# Motherboard ASUS PRIME B840M-A WIFI AMD B840 Socket AM5 micro ATX

**URL:** https://aio.lv/en/product--asus-90mb1j20-m0eay0--11227452
**Data updated:** 2025-12-13 07:39 (EET)
**Category:** Motherboards
**Manufacturer:** Asus
**Manufacturer code:** 90MB1J20-M0EAY0
**EAN:** 4711387797143
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 146.99 €
**Prices and availability valid until:** 2026-07-23 23:59
**Price without VAT (21%):** 121.48 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--asus-90mb1j20-m0eay0--11227452

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 07.07.2026 | free |
| Pickup points | 10.07.2026 | 1.89 EUR |
| Courier delivery to door | 10.07.2026 | 4.99 EUR |

## Summary description

The ASUS PRIME B840M-A WIFI motherboard features an AMD B840 chipset and Socket AM5, supporting AMD Ryzen 7000, 8000, and 9000 series processors. It supports DDR5 memory up to 192 GB and offers multiple storage options with M.2 and SATA III interfaces. With 2.5 Gigabit Ethernet and Wi-Fi 6E, it ensures high-speed connectivity. The micro ATX form factor makes it suitable for compact builds.

## Long description

The ASUS PRIME B840M-A WIFI motherboard is designed to support AMD Ryzen™ 9000 series processors and to serve as a foundation for custom desktop systems. It offers a micro-ATX form factor with integrated Wi‑Fi connectivity and a feature set aimed at stable platform performance, system tuning and connectivity for everyday computing and AI workloads.
Advantages
The PRIME B840M-A WIFI provides a balance of performance and connectivity with built-in Wi‑Fi, multiple expansion options and firmware/software utilities for system optimization. It is prepared for Advanced AI PC use, enabling users to run AI applications that require reliable processing and network access. The board is suitable for PC builders seeking a compact, capable motherboard for Ryzen 9000 CPUs.
Key specifications
 Form factor: micro-ATX
 Compatible CPUs: AMD Ryzen™ 9000 series
 Integrated wireless: Wi‑Fi (onboard)
 Series: ASUS PRIME B840M-A WIFI
 Target use: desktop PC building, AI-ready platform
How to use
Install the motherboard into a compatible micro-ATX case, fit a supported AMD Ryzen™ 9000 series processor, install memory modules and connect storage and power according to the manual. Use the included UEFI firmware and ASUS utilities to update drivers, adjust system settings and enable network connectivity. For AI workloads, ensure appropriate cooling, install required software frameworks and connect to a reliable network via the onboard Wi‑Fi or wired LAN.
Recommendations
Follow ASUS installation guidelines and update the UEFI firmware before first use. Pair the PRIME B840M-A WIFI with certified memory and a compatible power supply. For AI applications, verify software compatibility with Ryzen 9000 CPUs and ensure sufficient cooling and power delivery.

## Specifications

### Features

| Feature | Value |
|---|---|
| Motherboard form factor | Micro ATX |
| Motherboard chipset | AMD B840 |
| Component for | PC |
| Audio output channels | 7.1 |
| Windows operating systems supported | Windows 11, Windows 10 x64 |
| Motherboard chipset family | AMD |

### Processor

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

### Memory

| Feature | Value |
|---|---|
| Number of memory slots | 4 |
| Maximum internal memory | 192 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 |
|---|---|
| PCI Express x16 (Gen 3.x) slots | 2 |
| Number of M.2 (M) slots | 3 |
| PCI Express x16 (Gen 4.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 | 4.0 |
| 2nd M.2 highest PCI Express generation | 4.0 |
| 3rd M.2 highest PCI Express generation | 3.0 |

### Graphics

| Feature | Value |
|---|---|
| Parallel processing technology support | Not supported |

### Network

| Feature | Value |
|---|---|
| Bluetooth version | 5.3 |
| Ethernet LAN | Yes |
| Bluetooth | Yes |
| 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 |
| S/PDIF out connector | Yes |
| CPU fan connector | Yes |
| Number of COM connectors | 1 |
| ATX Power connector (24-pin) | Yes |
| Number of chassis fan connectors | 3 |
| Front panel audio connector | Yes |
| TPM connector | Yes |
| USB 3.2 Gen 1 (3.1 Gen 1) connectors | 2 |
| Number of SATA III connectors | 4 |
| Front panel connector | Yes |
| 12V power connector | Yes |

### Rear panel I/O ports

| Feature | Value |
|---|---|
| USB 2.0 ports quantity | 4 |
| Ethernet LAN (RJ-45) ports | 1 |
| WiFi-AP antenna jack | 1 |
| HDMI ports quantity | 1 |
| DisplayPorts quantity | 2 |
| USB 3.2 Gen 1 (3.1 Gen 1) Type-C ports quantity | 1 |
| USB 3.2 Gen 2 (3.1 Gen 2) Type-A ports quantity | 2 |

### Storage controllers

| Feature | Value |
|---|---|
| RAID levels | 10, 5, 1 |
| Supported storage drive types | HDD & SSD |
| RAID support | Yes |
| Number of storage drives supported | 7 |
| Supported storage drive interfaces | SATA III, M.2 |

### 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 |
|---|---|
| Number of HDDs supported | 4 |
| Supported processor sockets | Socket AM5 |
| Wi-Fi standards | Wi-Fi 6E (802.11ax) |
| Package weight | 1520 g |

### Packaging content

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

### Packaging data

| Feature | Value |
|---|---|
| Package depth | 275 mm |
| Package height | 67.5 mm |
| Package width | 275 mm |

## FAQ

### How much does the Motherboard ASUS PRIME B840M-A WIFI, 90MB1J20-M0EAY0 cost, and is it available for purchase?

The price is 146.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 214 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 07.07.2026 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 Motherboard ASUS PRIME B840M-A WIFI, 90MB1J20-M0EAY0 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 Asus 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 Asus 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, pci express x16 (gen 3.x) slots, 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 Motherboard ASUS PRIME B840M-A WIFI, 90MB1J20-M0EAY0?

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/11227452/65437011_large.webp