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header-product Motherboard ASRock B850 Pro-A — AMD B850 chipset, Socket AM5, ATX, 4× DDR5 DIMM, 256 GB, 4× M.2, PCIe 5.0 x16, 2.5Gb LAN
146.49 €

Motherboard ASRock B850 Pro-A — AMD B850 chipset, Socket AM5, ATX, 4× DDR5 DIMM, 256 GB, 4× M.2, PCIe 5.0 x16, 2.5Gb LAN

ASRock B850 Pro-A ATX motherboard Socket AM5 Photo 1
ASRock B850 Pro-A ATX motherboard Socket AM5 Photo 2
ASRock B850 Pro-A ATX motherboard Socket AM5 Photo 3
ASRock B850 Pro-A ATX motherboard Socket AM5 Photo 4
ASRock B850 Pro-A ATX motherboard Socket AM5 Photo 5
ASRock B850 Pro-A ATX motherboard Socket AM5 Photo 1
ASRock B850 Pro-A ATX motherboard Socket AM5 Photo 2
ASRock B850 Pro-A ATX motherboard Socket AM5 Photo 3
ASRock B850 Pro-A ATX motherboard Socket AM5 Photo 4
ASRock B850 Pro-A ATX motherboard Socket AM5 Photo 5
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Motherboard ASRock B850 Pro-A — AMD B850 chipset, Socket AM5, ATX, 4× DDR5 DIMM, 256 GB, 4× M.2, PCIe 5.0 x16, 2.5Gb LAN

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Motherboard ASRock B850 Pro-A — AMD B850 chipset, Socket AM5, ATX, 4× DDR5 DIMM, 256 GB, 4× M.2, PCIe 5.0 x16, 2.5Gb LAN

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Short description

ASRock B850 Pro-A is an ATX motherboard with AMD B850 chipset for Socket AM5 processors (AMD Ryzen 7000 series). It supports up to 256 GB DDR5 memory across 4 DIMM slots (dual-channel, ECC & non‑ECC), four M.2 slots (PCIe 5.0/4.0/3.0), one PCIe 5.0 x16 slot, RAID, 2.5 Gigabit Ethernet (Dragon RTL8125BG), Realtek ALC897 7.1 audio, HDMI 2.1, multiple USB ports including USB‑C, and fan/water pump headers for custom cooling.
Available at price 146.49 €: 8 pcs.
Total available for order: 82 pcs.
Warranty: 2 Years
SKU: 11247608
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Cheapest delivery:

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Cost

1.79 €

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From 4.99 € (Weight: 1.74 kg)
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Product information

Description

The Asrock B850 Pro-A AMD B850 Socket AM5 ATX is a full-size ATX motherboard engineered for AMD Socket AM5 processors, compatible with Ryzen 7000, 8000 and 9000 series. It supports DDR5 memory up to 256 GB across four DIMM slots and offers a variety of storage interfaces including PCIe Gen5, Gen4, Gen3 M.2 and SATA III. The board integrates an optimized power delivery system and multi-layer PCB to deliver stable performance for everyday computing, content creation and gaming.

Advantages

This motherboard features a 14+2+1 power phase VRM design with Dr.MOS integrated power stages for efficient and smooth CPU power delivery, enabling better thermal performance and stable overclocking. An 8-layer PCB improves signal integrity and energy efficiency for memory overclocking. High-speed storage options include a PCIe Gen5 Blazing M.2 slot and Hyper M.2 Gen4 x4 support. Cooling-focused elements such as aluminum heatsinks, intelligent PWM/DC fan headers and Fan-Tastic Tuning help maintain low temperatures and quiet operation. Connectivity is broadened with a Dragon 2.5 Gb/s LAN and front-panel USB 3.2 Gen2x2 Type-C header. Built-in RGB headers and SignalRGB support enable system lighting customization, while reinforced PCIe steel slots and BIOS Flashback add durability and ease of use.

