ASRock B850 Pro-A AM5 ATX DDR5 Motherboard

The ASRock B850 Pro-A Motherboard is a high-performance ATX motherboard engineered for demanding AMD Ryzen builds. Featuring a robust 14+2+1 phase power design, PCIe 5.0 support, four M.2 slots and ultra-fast connectivity, it’s ideal for gaming systems, content creation workstations and future-ready PC builds.

With support for the latest DDR5 memory and Ryzen 7000, 8000 and 9000 series processors, this board delivers exceptional performance, scalability and stability.

Key Features & Benefits

✔ AM5 Socket for Latest Ryzen CPUs
Supports AMD Ryzen 7000, 8000 and 9000 series processors.

✔ 14+2+1 Power Phase Design (80A Dr.MOS)
Premium power delivery for stable performance under heavy workloads.

✔ DDR5 High-Speed Memory Support
Up to 256GB DDR5 RAM with speeds up to 8000+ MHz (OC).

✔ PCIe 5.0 Graphics & Storage Ready
Next-generation bandwidth for GPUs and NVMe SSDs.

✔ Quad M.2 Storage Support
Includes 1 × Gen5, 2 × Gen4 and 1 × Gen3 M.2 slots.

✔ USB-C with DisplayPort Alt Mode
Single cable for data + display output via USB-C.

✔ Front USB 3.2 Gen2x2 Type-C (20Gbps)
High-speed front panel connectivity for modern cases.

✔ 2.5GbE LAN Connectivity
Fast and reliable wired networking.

✔ Expandable WiFi Support (M.2 Key E)
Add WiFi capability via optional module.

✔ BIOS Flashback Button
Update BIOS easily without CPU or RAM.

Technical Specifications

General

Product
ASRock B850 Pro-A

Manufacturer
ASRock

Form Factor
ATX

Chipset
AMD B850

Socket
AM5

CPU Support

Compatible CPUs
AMD Ryzen 7000 / 8000 / 9000 Series

Graphics Support
Integrated AMD RDNA graphics (CPU dependent)

Memory

Memory Slots
4 × DDR5 DIMM

Maximum Capacity
256GB

Memory Speeds
Up to 8000+ MHz (OC)

Memory Type
DDR5 Dual Channel

Profiles Supported
XMP & AMD EXPO

Expansion Slots

1 × PCIe 5.0 x16
1 × PCIe 4.0 x16 (x4 mode)
1 × M.2 Key E (WiFi module)

Storage

1 × PCIe Gen5 x4 M.2
2 × PCIe Gen4 x4 M.2
1 × PCIe Gen3 x4 M.2
4 × SATA III

RAID Support
RAID 0 / 1 / 10 (NVMe)
RAID 0 / 1 (SATA)

Graphics Output

1 × HDMI 2.1 (4K @ 120Hz)
1 × USB-C (DisplayPort Alt Mode, up to 4K @ 60Hz)

Networking

LAN
2.5 Gigabit LAN (RTL8125BG)

Wireless
Optional via M.2 Key E module

Audio

Codec
Realtek ALC897

Channels
7.1 Channel HD Audio

USB Connectivity

1 × USB 3.2 Gen2x2 Type-C (Front, 20Gbps)
1 × USB 3.2 Gen2 Type-C (Rear)
1 × USB 3.2 Gen1 Type-C (Rear, DP Alt Mode)
6 × USB 3.2 Gen1 Type-A
9 × USB 2.0

Internal Connectors

1 × RGB Header
3 × Addressable RGB Headers
7 × Fan / Pump Headers (incl. AIO Pump)
1 × Front USB-C Gen2x2 Header
2 × USB 2.0 Headers
1 × USB 3.2 Gen1 Header

Rear I/O Ports

1 × HDMI
2 × USB Type-C
4 × USB 3.2 Gen1 Type-A
6 × USB 2.0
1 × RJ-45 LAN
BIOS Flashback Button
HD Audio Jacks

Dimensions

305 × 244 mm (ATX)

Why Choose the ASRock B850 Pro-A

The B850 Pro-A is built for users who want maximum expandability and strong power delivery without stepping into premium pricing tiers. With four M.2 slots, PCIe 5.0 support and high-speed USB-C connectivity, it’s a versatile platform for both gaming rigs and productivity systems.

Its enhanced VRM design and future-proof feature set make it an excellent choice for anyone building a reliable, high-performance AM5 system.