ASRock B850M Pro-A (90-MXBR8-A0UAYZ)

Name: ASRock B850M Pro-A 90-MXBR8-A0UAYZ
Brand: ASRock
Price: 120.02 GBP
Availability: InStock

ASRock B850M Pro-A

+ Wi-Fiwithout Wi-Fi

2025 Pro M.2 cooling no backlight 2.5 Gbps

Towards:home / office

Form Factor:micro-ATX

Socket:AMD AM5

Chipset:AMD B850

BIOS:Ami

RAM slots:DDR5 4 sl

RAM form factor:DIMM

RAM clock:8000 MHz

Sound (channels):7.1

Connectors:HDMI, M.2

Additional connectors:DisplayPort

Power connector:24-pin

Processor power:8+4-pin

Compact microATX motherboard based on the AMD B850 chipset. It belongs to the mid-range class and is part of the ASRock Pro lineup for 2025, offering a practical solution for creating compact mid-level systems with modern expansion capabilities at an affordable price. With support for socket AM5, it ensures full compatibility with Ryzen 9000/8000/7000 series processors, while the 8+2+1-phase power system with Dr.MOS transistors is perfect for installing mid-budget processors like Ryzen 5/Ryzen 7 under moderate loads.

Notable features of the ASRock B850M Pro-A include support for DDR5 memory with overclocking capabilities in four DIMM slots using Dual Channel technology, which enhances bandwidth. The board is equipped with four slots for DDR5 RAM with a maximum frequency exceeding 8000 MHz and supports AMD EXPO profiles, allowing the user to quickly and easily overclock memory to optimal levels.

The storage system includes one M.2 Gen5 slot for high-speed NVMe drives and two M.2 Gen4 slots for mid-range SSDs, as well as four SATA3 ports for connecting traditional drives. As for connectivity, the board features one PCI-E 5.0 x16 slot for a graphics card and an additional PCI-E 4.0 slot for expansion cards. Video outputs include HDMI and DisplayPort connectors. Additional features include a Realtek 2.5G LAN controller for high-speed wired connection and an M.2 Key E slot for Wi-Fi module installation. An alternative model with pre-installed Wi-Fi is also available in the market.

All specifications

Specifications B850M Pro-A

Main
Features	for home/office
Socket	AMD AM5
Form factor	micro-ATX
Power phases	11 / 8+2+1 /
VRM heatsink
Size (HxW)	244x244 mm


Chipset
Chipset	AMD B850
BIOS	Ami
UEFI BIOS


RAM
DDR5	4 slot(s)
Memory module	DIMM
Operation mode	2 channel
Max. clock frequency	8000 MHz
Max. memory	256 GB
XMP
EXPO support


Drive interface
SATA 3 (6Gbps)	4
M.2 connector	3
M.2	3xPCI-E 4x
M.2 version	1x5.0, 2x4.0
M.2 SSD cooling
Integrated RAID controller


Expansion slots
PCI-E 4x slots	1
PCI-E 16x slots	1
PCI Express	5.0
Steel PCI-E connectors

Internal connections
TPM connector
USB A 2.0	2 pcs
USB A 5Gbps (3.2 gen1)	2 pcs
USB C 5Gbps (3.2 gen1)	1 pcs
ARGB LED strip	3
RGB LED strip	1


Video outputs
HDMI output
HDMI version	v.2.1
DisplayPort
DisplayPort version	v.1.4


Integrated audio
Audiochip	Realtek ALC897
Sound (channels)	7.1


Network interfaces
LAN (RJ-45)	2.5 Gbps
LAN ports	1
LAN controller	Dragon RTL8125BG


External connections
USB 2.0	4
USB A 5Gbps (3.2 gen1)	2 pcs
USB A 10Gbps (3.2 gen2)	1 pcs
USB C 10Gbps (3.2 gen2)	1 pcs
BIOS FlashBack


Power connectors
Main power socket	24-pin
CPU power	8+4-pin
Fan power connectors	5
CPU Fan 4-pin	2
Chassis/Water Pump Fan 4-pin	3


Official Website	asrock.com
Added to E-Catalog	January 2025
P/N	90-MXBR8-A0UAYZ

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.
Catalog ASRock 2026 - new arrivals, bestsellers, and the most relevant models ASRock.

