SOYO B550M Micro-ATX Motherboard - AM4, DDR4 up to 64GB XMP, PCIe 4.0 x16, Dual M.2, 4x SATA3, HDMI 2.0 + VGA, 4x USB 3.2, Gigabit LAN, ARGB, Overclocking Support

SOYO B550M Micro-ATX Motherboard. Socket: AM4. Chipset: AMD B550. Form Factor: Micro-ATX (195x216mm). RAM: DDR4 Dual-Channel, 2 Slots, Up to 64GB, 2133-3600MHz+, XMP Support. PCIe: 1x PCIe 4.0 x16 + 1x PCIe 3.0 x1 + 1x Wi-Fi Slot (PCIe). Storage: 2x M.2 (PCIe 4.0 x4 + PCIe 3.0 x4) + 4x SATA3. Display: HDMI 2.0 + VGA. Back I/O USB: 4x USB 3.2 Gen1 (5Gbps) + 4x USB 2.0. LAN: Realtek Gigabit Ethernet. Audio: Realtek ALC897 HD. Headers: 3x 5V 3-Pin ARGB + CPU Fan + 2x SYS Fan + F_Audio + USB 2.0 + USB 3.0 + COM + Debug + CLR CMOS. Power: 24-Pin + 8-Pin ATX. Overclocking Supported. Requires 500W+ PSU. CMOS Battery Not Included. Pre-Shipment Tested. Ships from United States.

The SOYO B550M is a Micro-ATX motherboard on the AMD AM4 platform with the B550 chipset, supporting AMD Ryzen 3000, 4000, 4000G, 5000, and 5000G series processors. It provides PCIe 4.0 x16 for a discrete GPU, two M.2 slots (the primary at PCIe 4.0 x4 for maximum NVMe SSD performance), four SATA3 ports, dual-channel DDR4 up to 64GB with XMP support and overclocking capability, HDMI 2.0 and VGA display outputs, four USB 3.2 Gen1 ports plus four USB 2.0 ports, Realtek Gigabit LAN, Realtek ALC897 HD audio, and three 5V 3-pin ARGB headers for addressable RGB lighting. Size is 195x216mm (Micro-ATX). Tested before shipment. CMOS battery not included. Requires a 500W or higher rated power supply.

Critical notes before purchasing:

• CMOS battery (CR2032) not included - the battery is removed before shipping due to logistics restrictions; purchase a CR2032 coin cell battery separately - it is required for the motherboard to retain BIOS settings when the system is powered off; available at any hardware or electronics store for under $2
• Requires 500W+ rated power supply minimum - a quality branded PSU at 500W or higher is recommended; budget or unbranded PSUs below this rating risk system instability, unexpected shutdowns, or damage to components
• CPU not included - this is a motherboard only; pair with an AM4 Ryzen processor (Ryzen 3000 non-G, 4000, 4000G, 5000, or 5000G series)
• RAM not included - requires DDR4 DIMMs; the board has 2 slots supporting up to 64GB total (2x 32GB); DDR5 RAM is not compatible
• Wi-Fi not built in - the board has a PCIe Wi-Fi slot (M.2 Key E or PCIe protocol) for an optional Wi-Fi card, but Wi-Fi is not included; Gigabit LAN is built in for wired ethernet
• Onboard display outputs (HDMI 2.0 + VGA) require a Ryzen G-series APU (such as 4650G, 5600G) to function; non-G Ryzen CPUs (3600, 5700X, etc.) have no integrated graphics and require a discrete GPU for display output

