Well-balanced 2020 ATX multi-purpose motherboard with AMD AM4 socket and mid-range B550 chipset. Designed to complete gaming systems, high-performance universal home PCs and entry-level workstations. Thanks to the reinforced PCI-E slot connector, it can work with massive and large-sized top-end discrete gaming video cards. It is positioned as a product of the middle price category.

Guaranteed compatible with AMD Ryzen 3000 (Matisse/Matisse Refresh, 7nm) and Ryzen 4000G (Renoir, 7nm) APUs. Unlike the previous generation models based on the B450 chipset), MSI B550-A PRO motherboard fully supports the high-speed PCI-E Gen 4.0 system interface, which allows you to 100% increase the speed of loading textures into progressive models of discrete graphics cards and speed up the exchange data with fast NVMe SSDs. With four DDR4 DIMM slots, you can install an impressive maximum total amount of RAM (up to 128 GB), which is more than enough for gaming, streaming and solving any household/professional tasks. It is also worth noting the presence of a high-speed network GbE LAN adapter Realtek 8111H and two digital video outputs (HDMI, DisplayPort).

All specifications

Specifications B550-A PRO

Main
Features	gaming for overclocking
Socket	AMD AM4
Form factor	ATX
VRM heatsink
Size (HxW)	305x244 mm


Chipset
Chipset	AMD B550
BIOS	Ami
UEFI BIOS


RAM
DDR4	4 slot(s)
Memory module	DIMM
Operation mode	2 channel
Max. clock frequency	4400 MHz
Max. memory	128 GB
XMP


Drive interface
SATA 3 (6Gbps)	6
M.2 connector	2
M.2	1xSATA/PCI-E 4x, 1xPCI-E 4x
M.2 SSD cooling
Integrated RAID controller	/ RAID 0, RAID 1 and RAID 10 /


Expansion slots
1x PCI-E slots	2
PCI-E 16x slots	2
PCI Modes	16x/4x
PCI Express	4.0
CrossFire (AMD)
Steel PCI-E connectors	/ PCI-E 4.0 /

Internal connections
TPM connector
USB 2.0	2
USB 3.2 gen1	1
USB C 3.2 gen1	1
RGB LED strip	3 / 2x3-pin RAINBOW LED, 1x4-pin RGB LED /


Video outputs
HDMI output
DisplayPort


Integrated audio
Audiochip	Realtek ALC892
Sound (channels)	7.1


Network interfaces
LAN (RJ-45)	1 Gbps
LAN ports	1
LAN controller	Realtek 8111H


External connections
USB 2.0	4
USB 3.2 gen1	2
USB 3.2 gen2	1
USB C 3.2 gen2	1
PS/2	1
BIOS FlashBack


Power connectors
Main power socket	24 pin
CPU power	8 pin
Fan power connectors	8
CPU Fan 4-pin	1
CPU/Water Pump Fan 4-pin	1
Chassis/Water Pump Fan 4-pin	6


Official Website	msi.com
Added to E-Catalog	May 2020

The information in the model description is for reference purposes.
Always clarify the specifications and configuration of the product with the online store manager before purchasing.
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	MSI B550-A PRO ProSeries Motherboard AMD AM4 DDR4 PCIe 40 SATA 6Gb/s M2 USB 32 Gen 2 HDMI/DP ATX Audio Boost rewards your ears with studio-quality audio for immersive gaming experiences.Premium Thermal Solution: 7W/mk heat... moresink thermal pad and 57g thick copper PCB.BIOS button allows users to flash BIOS even without CPU or memory.Powerful Design: Core Boost, Digital PWM IC, 56.7g thickened copper PCB, Creator Genie, DDR4 Boost Supports DDR4 memory, up to 4400 MHz (OC) Quick Experience: PCIe 4.0, Lightning Gen4 x4 M.2 with M.2 Shield Frozr, AMD Turbo USB 3.2 Gen 2 Premium Thermal Solution: Extended heatsink with extra thermal pad and 7W/mK buffer, and M.2 Shield Frozr are designed for high performance system and non-stop work Powerful Design: Core Boost, Digital PWM IC, 56.7g PCB, Creator Genie, DDR4 Boost Amazon.co.uk Delivery: to United Kingdom Report	£111.52 Buy in shop

