# Motherboard ASROCK B850 Steel Legend WiFi ATX — AMD B850, Socket AM5, DDR5, 4x DIMM, 4x M.2, Wi‑Fi 7, 2.5Gb LAN

**URL:** https://aio.lv/en/product--asrock-90-mxbqs-a0uayz--11227466
**Data updated:** 2026-01-21 11:08 (EET)
**Category:** Motherboards
**Manufacturer:** ASROCK
**Manufacturer code:** 90-MXBQS-A0UAYZ
**EAN:** 4711581490062
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 197.99 €
**Prices and availability valid until:** 2026-08-04 23:59
**Price without VAT (21%):** 163.63 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--asrock-90-mxbqs-a0uayz--11227466

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 20.07.2026 | free |
| Pickup points | 23.07.2026 | 1.89 EUR |
| Courier delivery to door | 23.07.2026 | 4.99 EUR |

## Summary description

ASROCK B850 Steel Legend WiFi is an ATX motherboard for Socket AM5 processors (AMD Ryzen 9000 series). It supports up to 256 GB DDR5 (4 DIMM, dual‑channel, ECC & non‑ECC), four M.2 slots (one PCIe 5.0, others PCIe 4.0), SATA III (4 ports), RAID 10, and 2.5 Gigabit Ethernet. Integrated Wi‑Fi 7 and Bluetooth 5.4, HDMI 2.1, multiple USB 3.2/2.0 ports, Realtek ALC4082 7.1 audio and extensive connectors for cooling and RGB make it suitable for gaming, content creation and high‑performance systems.

## Long description

The ASRock B850 Steel Legend WiFi ATX motherboard supports AMD Socket AM5 processors including Ryzen 7000, 8000 and 9000 series. Built for high-performance desktop systems, it accepts up to 256 GB DDR5 memory, offers multiple high-speed storage options including PCIe 5.0 M.2 and PCIe 4.0 M.2 slots, integrated Wi‑Fi 7 and 2.5 Gb/s LAN, and provides a robust power delivery and cooling design for stable operation under load.
Advantages
This motherboard features an optimized VRM with an exclusive 20K 1000uF capacitor, a 14+2+1 power phase design with integrated Dr.MOS stages and Hi‑Density power connectors, and an 8‑layer PCB to improve stability, thermal performance and energy efficiency. Storage support includes PCIe Gen5 Blazing M.2 and Hyper M.2 Gen4 x4, while connectivity is enhanced by Wi‑Fi 7, a front-panel USB 3.2 Gen2x2 Type‑C header and Dragon 2.5 Gb/s LAN. Additional usability is provided by enlarged M.2 heatsinks with anti-drop screws, toolless M.2 installation, PWM/DC fan detection, thermistor headers and ASRock Fan‑Tastic tuning.
Suitable for
High-performance gaming desktops with AMD Ryzen AM5 processors
Content creators and workstation users requiring fast storage and networking
Enthusiasts who overclock DDR5 memory and CPUs
Custom PC builders seeking a feature-rich ATX motherboard with modern I/O
Key specifications
Chipset: AMD B850
Form factor: ATX
CPU socket: Socket AM5 (supports Ryzen 7000/8000/9000 series)
Memory: 4 × DDR5 slots, up to 256 GB, XMP/EXPO support
Power design: 14+2+1 phases, Dr.MOS, Hi‑Density power connector, exclusive 20K 1000uF capacitor
PCB: 8‑layer PCB
Storage: PCIe Gen5 M.2 (Blazing M.2), PCIe Gen4 M.2 (Hyper M.2 Gen4 x4), SATA III
Networking: Wi‑Fi 7, Dragon 2.5 Gb/s LAN
USB: Front-panel USB 3.2 Gen2x2 Type‑C header (20 Gbps), multiple rear USB ports
Audio: Nahimic audio features (noise suppression, echo cancellation, voice stabilizer, sound tracker)
How to use
Install the ASRock B850 Steel Legend WiFi into a compatible ATX chassis, mount an AM5 CPU and DDR5 memory modules into the provided sockets, then connect power using the Hi‑Density CPU and ATX power connectors. For high‑speed storage, install M.2 SSDs into the designated M.2 slots and secure them using the enlarged M.2 heatsink with anti‑drop screw or the toolless quick‑release mechanism. Configure fan control, thermistor inputs and fan curves via the UEFI or ASRock Fan‑Tastic Tuning utility. Enable Intel XMP or AMD EXPO profiles in BIOS to apply pretested DDR5 overclocking settings if memory modules support them.
Usage recommendations
For reliable overclocking and sustained performance, use high‑quality power supplies rated to handle increased CPU and memory currents, keep M.2 SSDs cooled with the provided heatsinks, and update the motherboard BIOS to the latest version before applying aggressive memory or CPU overclocks. Monitor temperatures via thermistor headers and adjust fan curves to maintain system stability.

## Specifications

### Features

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

| Feature | Value |
|---|---|
| Product colour | White |

### 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 | 4 |
| PCI Express x16 (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 |
| 4th 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 |
| 4th 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 | 5.4 |
| 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 7 (802.11be) |

### 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 | 2 |
| Number of SATA III connectors | 4 |
| 12V power connector | Yes |
| RGB LED pin header | Yes |
| USB 3.2 Gen 2x2 connectors | 1 |
| Number of RGB LED pin headers | 1 |
| Number of CPU fan connectors | 2 |
| Number of EPS power connectors (8-pin) | 2 |

### 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 | 2 |
| Microphone in | Yes |
| S/PDIF out port | Yes |
| WiFi-AP antenna jack | 2 |
| HDMI ports quantity | 1 |
| HDMI version | 2.1 |
| USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity | 3 |
| USB 3.2 Gen 2 (3.1 Gen 2) Type-A ports quantity | 2 |
| USB 3.2 Gen 2 (3.1 Gen 2) Type-C ports quantity | 2 |

### Storage controllers

| Feature | Value |
|---|---|
| RAID levels | 10, 1 |
| Supported storage drive types | HDD & SSD |
| RAID support | Yes |
| Number of storage drives supported | 8 |
| 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 | 305 mm |
| Depth | 244 mm |

### Other features

| Feature | Value |
|---|---|
| Supported processor sockets | Socket AM5 |
| Wi-Fi standards | Wi-Fi 4 (802.11n), 802.11g, 802.11b, 802.11a, Wi-Fi 5 (802.11ac), Wi-Fi 7 (802.11be), Wi-Fi 6 (802.11ax), Wi-Fi 6E (802.11ax) |
| Audio chip | Realtek ALC4082 |

### Packaging content

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

## FAQ

### How much does the ASROCK B850 Steel Legend WiFi ATX motherboard cost, and is it available for purchase?

The price is 197.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 216 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 20.07.2026 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 B850 Steel Legend WiFi ATX motherboard 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 B850 Steel Legend WiFi ATX motherboard?

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/11227466/62722199_large.webp