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	Asrock B850M PRO-A 4711581490390 Pinntech.co.uk Delivery: in United Kingdom Report	£99.78 Buy in shop

	Asrock 90-MXBR8-A0UAYZ ASRock B850M Pro-A MotherboardUnlock next-generation performance with the ASRock B850M Pro-A, a masterfully engineered mother... moreboard designed to be the solid foundation of your modern PC build. Built for the advanced AMD Socket AM5 platform, this motherboard is optimized to harness the full potential of AMD Ryzen™ 7000 and the upcoming 8000 series processors. Whether you are a dedicated gamer, a content creator, or a professional seeking a reliable and powerful system, the B850M Pro-A delivers a perfect balance of cutting-edge features, stability, and value in a versatile Micro ATX form factor.Key Benefits:Experience a new era of computing with a motherboard that is built for the future. The ASRock B850M Pro-A provides robust power delivery to ensure your CPU runs at peak performance under any load, from intense gaming sessions to demanding computational tasks. Its support for blazing-fast DDR5 memory allows for unprecedented data transfer rates, significantly reducing loading times and enhancing multitasking capabilities. The compact Micro ATX design offers excellent compatibility with a wide range of chassis, making it the ideal choice for both space-conscious and full-featured builds without compromising on essential expansion options. With a focus on core performance, this board is perfect for users who prefer a stable, high-speed wired network connection for lag-free online gaming and dependable data transfers.Main Features:The ASRock B850M Pro-A is packed with essential technologies to elevate your computing experience. It features a robust power phase design to provide clean and efficient power to the latest high-core-count AMD processors. Memory support is future-proofed with dual-channel DDR5 architecture, offering exceptional bandwidth and performance. For storage, the board is equipped with multiple high-speed M.2 slots for your NVMe SSDs, ensuring lightning-fast boot times and application loading. It also maintains flexibility with support for M.2 SATA drives and traditional SATA 6Gb/s ports for your hard drives and 2.5-inch SSDs. The primary PCIe x16 slot is reinforced and ready for the latest high-performance graphics cards, while additional slots provide room for expansion. High-definition audio and a fast Ethernet port round out a feature set focused on delivering a stable, responsive, and immersive user experience.Technical Specifications:* CPU Support: AMD Socket AM5 for Ryzen™ 7000 & 8000 Series Processors* Chipset: AMD B850* Form Factor: Micro ATX (9.6-in x 9.6-in, 24.4 cm x 24.4 cm) * 4 x DDR5 DIMM Slots * Dual Channel DDR5 Memory Technology * Supports Extreme Memory Profile (XMP) and EXPO * Max. capacity of system memory: 192GB * 1 x Blazing M.2 Socket (PCIe Gen5x4) * 1 x Hyper M.2 Socket (PCIe Gen4x4), supports M.2 SATA type 2280 SSD * 4 x SATA 6Gb/s Connectors * 1 x PCIe 5.0 x16 Slot (PCIE1) * 1 x PCIe 4.0 x4 Slot (PCIE2) * 1 x M.2 Socket (Key E), for WiFi/BT module (No Connectivity module included)* LAN: 2.5 Gigabit LAN Tradeinn.com Delivery: in United Kingdom Report	£106.99 Buy in shop