	MSI B550-A PRO motherboard AMD B550 Socket AM4 ATX MSI B550-A PRO motherboard AMD B550 Socket AM4 ATX ComputersDeal.com Delivery: in United Kingdom Report	£114.10 Buy in shop

	MSI B550-A PRO motherboard AMD B550 Socket AM4 ATX PRO series helps users work smarter by delivering an efficient and productive experience. Featuring stable functionality and... morehigh-quality assembly PRO series motherboards provide not only optimized professional workflows but also less troubleshooting and longevity. USER FRIENDLY DESIGN MSI motherboards feature tons of convenient and smart design for DIY users countless system tuning and troubleshooting tools are at your disposal to push your system to new heights and satisfy even the most demanding tweaker. Makes it so easy to install your own motherboard without any issue. THERMAL SOLUTION FOR MORE CORES AND HIGHER PERFORMANCE With more cores processors thermal and power design is more important to make sure the temperature keeps lower. MSI extended PWM heatsink with 7W/mK thermal pad ensures even high-end processors to run in full speed with MSI motherboards. M.2 SHIELD FROZR Worlds fastest SSDs can start to lower performance when getting hot. Part of the motherboards heatsink design M.2 SHIELD FROZR is the next generation M.2 thermal solution to avoid this by offering the best thermal protection to make sure that SSD maintains maximum performance. FULLY CONTROLLABLE IN BIOS AND SOFTWARE MSI motherboards let you manage speeds and temperatures for all your system and CPU fans. Total Fan Control allows you check your primary system characteristics in a simplified graphical interface. You can also set up to 4 temperature targets for CPU and motherboard which will adjust the fan speeds automatically. OPTIMIZED FOR WATER COOLING Designed to support the most popular All-In-One & customized water cooling solutions on the market. A dedicated water pump PIN header supports up to 3 amp giving you full control of the water pump speed. A clearly marked keep-out-zone allows for easy and safe installation and a perfect fit. EASY BIOS RECOVERY WITH FLASH BIOS BUTTON Run into trouble when updating your BIOS? Simply flash the old BIOS version back and continue working within minutes with Flash BIOS Button. Flash BIOS Button even works without a CPU memory or graphics card installed! EZ DEBUG LED Run into trouble? Onboard LEDs for key components will indicate the source of the problem so you know exactly where to look to get up and running again. XL CLIP The enlarged PCI-E clip helps you swap or remove your devices easier. Keep the PCI-E slot stronger and safer. EASY TO ARRANGE YOUR CABLES Not clever at cable arrangement? MSI Atypical PCB design not only the identity of stylish but also makes SATA and USB cable routing easier. Arranges cable neatly even you are not familiar with system build. FORTIFY YOUR SYSTEM WITH PCI-E STEEL ARMOR MSI PCI Express Steel Armor slots are secured to the motherboard with extra solder points and support the weight of heavy graphics cards. When every advantage in games counts Steel Armor shields the point of contact from electromagnetic interference. ULTIMATE MOTHERBOARD PROTECTION Double Quzo.co.uk Delivery: to United Kingdom Report	£104.50 Buy in shop

	MSI B550-A PRO ATX Motherboard for AMD AM4 CPUs B550-A PRO exclusive features... moreFlash BIOS Button Simply use a USB key to flash any BIOS within seconds, without installing a CPU, memory or graphics card. Core Boost Technology Combining premium layout design, that is ready for unleashing the maximum performance. 2oz Thickened Copper PCB An enhanced PCB design improves heat dissipation and performance reliability. Digital PWM Highest quality component digital power IC makes sure your system runs smoothly under the most extreme conditions. PCIe Steel Armor Protecting VGA cards against bending and EMI for better performance, stability and strength. B550-A PRO PREMIUM THERMAL SOLUTION 7W/mK Thermal Pad Preminum 7W/mK thermal pad covered both MOSFET and chokes, provides better heat transfer to the heatsink. Extended Heatsink MSI extended PWM heatsink and enhanced circuit design ensures even high-end processors to run in full speed. CCLonline.com Delivery: to United Kingdom Report	£102.99 Buy in shop

	MSI B550-A PRO AMD Ryzen B550 ATX DDR4 Motherboard - Socket AM4 Featuring stable functionality and high-quality assembly, PRO series motherboards provide not only less troubleshooting but a... morelso optimized professional workflows and longevity. Awd-it.co.uk Delivery: to United Kingdom Report	£133.99 Buy in shop