






Asrock B850M PRO-A Motherboard
- CPU socket
- AM5
- Chipset (MB)
- AMD B850 MB
- Form factor
- Micro ATX
- Supported memory
- DDR5
- Number of memory slots
- 4
Description
Asrock B850M PRO-A is a micro ATX motherboard for AM5, aimed at stable mid-range gaming and productive configurations. It combines the new AMD B850 chipset with support for Ryzen 9000, 8000, and 7000 series, so you have room for upgrades to future CPU generations. You get a modern DDR5 controller with high frequencies and quite a rich I/O section for a compact board. The Micro ATX form factor gives you a balance between size, airflow, and expansion capabilities.
What you get
Four DDR5 slots with up to 256 GB RAM and frequencies up to 8000 MHz (O.C.) mean you can build both a brutal gaming rig and a serious workstation configuration without worrying about memory. The PCIe 5.0 x16 slot from the CPU is ready for current and future high-end GPUs, while the Blazing M.2 Gen5x4 plus two more Hyper M.2 Gen4x4 slots allow you to install several very fast NVMe SSDs for games, software, and projects. The built-in 2.5G LAN is a serious upgrade over standard gigabit – useful for online gaming, streaming, and working with large files over the network. Realtek ALC897 7.1 audio is decent enough for gaming and multimedia, especially if you combine it with good speakers or headphones. The abundant number of USB ports – including rear USB 3.2 Gen2 and front USB-C – make connecting peripherals and external SSDs quite convenient.
- The AM5 socket with support for Ryzen 9000, 8000, and 7000 Series gives you direct access to current and future AMD processor generations.
- Four DDR5 slots with up to 256 GB and frequency up to 8000 MHz (O.C.) allow for fast and scalable memory for gaming, streaming, and heavy applications.
- One PCIe 5.0 x16 slot for graphics card and another PCIe 4.0 x4 slot provide space for modern GPUs and additional expansion cards.
- Three M.2 slots – 1 x Gen5x4 and 2 x Gen4x4 – give you the option for several NVMe SSDs with very high loading speeds for games and projects.
- 4 x SATA3 6.0 Gb/s ports with support for RAID 0, 1, 10 are convenient for mass storage solutions, backup, or media libraries.
- Built-in Dragon RTL8125BG 2.5 Gigabit LAN (up to 2500 Mb/s) offers lower latency and higher bandwidth than standard 1G LAN.
- Rich selection of USB: rear USB 3.2 Gen2 Type-C and Type-A, front USB 3.2 Gen1 Type-C, plus multiple USB 3.2 Gen1 and USB 2.0 for all your peripherals.
- Built-in 7.1-Channel High Definition Audio (Realtek ALC897) meets the needs for gaming and movies without the need for an external sound card.
Who it is suitable for
Asrock B850M PRO-A is a good choice for mid-range to high-end AM5 builds – gaming at high settings, streaming, productivity, and even more serious multitasking with lots of RAM and fast NVMe drives. It is also suitable if you want a compact but not limited Micro ATX configuration with PCIe 5.0 for future GPU upgrades. If you are looking for built-in Wi-Fi and Bluetooth, you will need to add a separate module in the M.2 (Key E) slot or an external adapter.
The combination of AM5, B850, PCIe 5.0 x16, and three M.2 slots (including Gen5) in a Micro ATX format makes this board a very sensible foundation for a modern and future-oriented build without unnecessary extras and marketing embellishments.
Full specifications
- Manufacturer
-
Asrock
- CPU socket
-
AM5
- Chipset (MB)
- AMD B850
- Form factor
- Micro ATX
- Supported processors
-
Supports AMD Socket AM5 Ryzen™ 9000, 8000 and 7000 Series Processors
- Supported memory
-
DDR5
- Number of memory slots
- 4
- Maximum RAM capacity
- 256 GB
- Memory frequency (MHz)
-
up to 8000MHz (O.C.)
- Support for dual-channel memory
- Yes
- Built-in audio
-
Realtek ALC897 Codec7.1-Channel High Definition Audio
- Built-in Wi-Fi
-
No
- Bluetooth version
- No
- Built-in LAN
-
1 x Dragon RTL8125BG 2.5 Gigabit LAN 10/100/1000/2500 Mb/s
- SATA interface
- 4 x SATA3 6.0 Gb/s
- RAID support
- 0,1,10
- Expansion slots
-
CPU:- 1 x PCIe 5.0 x16 Slot (PCIE1), supports x16 mode*- 1 x PCIe 4.0 x4 Slot (PCIE2), supports x4 mode*Chipset:- 1 x M.2 Socket (Key E), supports type 2230 WiFi/BT PCIe WiFi module- 15μ Gold Contact in VGA PCIe Slot (PCIE1)
- Power connector
-
1 x 24-pin1 x 8-pin1 x 4-pin
- Processor generation
-
7th generation8th generation9th generation
- Warranty
- 36 months
- OS
-
Support for Windows 10 and 11 64-bit
- M2 slot
-
CPU:- 1 x Blazing M.2 Socket (M2_1, Key M), supports type 2280 PCIe Gen5x4 (128 Gb/s) mode*Chipset:- 1 x Hyper M.2 Socket (M2_2, Key M), supports type 2280 PCIe Gen4x4 (64 Gb/s) mode*- 1 x Hyper M.2 Socket (M2_3, Key M), supports type 2280 PCIe Gen4x4 (64 Gb/s) mode*
- USB ports
-
CPU:- 1 x USB 3.2 Gen2 Type-C (Rear)- 1 x USB 3.2 Gen2 Type-A (Rear)Chipset:- 1 x USB 3.2 Gen1 Type-C (Front)- 6 x USB 3.2 Gen1 Type-A (2 Rear, 4 Front)- 8 x USB 2.0 (4 Rear, 4 Front)
- Rear I/O panel
-
- 2 x Antenna Mounting Points- 1 x HDMI Port- 1 x DisplayPort 1.4- 1 x USB 3.2 Gen2 Type-A Port (10 Gb/s)- 1 x USB 3.2 Gen2 Type-C Port- 2 x USB 3.2 Gen1 Ports- 4 x USB 2.0 Ports- 1 x RJ-45 LAN Port- 1 x BIOS Flashback Button- HD Audio Jacks: Line in / Front Speaker / Microphone
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