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Msi B550M A Pro Motherboard

4099 EGP

Part Number: 911-7C96-040
Socket: AMD AM4
Chipset: AMD B550
Form Factor: Micro-ATX
Memory Support: Dual Channel DDR4, up to 64GB (2× DIMM)
Expansion Slots: 1× PCIe 4.0/3.0 x16, 1× PCIe 3.0 x1
Storage: 4× SATA III, 1× M.2 slot (PCIe Gen4 x4)
Rear I/O: HDMI, DVI-D, 4× USB 3.2 Gen1 Type-A, 2× USB 2.0, 3× Audio, Serial Port
Audio: Realtek ALC892/ALC897 Codec
Warranty: 3 Years

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SKU: 824142225257 Categories: MOTHERBOARD, AMD Motherboards Tags: micro-ATX, PRO, 911-7C96-040, gaming, RYZEN, 824142225257, DVI-D, DDR4, motherboard, msi, HDMI, Pcie 4.0, AM4, M.2, B550, B550M, SATA, A, AMD Brand: MSI

MSI B550M A Pro Motherboard

The MSI B550M A Pro Motherboard facilitates reliable, future-proof platform performance with PCIe 4.0 support for mainstream AMD builds. Specifically engineered for professionals who demand stable connectivity and upgrade flexibility in a compact form factor, it bridges the gap between complexity and reliable performance.

AM4

Socket

PCIe 4.0

Support

64GB

Memory

Local Warranty

Why the MSI B550M A Pro is the Elite Choice for Professionals

Future-Proof PCIe 4.0 Architecture

The primary PCIe x16 slot supports PCIe 4.0 when paired with Ryzen 3000/5000 series processors, delivering double the bandwidth of PCIe 3.0 for next-generation graphics cards and NVMe SSDs—ensuring your build remains competitive as technology advances.

Compact Micro-ATX Reliability

Despite its compact Micro-ATX form factor, this motherboard maintains comprehensive connectivity with dual M.2 slots, four SATA III ports, and robust power delivery—making it ideal for space-constrained professional workstations that require full functionality without compromise.

Comprehensive Technical Specifications

Feature	Detailed Specification
Model Name	MSI B550M A Pro Motherboard
Model Number	911-7C96-040
Form Factor	Micro-ATX (24.4 × 24.4 cm)
Socket	AMD Socket AM4
Chipset	AMD B550
CPU Support	AMD Ryzen 5000/4000/3000 series, Ryzen with Radeon Graphics, 2nd/1st Gen Ryzen, Athlon with Radeon Graphics
Memory Slots	2× DDR4 DIMM slots
Memory Support	Dual channel up to 64GB, DDR4-4400+ (OC), DDR4-4266+ (OC), DDR4-4133+ (OC), DDR4-4000+ (OC)
PCIe Slots	1× PCIe 4.0/3.0 x16 (supports x16), 1× PCIe 3.0 x1
M.2 Slots	1× M.2 slot (Key M, supports PCIe 4.0/3.0 x4 and SATA)
SATA Ports	4× SATA III (6 Gb/s)
RAID Support	RAID 0, 1, 10
USB Ports	Rear: 4× USB 3.2 Gen1 Type-A, 2× USB 2.0 Type-A Front: 2× USB 3.2 Gen1, 4× USB 2.0
Video Outputs	1× HDMI, 1× DVI-D
Audio	Realtek ALC892/ALC897 codec, 3.5mm audio jacks
Networking	1× Gigabit LAN (Realtek RTL8111H)
TPM	TPM header (firmware TPM supported)
Operating System	Windows 10 64-bit
Warranty	3 Year Limited Warranty

FAQ

Does this motherboard support PCIe 4.0 with all Ryzen processors?

PCIe 4.0 support requires a Ryzen 3000 series (Zen 2) or newer processor. When using 1st or 2nd generation Ryzen CPUs (Zen/Zen+), the primary PCIe x16 slot will operate at PCIe 3.0 speeds. The B550 chipset itself supports PCIe 4.0, but the CPU determines the actual implementation.

How many M.2 slots does this motherboard have?

This motherboard features one M.2 slot that supports both PCIe 4.0/3.0 x4 NVMe SSDs and SATA M.2 drives. The single M.2 slot shares bandwidth with SATA ports 3 and 4, so using an M.2 SATA drive will disable those two SATA ports.

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MOTHERBOARD

MODEL	B550M-A PRO
CHIPSET MANUFACTURERS	AMD
CPU Socket	AM4
Motherboard Chipset	B550
Motherboard Type	Micro ATX
CPU SERIES	AMD Ryzen 5000 Series/5000 G-Series/4000 G-Series/3000 Series/3000 G-Series/2000 Series/2000 G-Series
Technology	DDR4
Memory Speed	Not Specified
Max Memory Size	64 GB
Memory Slot	2
PCI-E X16	YES
PCI-E GEN	PCIe 4.0
PCI-E Slots (M.2)	1
SATAIII	4x SATA 6.0 Gb/s
Communication module	Not Specified
Part Number	911-7C96-040
Warranty	3 Years