	ASROCK B850M PRO-A AM5 Micro ATX Motherboard ASRock B850M PRO-A Micro ATX Motherboard The ASRock B850M PRO-A is a high-performance Micro ATX motherboard designed for dis... morecerning PC builders seeking a robust and feature-rich platform for their next AMD Ryzen system. Whether you're a gamer demanding peak performance, a content creator needing reliable stability, or a professional prioritizing efficiency, this motherboard delivers. Its comprehensive feature set, including cutting-edge connectivity and advanced power delivery, ensures a smooth and powerful computing experience. Features Supports AMD Socket AM5 Ryzen 7000, 8000, and 9000 Series Processors Robust 8+2+1 Phase Power Design with Dr.MOS for superior power delivery and stability Quad-channel DDR5 memory support with speeds up to 8000+ MHz (OC) High-speed storage options: Blazing M.2 (PCIe Gen5 x4), and two Hyper M.2 slots (PCIe Gen4 x4) Comprehensive connectivity: 2.5G LAN, USB 3.2 Gen2 Type-C and Type-A ports, multiple USB 3.2 Gen1 and USB 2.0 ports Dual graphics output: HDMI and DisplayPort Supports BIOS Flashback for easy BIOS updates Advanced cooling solutions including aluminum heatsinks and PWM/DC fan support with Fan-Tastic Tuning Supports Polychrome RGB and SignalRGB for customizable lighting effects Specifications Chipset: AMD B850 Socket: AM5 Form Factor: Micro ATX Memory: 4 x DDR5 DIMMs, Dual Channel, up to 8000+ MHz (OC) PCIe Slots: 1 PCIe 5.0 x16, 1 PCIe 4.0 x4, 1 M.2 Key E for WiFi M.2 Slots: 1 Blazing M.2 (PCIe Gen5 x4), 2 Hyper M.2 (PCIe Gen4 x4) SATA: 4 SATA3 USB: 1 USB 3.2 Gen2 Type-C (Rear), 1 USB 3.2 Gen2 Type-A (Rear), 1 USB 3.2 Gen1 Type-C (Front), 6 USB 3.2 Gen1 (2 Rear, 4 Front), 8 USB 2.0 (4 Rear, 4 Front) LAN: Realtek 2.5G LAN Audio: Realtek ALC897 7.1 CH HD Audio Codec Graphics Output: 1 HDMI, 1 DisplayPort Other Features: BIOS Flashback, Auto Driver Installer ICPC computers Delivery: in United Kingdom Report	£118.14 Buy in shop

	Asrock B850M Pro-A AMD B850 Socket AM5 micro ATX B850MPRO-A Optimized for stability durability and efficiency. It combines reliable performance user-friendly features and streamlined st... moreyle for daily computing tasks. Optimized VRM Design 8+2+1 Power Phase Design Featuring sturdy components and completely smooth power delivery to the CPU offering enhanced performance for gamers. Dr. MOS Dr.MOS is the integrated power stage solution which is optimized for synchronous buck-set down voltage applications! Compared to traditional discrete MOSFETs it intelligently delivers higher current for each phase thus providing improved thermal result and superior performance. Power Connector Hi-Density Power Connector CPU overclocking requires higher current. ASRock Hi-Density Power Connectors are designed to withstand higher currents compared to traditional CPU and ATX power connectors providing a more stable system and reducing the risk of fire during heavy overclocking. 6 Layer PCB The 6 Layer PCB provides stable signal traces and power shapes delivering lower temperature and higher energy efficiency for memory overclocking! Thus it's able to support the latest memory modules with most extreme memory performance! DDR5 XMP & EXPO Support Derived from the built for stable and reliable designing concept ASRock does not compromise on any details. This motherboard is built with high quality materials enthusiasts are able to enjoy the boost of DDR5 memory overclocking performance by enabling the pre-tested profiles. Make sure the memory modules are Intel XMP/AMD EXPO capable and overclocking can be made so affordable satisfying and absolutely no sweat at all. High Speed M.2 Solution PCIe Gen5 Blazing M.2 The Blazing M.2 accommodates the latest PCI Express 5.0 standard to perform twice the bandwidth compared to previous generation with a breathtaking 128Gb/s transfer speed it is ready to unleash the full potential of future ultrafast SSDs. Hyper M.2 Gen4 x4 Supports PCI Express 4.0 M.2 SSDs it is capable of perform twice the speed compared to previous 3rd generation giving a lightning fast data transferring experience. Cooling Intelligent Cooling Design Aluminum Heatsink The first thing that catches the eye is the optimized Aluminum Heatsink Design. Heatsinks are crucial for efficient heat dissipation especially during heavy workloads like gaming or productivity tasks. Motherboard that built with heatsinks can effectively manage thermal performance hence ensure system stability and durability effortlessly. PWM/DC Fan Support ASRock fan headers automatically detect whether fans are running in DC or PWM mode allowing users to fine-tune the fan curve and achieve quieter operation. Fan-Tastic Tuning ASRock A-Tuning Fan-Tastic Tuning function enables users to auto-detect the minimum duty of each fan with a single click. Users can also easily adjust the fan curve via the visualized UI interface meeting their system's cooling performance and noise reduction requirements. Connectivity Quzo.co.uk Delivery: to United Kingdom Report	£120.34 Buy in shop

	Asrock B850M PRO-A 4711581490390 gtechPro.co.uk Delivery: in United Kingdom Report	£121.73 Buy in shop