Suitable for

  • Desktop systems for gaming and multimedia
  • Content creation and productivity workstations
  • Systems requiring fast NVMe storage and high-speed networking
  • Enthusiast builds with DDR5 memory and moderate overclocking

Key specifications

  • Form factor: ATX
  • Chipset: AMD B850
  • CPU socket: Socket AM5 (supports Ryzen 7000/8000/9000 series)
  • Memory: 4 x DDR5 DIMM slots, up to 256 GB, Intel XMP / AMD EXPO support
  • Storage: PCIe Gen5 M.2 (Blazing M.2), PCIe Gen4 M.2 (Hyper M.2 Gen4 x4), SATA III
  • LAN: Dragon 2.5 Gb/s Ethernet
  • USB: Front-panel USB 3.2 Gen2x2 Type-C header, USB Type-C with DP-alt mode
  • Power delivery: 14+2+1 phase VRM with Dr.MOS and Hi-Density power connector

How to use

Install the motherboard into an ATX-compatible case and connect a compatible AM5 CPU, DDR5 memory modules, storage devices (M.2 or SATA) and a suitable power supply using the Hi-Density power connector and standard ATX power cables. Use the reinforced PCIe 5.0 slot for a graphics card if required. Connect case fans to the PWM/DC headers and configure fan curves with the Fan-Tastic Tuning utility in the provided ASRock software. Update or flash the BIOS using BIOS Flashback if needed before first boot to ensure CPU and memory compatibility.

Usage recommendations

For stable overclocking and long-term reliability, use high-quality DDR5 modules that support Intel XMP or AMD EXPO profiles, ensure adequate case ventilation and use the onboard heatsinks and fan control features to keep VRM and storage temperatures low. When performing major BIOS updates, follow ASRock instructions and use a reliable USB drive and stable power source.

