ASRock B850 Pro-A
Motherboard | ATX | Socket AM5 | AMD B850 Chipset | USB-C 3.2 Gen 2x2, USB-C 3.2 Gen 1, USB 3.2 Gen 1, USB-C 3.2 Gen2 | 2.5 Gigabit LAN | onboard graphics (CPU required) | HD Audio (8-channel)
Main Specification
| Product Description | ASRock B850 Pro-A - motherboard - ATX - Socket AM5 - AMD B850 |
|---|---|
| Product Type | Motherboard - ATX |
| Chipset Type | AMD B850 |
| Processor Socket | 1 x Socket AM5 |
| Compatible Processors | (supports Ryzen 7000/8000/9000 Series) |
| Max RAM Size | 256 GB |
| RAM Supported | 4 DIMM slots - DDR5, non-ECC, unbuffered |
| Storage Ports | 4 x SATA-600 (RAID), 2 x Hyper M.2, 1 x Blazing M.2, 1 x Ultra M.2 |
| USB / FireWire Ports | 1 x USB-C 3.2 Gen 2 + 1 x USB-C 3.2 Gen 1 + 4 x USB 3.2 Gen 1 + 6 x USB 2.0 + (1 x USB-C 3.2 Gen 2x2 + 2 x USB 3.2 Gen 1 + 3 x USB 2.0 via headers) |
| Audio | HD Audio (8-channel) |
| LAN | 2.5 Gigabit Ethernet |
General
| Product Type | Motherboard - ATX |
|---|---|
| Chipset Type | AMD B850 |
| Processor Socket | Socket AM5 |
| Max Processors Qty | 1 |
| Compatible Processors | (supports Ryzen 7000/8000/9000 Series) |
Supported RAM
| Max Size | 256 GB |
|---|---|
| Technology | DDR5 |
| Bus Clock | 4000 MHz (O.C.) |
| Supported RAM Integrity Check | Non-ECC |
| Registered or Buffered | Unbuffered |
| Features | Dual channel memory architecture, AMD EXPO technology |
Audio
| Type | HD Audio (8-channel) |
|---|---|
| Audio Codec | Realtek ALC897 |
| Compliant Standards | High Definition Audio |
LAN
| Network Controller | Dragon RTL8125BG |
|---|---|
| Network Interfaces | 2.5 Gigabit Ethernet |
Expansion / Connectivity
| Expansion Slots | 1 x CPU 4 x DIMM 288-pin 1 x PCIe 5.0 x16 1 x PCIe 4.0 x16 (x4 mode) 1 x M.2 socket (Key E, for wireless module) 3 x M.2 socket (2280 M.2 Key M slot) 1 x M.2 socket (2230/2242/2260/2280/22110 M.2 Key M slot) |
|---|---|
| Storage Interfaces | SATA-600 -connectors: 4 x 7pin Serial ATA - RAID 0 / RAID 1 PCIe 5.0 -connectors: 1 x M.2 - RAID 0 / RAID 1 / RAID 10 PCIe 4.0 -connectors: 2 x M.2 - RAID 0 / RAID 1 / RAID 10 PCIe 3.0 -connectors: 1 x M.2 |
| Interfaces | 2 x aerial 1 x HDMI 1 x USB-C 3.2 Gen 2 1 x USB-C 3.2 Gen 1 4 x USB 3.2 Gen 1 6 x USB 2.0 1 x LAN (2.5Gigabit Ethernet) 1 x microphone - mini-jack 1 x audio line-in - mini-jack 1 x audio line-out - mini-jack |
| Internal Interfaces | 1 x USB-C 3.2 Gen 2x2 - header 2 x USB 3.2 Gen 1 - header 3 x USB 2.0 - header 1 x audio - header 1 x SPI - header |
| Power Connectors | 24-pin main power connector, 2 x 8-pin ATX12V connectors |
Features
| BIOS Type | AMI |
|---|---|
| BIOS Features | UEFI BIOS |
| Hardware Features | 14+2+1 Phase Power Design, 80A Power Stage, Dr.MOS MOSFET, BIOS FlashBack button, ASRock Auto Driver Installer, ASRock POST Status Checker (PSC), ASRock EZ Mode, ASRock Full HD UEFI, ASRock Instant Flash, Hi-Density Power Connectors, 8 Layer PCB, aluminium heatsink design, ASRock Polychrome RGB, DIY Friendly Design, reinforced PCIe slots, VRM heatsink design, Enlarged Chipset Heatsink, Surface Mount Technology (SMT) |
Miscellaneous
| Included Accessories | IO shield, 1 x M.2 screw |
|---|---|
| Cables Included | 2 x Serial ATA cable |
| Software Included | ASRock A-Tuning, ASRock Dragon 2.5G LAN Software, ASRock Polychrome SYNC |
| Compliant Standards | FCC, ErP Ready, EuP Ready |
| Width | 30.5 cm |
| Depth | 24.4 cm |
Product features
Robust storage options
The motherboard features multiple M.2 slots, including Hyper M.2 and Blazing M.2, facilitating high-speed storage solutions and enabling quick data access.Usability and customization
Designed with a DIY-friendly approach, the B850 Pro-A includes reinforced PCIe slots and an intuitive UEFI BIOS, allowing users to easily configure and upgrade their systems.Advanced networking capabilities
Equipped with a Dragon RTL8125BG network controller, this motherboard supports 2.5 Gigabit Ethernet, ensuring high-speed and stable Internet connectivity.Dynamic RAM performance
Supporting dual-channel memory architecture and AMD EXPO technology, the B850 Pro-A maximizes the performance of compatible DDR5 RAM for better responsiveness and system efficiency.Efficient power design
With a 14+2+1 phase power design and a well-designed VRM heatsink, the motherboard ensures stable power delivery to the CPU, promoting system reliability and longevity.Key selling points
- Supports Ryzen 7000/8000/9000 Series processors
- Four DIMM slots for DDR5 RAM with speeds up to 4000 MHz (O.C.)
- Multiple M.2 slots for enhanced storage options
- Rich connectivity options including USB 3.2 Gen 2 and 2.5 Gigabit Ethernet
- DIY-friendly design with reinforced PCIe slots
References
MPN: B850 PRO-A
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23/06/2026 20:36:50