ASROCK B850 Pro-A
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ASROCK B850 Pro-A
The ASROCK B850 Pro-A motherboard supports both Polychrome RGB and SignalRGB, allowing you to synchronise the lighting of all compatible devices. Users can choose from a whole range of effects and coordinate lighting elements according to their own preferences. Thanks to the Auto Driver Installer and BIOS Flashback features, system management is quick and easy – from installing drivers to updating the BIOS without needing to connect a processor or memory. The board supports high-speed Dragon 2.5Gb LAN, which provides up to 2.5× more throughput than a standard gigabit connection. It offers a rich selection of ports, including USB 3.2 Gen2x2 Type-C with transfer speeds of up to 20Gb/s and USB Type-C (DP-alt mode) for connecting an external display. For demanding users, there is also a reinforced PCIe 5.0 slot, which ensures a firm grip on graphics cards and stable signal transmission even under high load.
AMD B850
Chipset
AMD AM5
Socket
ATX
Format
DDR5
Memory type
4×
Number of RAM slotsKey features of the ASROCK B850 Pro-A motherboard
- Advanced power system for stable performance with 14+2+1 phases and Dr.MOS technology
- Greater efficiency and lower temperatures thanks to the 8-layer PCB design
- Maximum speed for modern SSDs with the PCIe 5.0 Blazing M.2 slot
- Efficient heat dissipation with an aluminium heatsink for stable system operation
- Fast and stable connection via Dragon 2.5Gb LAN technology
- Extended connectivity with USB 3.2 Gen2x2 Type-C and DP-alt mode support
- Customisable lighting thanks to Polychrome RGB and SignalRGB systems
- Easy system management with Auto Driver Installer and BIOS Flashback features
Performance and stability thanks to an advanced power system
The board uses a 14+2+1 phase power design with integrated Dr.MOS modules, which ensure smooth and precise power delivery to the processor. Together with high-quality Hi-Density Power connectors, they withstand higher currents during overclocking and minimise the risk of overheating. The eight-layer PCB improves conductivity and ensures lower temperatures even under heavy load. Support for DDR5 memory with XMP and EXPO profiles enables frequencies of up to 8000+MHz (OC) and guarantees top-class system stability.
Fast storage and effective cooling
The ASROCK B850 Pro-A is equipped with the latest PCIe 5.0 Blazing M.2 interface, which offers double the transfer speed of the previous generation – up to 128Gb/s. A massive aluminium heatsink helps to dissipate heat effectively even during demanding tasks, thereby extending component life. The cooling is optimised for maximum thermal stability during gaming and productive work.
Port selection
Storage
- Number of SATA III: 4
- Number of M.2: 4
- M.2_1 – PCIe 5.0 x4 (type 2280, CPU, Blazing M.2)
- M.2_2 – PCIe 4.0 x4 (type 2280, CPU, Hyper M.2)
- M.2_3 – PCIe 4.0 x4 (type 2230/2242/2260/2280, chipset, Hyper M.2)
- M.2_4 – PCIe 3.0 x4 (type 2280, chipset, Ultra M.2)
- Features: RAID 0, RAID 1, RAID 10 (for NVMe SSD; SATA supports RAID 0 and RAID 1)
USB ports
- Rear USB-C 3.2 Gen 2: 1
- Rear USB-C 3.2 Gen 1 (DP-alt mode): 1
- Rear USB 3.2 Gen 1 Type-A: 4
- Rear USB 2.0: 6
- Internal USB-C 3.2 Gen 2x2: 1
- Internal USB 3.2 Gen 1: 1
- Internal USB 2.0: 2
Graphics
- HDMI 2.1
- USB-C
- Supports up to two displays simultaneously
- Graphics outputs: HDMI, USB-C (DP-alt mode)
Sound
- Sound chip: Realtek ALC897
- Number of channels: 7.1
- Rear connectors: Line-in, Front Speaker, Microphone
- Internal connector: front panel audio header
Other
- LAN: Dragon RTL8125BG 2.5GbE LAN (10/100/1000/2500 Mb/s)
- Rear connectors: RJ-45, 3× audio jack, BIOS Flashback button
- Power: 24-pin ATX, 2× 8-pin ATX 12V (Hi-Density connectors)
- Cooling: 2× CPU FAN, 4× system FAN, AIO pump header
- Internal connectors: RGB LED, 3× ARGB LED, TPM, front panel audio, front panel, Power LED and Speaker header
Choosing a motherboard
When choosing a motherboard, it's important to pay particular attention to the socket type, format, and chipset. These are the most crucial parameters, ensuring the board is compatible with the processor, expansion cards, and other components. The specific socket determines your choice of processor, while the remaining connectors dictate which other components you'll need for your future computer.Specifications
Format & functions
Memory
Advanced parameters
Connectors
Compatibility
Colour
This product is not an independently functional unit and may require professional installation.
Specifications can be changed without notice. Images are for illustrative purposes only.