Specifications

BIOS type: The BIOS (Basic Input/Output System) initializes and tests system hardware components, and loads a bootloader or an operating system from a mass memory device. The BIOS additionally provides abstraction layer for the hardware, i.e. a consistent way for application programs and operating systems to interact with the keyboard, display, and other input/output devices. There are several types of BIOS, including the motherboard ROM BIOS, video BIOS, drive controller BIOS, network adapter BIOS, and SCSI adapter BIOS.
UEFI AMI
Audio output channels: An audio output channel is an electric circuit which acts as a path for a signal produced by a device. A device may have several audio output channels.
7.1
Motherboard chipset: The chipset connects the microprocessor to the rest of the motherboard.
AMD B850
Motherboard chipset family: The category of motherboard chipset e.g. Intel, AMD.
AMD
Motherboard form factor: Design of the motherboard (ATX, BTX etc).
ATX
Component for: What this product is used as a part of (component for).
PC
Wi-Fi: Popular technology that allows an electronic device to exchange data or connect to the internet wirelessly using radio waves.
No
DVI-D ports quantity: This is the amount of DVI-I interfaces. Digital Visual Interface (DVI) is a video display interface developed by the Digital Display Working Group (DDWG). The digital interface is used to connect a video source to a display device, such as a computer monitor. DVI-D means DVI digital, which means it can only support digital, but not analog.
0
HDMI ports quantity: The number of sockets (ports) for HDMI connections. HDMI (High-Definition Multimedia Interface) is a compact audio/video interface for transferring uncompressed video data and compressed/uncompressed digital audio data from a HDMI-compliant device ("the source device") to a compatible computer monitor, video projector, digital television, or digital audio device. HDMI is a digital replacement for existing analog video standards.
1
VGA (D-Sub) ports quantity: Number of VGA (D-Sub) ports (connecting interfaces) in the device. The VGA (D-Sub) connector is a 15 pin connector between a computer and a monitor. It was first introduced in 1987 by IBM.
0
Ethernet LAN (RJ-45) ports: Number of Ethernet LAN (RJ-45) ports (connecting interfaces) in the device. Ethernet LAN (RJ-45) ports allow a computer to connect to the ethernet.
1
USB 3.2 Gen 2 (3.1 Gen 2) Type-C ports quantity: Number of USB 3.1 (3.1 Gen 2) ports with Type-C connector. USB 3.1 (3.1 Gen 2) is USB interface version which supports transfer rate up to 10 Gbit/s (SuperSpeed+). USB Type-C connector has symmetrical design architecture and compatible with Thunderbolt 3 interface.
1
USB 3.2 Gen 2 (3.1 Gen 2) Type-A ports quantity:
0
USB 3.2 Gen 1 (3.1 Gen 1) Type-C ports quantity: Number of USB 3.0 (3.1 Gen 1) ports with Type-C connector. USB 3.0 (3.1 Gen 1) is USB interface version which supports transfer rate up to 5 Gbit/s (SuperSpeed). USB Type-C connector has symmetrical design architecture and compatible with Thunderbolt 3 interface.
1
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity:
4
USB 2.0 ports quantity: Number of USB 2.0 ports (connecting interfaces) in the device. USB 2.0 was released in April 2000 (now called "Hi-Speed"), adding higher maximum signaling rate of 480 Mbit/s (effective throughput up to 35 MB/s or 280 Mbit/s), USB 2.0 ports are usually black.
6
Number of SATA III connectors: Serial ATA (Advanced Technology Attachment) (SATA) is a computer bus interface that connects host bus adapters to mass storage devices such as hard disk drives and optical drives. SATA III (revision 3.x) interface, formally known as SATA 6Gb/s, is a third generation SATA interface running at 6.0Gb/s. The bandwidth throughput, which is supported by the interface, is up to 600MB/s. This interface is backwards compatible with SATA 3 Gb/s interface.
4
USB 3.2 Gen 2 (3.1 Gen 2) connectors:
0
USB 3.2 Gen 1 (3.1 Gen 1) connectors: This is a connector (normally attached to a cable) for USB 3.0. USB 3.0 is the second major revision of the Universal Serial Bus (USB) standard for computer connectivity. First introduced in 2008, USB 3.0 adds a new transfer mode called "SuperSpeed," (distinguishable from USB 2.0 by either the blue colour of the port or the initials SS) capable of transferring data at up to 5Gbit/s—more than ten times as fast as the 480 Mbit/s top speed of USB 2.0.
1
USB 2.0 connectors: The end of a cable with a USB 2.0 connector. USB 2.0 was released in April 2000 (now called "Hi-Speed"), adding higher maximum signaling rate of 480 Mbit/s (effective throughput up to 35 MB/s or 280 Mbit/s), in addition to the "USB 1.x Full Speed" signaling rate of 12 Mbit/s. USB 2.0 connectors are usually colored black.
2
Maximum internal memory: The maximum internal memory which is available in the product.
256 GB
Number of memory slots:
4
Processor socket: Mechanical component(s) that provides mechanical and electrical connections between a microprocessor and a printed circuit board (PCB). This allows the processor to be replaced without soldering.
Socket AM5
Processor manufacturer: The manufacturer that produced the processor.
AMD
Parallel processing technology support: Parallel processing technology is the simultaneous use of more than one CPU or processor core to execute a program or multiple computational threads. Ideally, parallel processing makes programs run faster because there are more engines (CPUs or Cores) running it. In practice, it is often difficult to divide a program in such a way that separate CPUs or cores can execute different portions without interfering with each other. Most computers have just one CPU, but some models have several, and multi-core processor chips are becoming the norm. There are even computers with thousands of CPUs.
Not supported
Supported storage drive interfaces:
PCI Express 5.0, SATA III, PCI Express 4.0, PCI Express 3.0
Supported memory types: Types of memory which can be used with the product.
DDR5-SDRAM
All features

Packaging content

Cables included:
SATA
Screws included:
Yes

Weight & dimensions

Depth: The distance from the front to the back of something.
244 mm
Width: The measurement or extent of something from side to side.
305 mm

