# Motherboard ASRock B850M Pro RS WiFi — AMD B850, Socket AM5, microATX, DDR5, 4 DIMM, 256GB, Wi‑Fi 6E, 2.5Gb LAN, 3x M.2

**URL:** https://aio.lv/en/product--asrock-90-mxbr7-a0uayz--11245389
**Data updated:** 2026-01-21 11:08 (EET)
**Category:** Motherboards
**Manufacturer:** ASROCK
**Manufacturer code:** 90-MXBR7-A0UAYZ
**EAN:** 4711581490352
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 136.99 €
**Prices and availability valid until:** 2026-07-25 23:59
**Price without VAT (21%):** 113.21 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--asrock-90-mxbr7-a0uayz--11245389

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 10.07.2026 | free |
| Pickup points | 15.07.2026 | 1.89 EUR |
| Courier delivery to door | 15.07.2026 | 4.99 EUR |

## Summary description

ASRock B850M Pro RS WiFi is a microATX motherboard for Socket AM5 supporting AMD Ryzen 9000 series processors. It accepts DDR5 memory across 4 DIMM slots (up to 256 GB, ECC & non‑ECC) and offers Wi‑Fi 6E, Bluetooth 5.2, 2.5 Gb Ethernet, Realtek ALC897 7.1 audio, UEFI AMI BIOS, and 3 M.2 slots (one PCIe 5.0). Storage and expansion include PCIe 5.0/4.0, SATA III (4), RAID 10 and multiple USB ports. Ideal for compact gaming and productivity PCs.

## Long description

Optimized for stability, durability and efficiency, this ASRock motherboard combines reliable performance, user-friendly features and a streamlined style for daily computing tasks. It includes an 8+2+1 power phase VRM, Dr.MOS integrated power stages, Hi-Density power connectors and a 6-layer PCB to support stable CPU and memory overclocking. The board also provides PCIe Gen5 M.2 support, multiple high-speed M.2 slots, reinforced PCIe slot, onboard Wi-Fi 6E, 2.5 Gb/s LAN and versatile audio and RGB options for a balanced desktop build.
Advantages
The robust VRM design with 8+2+1 phases and Dr.MOS ensures smooth and efficient power delivery to the CPU, improving thermal performance and stability during heavy loads or overclocking. Hi-Density power connectors and a 6-layer PCB enhance current handling and signal integrity, enabling higher memory and CPU performance. High-speed storage options include PCIe Gen5 M.2 and Hyper M.2 Gen4 x4 for fast SSD throughput. Integrated Wi‑Fi 6E and 2.5 Gb/s Dragon LAN provide faster and lower-latency network connections. The board also features intelligent cooling with aluminum heatsinks, PWM/DC fan support and ASRock’s Fan‑Tastic tuning for precise fan control. Nahimic audio, Polychrome RGB and SignalRGB support add flexible multimedia and lighting customization, while dual graphics outputs and a reinforced steel PCIe slot simplify GPU installation and longevity.
Key specifications
VRM: 8+2+1 power phase design with Dr.MOS integrated power stages
Power connectors: Hi‑Density CPU and ATX power connectors for improved current handling
PCB: 6‑layer PCB for stable signals and better thermal efficiency
Memory: DDR5 support with Intel XMP and AMD EXPO profile compatibility
Storage: PCIe Gen5 Blazing M.2 and Hyper M.2 Gen4 x4 M.2 slots
Cooling: Aluminum heatsinks, M.2 bottom heatsink, PWM/DC fan headers and Fan‑Tastic tuning
Networking: Wi‑Fi 6E (802.11ax 6GHz) and Dragon 2.5 Gb/s LAN
Audio: Nahimic audio suite with noise suppression, echo cancellation and Sound Tracker
RGB: Onboard RGB and addressable RGB headers, Polychrome RGB and SignalRGB support
Expansion: Reinforced steel PCIe slot (PCIe 5.0 ready), HDMI + DisplayPort outputs
BIOS/UX: EZ BIOS flashback (USB + power), preinstalled LAN driver and preinstalled I/O shield
How to use
Install the motherboard into a compatible ATX chassis, connect the Hi‑Density CPU and ATX power connectors, and mount CPU, cooler, memory and storage according to the manufacturer’s instructions. Enable DDR5 XMP or AMD EXPO profiles in BIOS to apply pre‑tested memory overclock settings. For NVMe storage, install PCIe Gen5 or Gen4 M.2 SSDs into the designated M.2 slots and secure the M.2 heatsinks to improve thermal performance. Use the BIOS EZ Flash feature to update firmware via USB if needed. Configure fan curves through ASRock A‑Tuning Fan‑Tastic Tuning and select PWM or DC mode as detected by the fan headers. Connect network devices via onboard Wi‑Fi 6E or the 2.5 Gb/s LAN port and set up audio preferences with Nahimic software where applicable.
Recommendations
Use compatible DDR5 modules that support Intel XMP or AMD EXPO to achieve stable memory overclocking. When installing high-power CPUs or performing heavy overclocking, use a high-quality power supply and ensure good case airflow; secure the reinforced PCIe slot and use the M.2 heatsinks to maintain SSD performance.