Key Features

• AM4 socket - AMD B550 chipset - Ryzen 3000/4000/5000 support - The AM4 socket is compatible with AMD Ryzen processors from the 3000 series (Zen 2) through the 5000 series (Zen 3), covering the full range of current-generation AMD desktop CPUs; confirmed compatible examples include R5-3600, R5-4650G, R5-5600G, R7-5700X, R7-5700X3D; the B550 chipset supports PCIe 4.0 on the primary x16 slot and primary M.2 slot while using PCIe 3.0 on secondary slots and chipset-connected peripherals; B550 enables overclocking with compatible Ryzen processors (Ryzen 5000 and unlocked Ryzen 3000 models)
• DDR4 dual-channel - 64GB max - XMP - 2133 to 3600MHz+ - Two DDR4 DIMM slots operating in dual-channel mode for higher memory bandwidth than single-channel; supports standard DDR4 speeds from 2133MHz to 3200MHz natively and up to 3600MHz and beyond with XMP (Extreme Memory Profile) overclocking enabled in BIOS; maximum capacity is 64GB using two 32GB DIMMs; XMP lets you run DDR4 kits at their advertised speed (e.g., a 3600MHz DDR4 kit runs at 3200MHz by default on B550 and needs XMP enabled to reach 3600MHz); DDR5 is not compatible with this board
• PCIe 4.0 x16 slot - PCIe 3.0 x1 slot - Wi-Fi slot - The primary x16 slot operates at PCIe 4.0 bandwidth (64 GB/s), suitable for current-generation AMD and NVIDIA discrete GPUs; PCIe 4.0 doubles the bandwidth of PCIe 3.0 x16 and is backward compatible with PCIe 3.0 GPUs at PCIe 3.0 speeds; the PCIe 3.0 x1 slot accepts sound cards, USB expansion cards, and other x1 add-in cards; the Wi-Fi slot (PCIe protocol M.2 Key E or similar) accepts an optional Wi-Fi/Bluetooth card for wireless connectivity
• Dual M.2 slots - 2x NVMe + 4x SATA3 - The primary M.2 slot (CN2) operates at PCIe 4.0 x4 (up to ~7 GB/s read for PCIe 4.0 NVMe SSDs) and also supports SATA M.2 drives; the secondary M.2 slot (CN3) operates at PCIe 3.0 x4 (up to ~3.5 GB/s for PCIe 3.0 NVMe SSDs); both slots use the standard M.2 2280 form factor; four additional SATA3 ports support traditional 2.5" or 3.5" SATA SSDs and HDDs for expanded storage
• Back I/O: HDMI 2.0 + VGA + 4x USB 3.2 Gen1 + 4x USB 2.0 + Gigabit LAN + audio - HDMI 2.0 supports up to 4K 60Hz display output (requires G-series APU); VGA (D-Sub) provides legacy monitor compatibility; four USB 3.2 Gen1 ports at 5 Gbps for fast external storage and peripherals; four USB 2.0 ports for keyboards, mice, and other standard peripherals; Realtek Gigabit Ethernet for wired network at up to 1 Gbps; audio I/O: Line Out, Mic In, and Line In 3.5mm jacks via Realtek ALC897 HD Audio
• 3x 5V 3-Pin ARGB headers + fan headers - Three 5V 3-pin addressable RGB headers support ARGB lighting strips, fans, and accessories for synchronized lighting control; one CPU fan header and two system fan headers provide fan speed control; the F_Audio internal header connects a case's front audio panel; COM and Debug headers serve advanced users and system builders

Specifications

• Brand: SOYO
• Form Factor: Micro-ATX (195x216mm)
• Socket: AM4
• Chipset: AMD B550
• CPU Support: Ryzen 3000 (non-G), 4000, 4000G, 5000, 5000G series
• RAM: DDR4, 2 slots, dual-channel, up to 64GB (2x32GB), 2133-3600MHz+, XMP
• PCIe: 1x PCIe 4.0 x16, 1x PCIe 3.0 x1, 1x Wi-Fi slot
• M.2: 2x (PCIe 4.0 x4/SATA3 + PCIe 3.0 x4)
• SATA: 4x SATA3
• Display Out: HDMI 2.0 + VGA (requires APU)
• USB (Back I/O): 4x USB 3.2 Gen1 (5Gbps) + 4x USB 2.0
• LAN: Realtek Gigabit Ethernet (RJ45)
• Audio: Realtek ALC897 HD (Line Out, Mic In, Line In)
• ARGB Headers: 3x 5V 3-Pin
• Fan Headers: 1x CPU + 2x SYS (4-pin)
• Power: 24-pin + 8-pin ATX
• Overclocking: Supported
• CMOS Battery: Not included (CR2032, purchase separately)
• Min PSU: 500W rated (quality brand recommended)
• Operating Temp: -20°C to 60°C
• Ships From: United States