BIOS

BIOS memory size:
256 Mbit
BIOS type: The BIOS (Basic Input/Output System) initializes and tests system hardware components, and loads a bootloader or an operating system from a mass memory device. The BIOS additionally provides abstraction layer for the hardware, i.e. a consistent way for application programs and operating systems to interact with the keyboard, display, and other input/output devices. There are several types of BIOS, including the motherboard ROM BIOS, video BIOS, drive controller BIOS, network adapter BIOS, and SCSI adapter BIOS.
UEFI AMI

Expansion slots

4th M.2 highest PCI Express generation:
3.0
4th M.2 largest key size:
2280
3rd M.2 highest PCI Express generation:
4.0
3rd M.2 largest key size:
2280
2nd M.2 highest PCI Express generation:
4.0
2nd M.2 largest key size:
2280
1st M.2 highest PCI Express generation:
5.0
1st M.2 largest key size:
2280
Number of M.2 (M) slots:
4
PCI Express x16 (Gen 5.x) slots:
1
PCI Express x16 (Gen 4.x) slots:
1

Features

Certification:
FCC, CE, ErP/EuP
Windows operating systems supported: Windows vesions wich can be used with the device.
Windows 11 x64, Windows 10 x64
Product colour: The colour e.g. red, blue, green, black, white.
Black
Audio output channels: An audio output channel is an electric circuit which acts as a path for a signal produced by a device. A device may have several audio output channels.
7.1
Audio chip:
Realtek ALC897
Motherboard chipset: The chipset connects the microprocessor to the rest of the motherboard.
AMD B850
Motherboard chipset family: The category of motherboard chipset e.g. Intel, AMD.
AMD
Motherboard form factor: Design of the motherboard (ATX, BTX etc).
ATX
Component for: What this product is used as a part of (component for).
PC

Network

Wi-Fi: Popular technology that allows an electronic device to exchange data or connect to the internet wirelessly using radio waves.
No
LAN controller:
Dragon RTL8125BG
Ethernet interface type:
25 Gigabit Ethernet
Ethernet LAN: An Ethernet LAN (Local Area Network) interface is present, for a wired conection via a cable.
Yes

Rear panel I/O ports

USB connector type: The type of USB connector/port that this product has.
USB Type-C, USB Type-A
Microphone in: The socket where a microphone is connected to the device.
Yes
Line-in:
Yes
Headphone outputs: Number of sockets /ports where headphones are connected.
3
DVI-D ports quantity: This is the amount of DVI-I interfaces. Digital Visual Interface (DVI) is a video display interface developed by the Digital Display Working Group (DDWG). The digital interface is used to connect a video source to a display device, such as a computer monitor. DVI-D means DVI digital, which means it can only support digital, but not analog.
0
HDMI version:
2.1
HDMI ports quantity: The number of sockets (ports) for HDMI connections. HDMI (High-Definition Multimedia Interface) is a compact audio/video interface for transferring uncompressed video data and compressed/uncompressed digital audio data from a HDMI-compliant device ("the source device") to a compatible computer monitor, video projector, digital television, or digital audio device. HDMI is a digital replacement for existing analog video standards.
1
VGA (D-Sub) ports quantity: Number of VGA (D-Sub) ports (connecting interfaces) in the device. The VGA (D-Sub) connector is a 15 pin connector between a computer and a monitor. It was first introduced in 1987 by IBM.
0
Ethernet LAN (RJ-45) ports: Number of Ethernet LAN (RJ-45) ports (connecting interfaces) in the device. Ethernet LAN (RJ-45) ports allow a computer to connect to the ethernet.
1
USB 3.2 Gen 2 (3.1 Gen 2) Type-C ports quantity: Number of USB 3.1 (3.1 Gen 2) ports with Type-C connector. USB 3.1 (3.1 Gen 2) is USB interface version which supports transfer rate up to 10 Gbit/s (SuperSpeed+). USB Type-C connector has symmetrical design architecture and compatible with Thunderbolt 3 interface.
1
USB 3.2 Gen 2 (3.1 Gen 2) Type-A ports quantity:
0
USB 3.2 Gen 1 (3.1 Gen 1) Type-C ports quantity: Number of USB 3.0 (3.1 Gen 1) ports with Type-C connector. USB 3.0 (3.1 Gen 1) is USB interface version which supports transfer rate up to 5 Gbit/s (SuperSpeed). USB Type-C connector has symmetrical design architecture and compatible with Thunderbolt 3 interface.
1
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity:
4
USB 2.0 ports quantity: Number of USB 2.0 ports (connecting interfaces) in the device. USB 2.0 was released in April 2000 (now called "Hi-Speed"), adding higher maximum signaling rate of 480 Mbit/s (effective throughput up to 35 MB/s or 280 Mbit/s), USB 2.0 ports are usually black.
6