## Specifications

### Features

| Feature | Value |
|---|---|
| Motherboard form factor | Micro ATX |
| Motherboard chipset | AMD B850 |
| Component for | PC |
| Certification | FCC, CE, ErP/EuP ready |
| Audio output channels | 7.1 |
| Windows operating systems supported | Windows 11 x64, Windows 10 x64 |
| Motherboard chipset family | AMD |

| Feature | Value |
|---|---|
| Product colour | Black |

### Processor

| Feature | Value |
|---|---|
| Processor manufacturer | AMD |
| Processor socket | Socket AM5 |

### Memory

| Feature | Value |
|---|---|
| Number of memory slots | 4 |
| Maximum internal memory | 256 GB |
| Supported memory types | DDR5-SDRAM |
| Memory channels | Dual-channel |
| Unbuffered memory | Yes |
| Memory slots type | DIMM |
| ECC сompatibility | ECC & non-ECC |

### Expansion slots

| Feature | Value |
|---|---|
| Number of M.2 (M) slots | 3 |
| PCI Express x4 (Gen 4.x) slots | 1 |
| PCI Express x16 (Gen 5.x) slots | 1 |
| 1st M.2 largest key size | 2280 |
| 2nd M.2 largest key size | 2280 |
| 3rd M.2 largest key size | 2280 |
| 1st M.2 highest PCI Express generation | 5.0 |
| 2nd M.2 highest PCI Express generation | 4.0 |
| 3rd M.2 highest PCI Express generation | 4.0 |

### Graphics

| Feature | Value |
|---|---|
| Maximum resolution | 3840 x 2160 |
| Parallel processing technology support | Not supported |
| HDCP | Yes |

### Network

| Feature | Value |
|---|---|
| Bluetooth version | 5.2 |
| Ethernet LAN | Yes |
| Bluetooth | Yes |
| LAN controller | Dragon RTL8125BG |
| Wi-Fi | Yes |
| Ethernet interface type | 2.5 Gigabit Ethernet |
| Top Wi-Fi standard | Wi-Fi 6E (802.11ax) |

### Internal I/O

| Feature | Value |
|---|---|
| USB 2.0 connectors | 2 |
| CPU fan connector | Yes |
| ATX Power connector (24-pin) | Yes |
| Number of chassis fan connectors | 3 |
| Front panel audio connector | Yes |
| TPM connector | Yes |
| EPS power connector (8-pin) | Yes |
| USB 3.2 Gen 1 (3.1 Gen 1) connectors | 3 |
| Number of SATA III connectors | 4 |
| 12V power connector | Yes |
| RGB LED pin header | Yes |
| Number of RGB LED pin headers | 1 |
| Number of CPU fan connectors | 2 |
| Number of EPS power connectors (8-pin) | 1 |

### Rear panel I/O ports

| Feature | Value |
|---|---|
| Line-in | Yes |
| USB connector type | USB Type-C, USB Type-A |
| USB 2.0 ports quantity | 4 |
| Ethernet LAN (RJ-45) ports | 1 |
| Headphone outputs | 3 |
| Microphone in | Yes |
| WiFi-AP antenna jack | 2 |
| HDMI ports quantity | 1 |
| HDMI version | 2.1 |
| DisplayPorts quantity | 1 |
| USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity | 2 |
| USB 3.2 Gen 2 (3.1 Gen 2) Type-A ports quantity | 1 |
| USB 3.2 Gen 2 (3.1 Gen 2) Type-C ports quantity | 1 |

### Storage controllers

| Feature | Value |
|---|---|
| RAID levels | 10, 1 |
| Supported storage drive types | HDD & SSD |
| RAID support | Yes |
| Number of storage drives supported | 7 |
| Supported storage drive interfaces | PCI Express 5.0, PCI Express 4.0, SATA III |

### BIOS

| Feature | Value |
|---|---|
| BIOS memory size | 256 Mbit |
| BIOS type | UEFI AMI |

### Weight & dimensions

| Feature | Value |
|---|---|
| Width | 244 mm |
| Depth | 244 mm |

### Other features

| Feature | Value |
|---|---|
| Supported processor sockets | Socket AM5 |
| Wi-Fi standards | 802.11g, 802.11b, 802.11a, Wi-Fi 6E (802.11ax), Wi-Fi 4 (802.11n), Wi-Fi 5 (802.11ac), Wi-Fi 6 (802.11ax) |
| DisplayPort version | 1.4 |
| Audio chip | Realtek ALC897 |

### Packaging content

| Feature | Value |
|---|---|
| Cables included | SATA |
| Antenna included | Yes |

## FAQ

### How much does the ASRock B850M Pro RS WiFi microATX Socket AM5 cost, and is it available for purchase?

The price is 136.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 281 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 10.07.2026 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 B850M Pro RS WiFi microATX Socket AM5 be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### Can this product be purchased for a company (with VAT)?

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. More information about warranty service: https://aio.lv/en/warranty

### How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: motherboard form factor, motherboard chipset, component for, processor socket, number of memory slots, maximum internal memory, 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 B850M Pro RS WiFi microATX 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.

## Image

https://aio.lv/img/cache/product/11245389/65439505_large.webp