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Asrock B850M Pro-A AMD B850 Socket AM5 micro ATX

£130.80 £109.00

Micro ATX, Socket AM5, AMD B850 chipset, 4 x DDR5 DIMM, 7.1 ch audio, 2.5 Gigabit LAN, AMI UEFI BIOS

Supports AMD Socket AM5 Ryzen™ 9000, 8000 and 7000 Series Processors
8+2+1 Phase Power Design, Dr.MOS for VCore+SOC+MISC
4 x DDR5 DIMMs, Supports Dual Channel, up to 8000+ (OC)
1 PCIe 5.0 x16, 1 PCIe 4.0 x4
Graphics Output Options: 1 HDMI, 1 DisplayPort
Realtek ALC897 7.1 CH HD Audio Codec
1 Blazing M.2 (PCIe Gen5x4), 2 Hyper M.2 (PCIe Gen4x4), 4 SATA3
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)
Realtek 2.5G LAN
Supports BIOS Flashback

More Information

More Information
SKU	B850M PRO-A
EAN	4711581490390
Manufacturer	Asrock
Availability	Y
PDF URLs	View PDF

Description

Optimized for stability, durability, and efficiency. It combines reliable performance, user-friendly features and streamlined style 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
Dragon 2.5 Gb/s LAN
The intelligent 2.5Gb/s LAN platform is built for maximum networking performance for the demanding requirements of home networking, content creators, online gamers and high-quality streaming media. Boost networking performance up to 2.5X the bandwidth compared to the standard gigabit Ethernet, you’ll enjoy the faster and uncompromised connectivity experience for gaming, file transfers and backups.

Stylish Design
POLYCHROME RGB
This motherboard features onboard RGB headers and addressable RGB headers that allow motherboard to be connected to compatible LED devices such as strip, CPU fans, coolers, chassis and so on. Users may also synchronize RGB LED devices across the Polychrome RGB Sync-certified accessories to create their own unique lighting effects.

SignalRGB
SignalRGB unifies your RGB devices, offering seamless customization, game-reactive effects, macro automation, and system monitoring. The official partnership empowers ASRock motherboards with advanced lighting control, enhances compatibility with a diverse range of RGB devices, and provides greater customization flexibility.

DIY Friendly
Dual Graphics Outputs
Complete with two types of most used connectors! Packed with a HDMI + DisplayPort combo, you have more graphics output options now.

Reinforced Steel Slot [PCIe 5.0 Version]
The reinforced steel slot is capable of supporting PCI Express 5.0 standard. The various benefits include:
- Extra anchor points
- Stronger latch
- Ensure signal stability
- Make sure heavy graphics cards to be well-installed.

EZ Setting
Auto Driver Installer
No need to worry about lack of disk drive! Asrock preinstall LAN driver to ensure that you are able to install all drivers needed in an easier way than using SCD.

BIOS Flashback
Get the most convenient BIOS flashing with just a simple click. Users can easily achieve the latest BIOS support with a USB and a power supply. No CPU, RAM or other components are required.