Internal I/O

Number of RGB LED pin headers:
4
RGB LED pin header:
Yes
TPM connector:
Yes
12V power connector:
Yes
Number of water pump connectors:
1
Number of EPS power connectors (8-pin):
2
EPS power connector (8-pin):
Yes
Number of chassis fan connectors:
4
Number of CPU fan connectors:
2
CPU fan connector:
Yes
ATX Power connector (24-pin):
Yes
Front panel audio connector:
Yes
Number of SATA III connectors: Serial ATA (Advanced Technology Attachment) (SATA) is a computer bus interface that connects host bus adapters to mass storage devices such as hard disk drives and optical drives. SATA III (revision 3.x) interface, formally known as SATA 6Gb/s, is a third generation SATA interface running at 6.0Gb/s. The bandwidth throughput, which is supported by the interface, is up to 600MB/s. This interface is backwards compatible with SATA 3 Gb/s interface.
4
USB 3.2 Gen 2x2 connectors:
1
USB 3.2 Gen 2 (3.1 Gen 2) connectors:
0
USB 3.2 Gen 1 (3.1 Gen 1) connectors: This is a connector (normally attached to a cable) for USB 3.0. USB 3.0 is the second major revision of the Universal Serial Bus (USB) standard for computer connectivity. First introduced in 2008, USB 3.0 adds a new transfer mode called "SuperSpeed," (distinguishable from USB 2.0 by either the blue colour of the port or the initials SS) capable of transferring data at up to 5Gbit/s—more than ten times as fast as the 480 Mbit/s top speed of USB 2.0.
1
USB 2.0 connectors: The end of a cable with a USB 2.0 connector. USB 2.0 was released in April 2000 (now called "Hi-Speed"), adding higher maximum signaling rate of 480 Mbit/s (effective throughput up to 35 MB/s or 280 Mbit/s), in addition to the "USB 1.x Full Speed" signaling rate of 12 Mbit/s. USB 2.0 connectors are usually colored black.
2

Graphics

HDCP: High-bandwidth Digital Content Protection (HDCP) is a form of digital copy protection to prevent copying of digital audio and video content as it travels across connections.
Yes
Maximum resolution: The maximum number of pixels that can be displayed in the image. It is usually quoted as width × height,: for example, "1024 × 768" means the width is 1024 pixels and the height is 768 pixels.
3840 x 2160
Parallel processing technology support: Parallel processing technology is the simultaneous use of more than one CPU or processor core to execute a program or multiple computational threads. Ideally, parallel processing makes programs run faster because there are more engines (CPUs or Cores) running it. In practice, it is often difficult to divide a program in such a way that separate CPUs or cores can execute different portions without interfering with each other. Most computers have just one CPU, but some models have several, and multi-core processor chips are becoming the norm. There are even computers with thousands of CPUs.
Not supported