Frequently Asked Questions

Which AMD Ryzen CPUs are compatible with this B550M motherboard?
This board supports AMD Ryzen processors on the AM4 socket across the following generations: Ryzen 3000 series (Zen 2, non-G variants such as R5-3600, R7-3700X - G-series 3000 APUs like the 3400G are not supported on B550); Ryzen 4000G series (APUs such as R5-4650G, R7-4750G - these are APU-only models with integrated graphics); Ryzen 5000 series (Zen 3, such as R5-5600, R5-5600X, R7-5700X, R7-5700X3D, R9-5900X); and Ryzen 5000G series (APUs such as R5-5600G, R7-5700G). Ryzen 7000 series processors (AM5 socket) are not compatible - AM5 is a different physical socket. Before installing an older Ryzen 3000 non-G CPU, verify whether a BIOS update is needed - on a new board shipped with an older BIOS version, a Ryzen 5000-series CPU may be required for initial boot to update the BIOS for Ryzen 3000 compatibility. Contact the seller to confirm the BIOS version shipped with the board if you plan to use a Ryzen 3000 CPU.

Why is the CMOS battery not included and where do I get one?
The CMOS battery (a CR2032 coin cell) powers the motherboard's real-time clock and BIOS settings memory when the system is fully powered off and unplugged. It is a standard component present on all desktop motherboards. This board ships without a CMOS battery because lithium batteries are restricted or require special handling under international shipping logistics regulations - the battery is removed before shipment to comply with carrier requirements. You need to install a CR2032 battery before using the board. A CR2032 is a universal coin cell battery available at any hardware store, electronics retailer, drugstore, or supermarket for approximately $1-3. Without the battery installed, the motherboard will lose its BIOS settings (date, time, boot order, XMP profile, overclocking settings) every time the system is unplugged from the wall. Installing the battery takes approximately 5 seconds - slide it into the coin cell holder on the motherboard with the positive (+) side facing up.

Do the HDMI and VGA outputs work with all Ryzen processors?
No - the onboard HDMI 2.0 and VGA display outputs on the rear I/O panel only function when using a Ryzen G-series APU (a processor with integrated Radeon graphics). Examples of compatible APUs for onboard display: R5-4650G, R7-4750G, R5-5600G, R7-5700G. Non-G Ryzen CPUs (such as R5-3600, R5-5600X, R7-5700X, R9-5900X) have no integrated graphics - with these CPUs, the HDMI and VGA outputs on the motherboard are completely non-functional and you must install a discrete GPU (graphics card) in the PCIe 4.0 x16 slot to get a display output. This is a standard characteristic of all AMD non-APU Ryzen processors and B550 motherboards - it is not a defect. If you plan to build without a discrete GPU (relying on onboard graphics), choose a Ryzen G-series APU.

What is the difference between the two M.2 slots and which should I use for my primary NVMe SSD?
The two M.2 slots have different performance levels. The primary slot (CN2) connects directly to the Ryzen CPU via PCIe 4.0 x4, delivering up to approximately 7,000 MB/s read speed with a PCIe 4.0 NVMe SSD (such as the Samsung 980 Pro, WD Black SN850X, or Seagate FireCuda 530); it also accepts SATA M.2 drives at SATA3 speeds (~550 MB/s). The secondary slot (CN3) connects via PCIe 3.0 x4 and delivers up to approximately 3,500 MB/s read speed with a PCIe 3.0 NVMe SSD (such as the Samsung 970 EVO Plus or WD Blue SN570); it also accepts SATA M.2 drives. Always install your primary OS drive (Windows drive) in the CN2 slot for maximum performance. Use CN3 for a secondary storage drive. A PCIe 4.0 NVMe SSD in CN2 will not perform at PCIe 4.0 speeds if installed in CN3 - the slot physically accepts the drive but runs it at PCIe 3.0 bandwidth.

What power supply do I need for this motherboard and what are the connector requirements?
The motherboard requires a power supply with a 24-pin ATX main connector and an 8-pin CPU power connector (also labeled EPS12V or ATX12V 8-pin) - both are standard on any modern ATX power supply. The minimum recommended PSU rating is 500W from a quality branded manufacturer (Corsair, Seasonic, EVGA, be quiet!, Fractal Design, Antec, and similar). The actual power draw depends heavily on the CPU and GPU installed: a system with a mid-range Ryzen 5 CPU and no discrete GPU draws approximately 150-250W under load; adding a mid-range GPU (such as an RTX 4060 or RX 7600) adds 100-150W more; a high-end GPU (RTX 4090, RX 7900 XTX) can add 300-450W. As a general rule: choose a PSU rated at least 100-150W above your estimated peak load for efficiency and headroom. Avoid no-brand or unrated PSUs regardless of their stated wattage - an unstable PSU is a leading cause of system crashes, data loss, and component damage.