Specifications

Internal I/O
Number of M.2 (M) slots	3
USB 3.2 Gen 2 (3.1 Gen 2) connectors	0
12V power connector	Yes
Supported storage drive interfaces	PCI Express 4.0, PCI Express 5.0, SATA III
USB 2.0 connectors	2
USB 3.2 Gen 1 (3.1 Gen 1) connectors	3
TPM connector	Yes
Number of SATA III connectors	4
Number of chassis fan connectors	3
Front panel audio connector	Yes
EPS power connector (8-pin)	Yes
CPU fan connector	Yes
ATX Power connector (24-pin)	Yes
RGB LED pin header	Yes
Number of CPU fan connectors	2
Number of EPS power connectors (8-pin)	1
Number of RGB LED pin headers	1
Technical details
Motherboard chipset family	AMD
Motherboard chipset	AMD B850
Supported processor sockets	Socket AM5
Parallel processing technology support	Not supported
HDMI version	2.1
Motherboard form factor	micro ATX
Component for	PC
Audio
Audio output channels	7.1 channels
Performance
Supported storage drive types	HDD & SSD
Windows operating systems supported	Windows 10 x64, Windows 11 x64
Motherboard chipset family	AMD
Motherboard chipset	AMD B850
RAID levels	0, 1, 10
Supported processor sockets	Socket AM5
Certification	FCC, CE, ErP/EuP
Audio output channels	7.1 channels
Motherboard form factor	micro ATX
Component for	PC
Processor
Processor manufacturer	AMD
Compatible processor series	AMD Ryzen 7000 Series, AMD Ryzen 8000 Series, AMD Ryzen 9000 Series
Supported processor sockets	Socket AM5
Processor socket	Socket AM5
Memory
Number of memory slots	4
Memory slots type	DIMM
Supported memory types	DDR5-SDRAM
Memory channels	Dual-channel
Maximum internal memory	256 GB
Unbuffered memory	Yes
ECC сompatibility	ECC & Non-ECC
Storage controllers
Supported storage drive types	HDD & SSD
Supported storage drive interfaces	PCI Express 4.0, PCI Express 5.0, SATA III
RAID levels	0, 1, 10
Number of storage drives supported	7
RAID support	Yes
Graphics
Parallel processing technology support	Not supported
Maximum resolution	3840 x 2160 pixels
HDCP	Yes
Rear panel I/O ports
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity	2
USB 3.2 Gen 1 (3.1 Gen 1) Type-C ports quantity	0
USB 3.2 Gen 2 (3.1 Gen 2) Type-A ports quantity	1
USB 3.2 Gen 2 (3.1 Gen 2) Type-C ports quantity	1
DisplayPort version	1.4
USB connector type	USB Type-A, USB Type-C
USB 2.0 ports quantity	4
VGA (D-Sub) ports quantity	0
Microphone in	Yes
Headphone outputs	3
HDMI version	2.1
HDMI ports quantity	1
Ethernet LAN (RJ-45) ports	1
DVI-D ports quantity	0
DisplayPorts quantity	1
Line-in	Yes

Network
Ethernet LAN	Yes
Wi-Fi	No
LAN controller	Dragon RTL8125BG
Ethernet interface type	2.5 Gigabit Ethernet
Features
Windows operating systems supported	Windows 10 x64, Windows 11 x64
Motherboard chipset family	AMD
Motherboard chipset	AMD B850
Supported processor sockets	Socket AM5
Certification	FCC, CE, ErP/EuP
Audio output channels	7.1 channels
Motherboard form factor	micro ATX
Component for	PC
Audio chip	Realtek ALC897
Product colour	Black
Expansion slots
Number of M.2 (M) slots	3
PCI Express x16 (Gen 5.x) slots	1
PCI Express x4 (Gen 4.x) slots	1
1st M.2 largest key size	2280
1st M.2 highest PCI Express generation	5.0
2nd M.2 largest key size	2280
2nd M.2 highest PCI Express generation	4.0
3rd M.2 largest key size	2280
3rd M.2 highest PCI Express generation	4.0
BIOS
BIOS type	UEFI AMI
BIOS memory size	256 Mbit
Video
Maximum resolution	3840 x 2160 pixels
HDCP	Yes
Certificates
Certification	FCC, CE, ErP/EuP
Software
Windows operating systems supported	Windows 10 x64, Windows 11 x64
Weight & dimensions
Width	244 mm
Depth	244 mm
Packaging content
Cables included	SATA
Screws included	Yes

Delivery Details

UK distributors.
Order before 4 pm for next-day delivery.
Standard (2-3 days) £7.50
Next Day £9.99
Free standard delivery over £100

There are deivery surcharges to these postcodes:

Postcode	Charge
IV3-40	£20
IV52-54	£20
IV63	£20
KW1-14	£20
PA10-40	£20
PH19-40	£20
PH50	£20
HS	£50
IV41-51	£50
IV55-56	£50
KA27-28	£50
KW15-17	£50
PA41-49	£50
PA60-62	£50
PA76-78	£50
PH41-44	£50
ZE	£50
IM	£50
JE	£50
GY	£50
TR21-25	£50
BT	£20