ASRock B850M Pro-A Socket AM5 Micro-ATX Motherboard
ASROCK

ASRock B850M Pro-A Socket AM5 Micro-ATX Motherboard

  • Maximum resolution3840 x 2160
  • Processor manufacturerAMD
  • Maximum internal memory256 GB
  • Supported storage drive typesHDD & SSD
  • RAID levels0/1/10
  • Audio chipRealtek ALC897

The ASRock B850M Pro-A is a micro-ATX motherboard built for AMD Ryzen processors on Socket AM5. This compact board delivers solid performance for mid-range builds, pairing the AMD B850 chipset with DDR5 memory support and modern connectivity in a space-efficient form factor.

Description

Built for balanced performance and expandability

  • 4 DDR5-SDRAM memory slots for up to 192GB capacity
  • PCI Express 5.0 ×16 slot for next-gen graphics cards and M.2 drives
  • 3 M.2 slots with high-speed storage options
  • HDMI and DisplayPort outputs for flexible display setup
  • USB 3.2 and USB-C ports for fast peripherals and data transfer

Ideal for builders seeking a reliable platform for gaming, content creation, or everyday computing, the B850M Pro-A balances compact design with the connectivity and upgrade potential modern builds demand.

Specifications

General

BrandASROCK
Product colourBlack
HDCPYes
Line-inYes
BIOS typeUEFI AMI
Component forPC
BIOS memory size256
Headphone outputs3
Unbuffered memoryYes
ECC сompatibilityECC & Non-ECC
RGB LED pin headerYes
Number of memory slots4
Motherboard form factormicro ATX
Number of M.2 (M) slots3
1st M.2 largest key size2280
2nd M.2 largest key size2280
3rd M.2 largest key size2280
Number of RGB LED pin headers1
PCI Express x4 (Gen 4.x) slots1
PCI Express x16 (Gen 5.x) slots1
1st M.2 highest PCI Express generation5.0
2nd M.2 highest PCI Express generation4.0
3rd M.2 highest PCI Express generation4.0
EAN4711581490390

Display

Maximum resolution3840 x 2160

Processor

Processor manufacturerAMD
Motherboard chipsetAMD B850
Processor socketSocket AM5
CPU fan connectorYes
Motherboard chipset familyAMD
Compatible processor seriesAMD Ryzen 7000 Series/AMD Ryzen 8000 Series/AMD Ryzen 9000 Series
Supported processor socketsSocket AM5
Number of CPU fan connectors2

Memory

Maximum internal memory256 GB
Memory channelsDual-channel
Memory slots typeDIMM

Storage

Supported storage drive typesHDD & SSD
Number of storage drives supported7
Supported storage drive interfacesPCI Express 4.0, PCI Express 5.0, SATA III

Audio

Audio chipRealtek ALC897
Microphone inYes
Audio output channels7.1
Front panel audio connectorYes

Ports

HDMI ports quantity1
HDMI version2.1
USB 2.0 ports quantity4
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity2
USB 3.2 Gen 2 (3.1 Gen 2) Type-A ports quantity1
USB 3.2 Gen 2 (3.1 Gen 2) Type-C ports quantity1
USB connector typeUSB Type-A/USB Type-C
Ethernet LANYes
Ethernet LAN (RJ-45) ports1
TPM connectorYes
LAN controllerDragon RTL8125BG
USB 2.0 connectors2
12V power connectorYes
DisplayPort version1.4
DisplayPorts quantity1
Ethernet interface type2.5 Gigabit Ethernet
EPS power connector (8-pin)Yes
ATX Power connector (24-pin)Yes
Number of SATA III connectors4
Number of chassis fan connectors3
USB 3.2 Gen 1 (3.1 Gen 1) connectors3
Number of EPS power connectors (8-pin)1

Connectivity

Wi-FiNo

Software & security

Windows operating systems supportedWindows 10 x64/Windows 11 x64

Performance & capacities

RAID levels0/1/10

Features

Cables includedSATA
RAID supportYes
Screws includedYes
Supported memory typesDDR5-SDRAM
Parallel processing technology supportNot supported

Dimensions & weight

Width244 mm
Depth244 mm
Product Net Weight1.3 kg

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