Storage controllers

RAID levels: RAID is a storage technology that combines multiple disk drive components into a logical unit for the purposes of data redundancy and performance improvement. Data is distributed across the drives in one of several ways, referred to as RAID levels, depending on the specific level of redundancy and performance required.
10, 1
RAID support: The device uses RAID, which is a storage technology that combines multiple disk drive components into a logical unit for the purposes of data redundancy and performance improvement. Data is distributed across the drives in one of several ways, referred to as RAID levels, depending on the specific level of redundancy and performance required.
Yes
Number of storage drives supported: How many storage drives can be fit into the product at once.
8
Supported storage drive interfaces:
PCI Express 5.0, SATA III, PCI Express 4.0, PCI Express 3.0
Supported storage drive types: The type of storage drives the device is compatible with.
HDD & SSD

Memory

Unbuffered memory:
Yes
Maximum internal memory: The maximum internal memory which is available in the product.
256 GB
ECC сompatibility:
ECC & non-ECC
Memory channels:
Dual-channel
Memory slots type: A memory slot, also known as a memory socket or RAM slot, is what allows computer memory (RAM) to be inserted into the computer. Depending on the motherboard, there will usually be 2 to 4 memory slots (sometimes more on high-end motherboards). The most common types of RAM are SDRAM and DDR for desktop computers and SODIMM for laptop computers, each having various types and speeds.
DIMM
Number of memory slots:
4
Supported memory types: Types of memory which can be used with the product.
DDR5-SDRAM

Processor

Supported processor sockets: The sockets (plugs) for processors that are supported (can be used) by the device.
Socket AM5
Processor socket: Mechanical component(s) that provides mechanical and electrical connections between a microprocessor and a printed circuit board (PCB). This allows the processor to be replaced without soldering.
Socket AM5
Processor manufacturer: The manufacturer that produced the processor.
AMD

Description

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WH115 8 14.08.2026
146.49 €
WH155 8 14.08.2026
147.49 €
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148.99 €
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165.49 €
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Customer reviews

Customer questions

FAQ

How much does the ASRock B850 Pro-A ATX motherboard Socket AM5 cost, and is it available for purchase?

The price is 146.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 82 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 14.08.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment. All transactions are 100% secure and encrypted.

Can ASRock B850 Pro-A ATX motherboard Socket AM5 be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. We work with leading banks and leasing companies in Latvia, allowing you to make your purchase on convenient terms — with a minimal down payment and a repayment period from 3 to 36 months. You can apply for credit or installments for the ASRock B850 Pro-A ATX motherboard Socket AM5 online, and the application process is as simple as possible:
  • Select the product on the website and add it to your cart;
  • When placing your order, choose the payment method “Installments”;
  • Fill in the required details for the lending partner;
  • Receive a decision within a few minutes.
For more information about available payment options, interest-free installment terms, and credit conditions in Latvia, please visit the Payment page.

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Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

What is the warranty period?

All ASROCK products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized ASROCK service centers and through AiO.lv

Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. We will assist with consultation, warranty claim processing, and coordination with certified service centers.

How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: bios type, audio output channels, motherboard chipset, motherboard chipset family, motherboard form factor, component for, wi-fi, dvi-d ports quantity, hdmi ports quantity, vga (d-sub) ports quantity, ethernet lan (rj-45) ports, usb 3.2 gen 2 (3.1 gen 2) type-c ports quantity, usb 3.2 gen 2 (3.1 gen 2) type-a ports quantity, usb 3.2 gen 1 (3.1 gen 1) type-c ports quantity, usb 3.2 gen 1 (3.1 gen 1) type-a ports quantity, usb 2.0 ports quantity, number of sata iii connectors, usb 3.2 gen 2 (3.1 gen 2) connectors, usb 3.2 gen 1 (3.1 gen 1) connectors, usb 2.0 connectors, maximum internal memory, number of memory slots, processor socket, processor manufacturer, parallel processing technology support, supported storage drive interfaces, supported memory types, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

Where can I download the instructions for ASRock B850 Pro-A ATX motherboard Socket AM5?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.
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