# Asus PRIME B840M-R Motherboard, AMD B840 Chipset, Socket AM5, Micro ATX, DDR5 Support

**URL:** https://aio.lv/en/product--asus-90mb1pt0-m0eay0--12422888
**Data updated:** 2026-05-10 01:47 (EEST)
**Category:** Motherboards
**Manufacturer:** Asus
**Manufacturer code:** 90MB1PT0-M0EAY0
**EAN:** 4711636560696
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 131.99 €
**Prices and availability valid until:** 2026-07-21 23:59
**Price without VAT (21%):** 109.08 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--asus-90mb1pt0-m0eay0--12422888

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 09.07.2026 | free |
| Pickup points | 14.07.2026 | 1.89 EUR |
| Courier delivery to door | 14.07.2026 | 4.99 EUR |

## Summary description

The Asus PRIME B840M-R is a reliable Micro ATX motherboard featuring the AMD B840 chipset and Socket AM5, designed for AMD Ryzen 7000, 8000, and 9000 series processors. It supports DDR5-SDRAM memory up to 128 GB across two DIMM slots. Equipped with M.2 and SATA III interfaces for flexible storage, it offers Gigabit Ethernet connectivity and RAID support, making it an ideal foundation for a stable and efficient desktop PC build.

## Long description

The Asus PRIME B840M-R is a reliable Micro ATX motherboard featuring the AMD B840 chipset and Socket AM5, designed for AMD Ryzen 7000, 8000, and 9000 series processors. It supports DDR5-SDRAM memory up to 128 GB across two DIMM slots. Equipped with M.2 and SATA III interfaces for flexible storage, it offers Gigabit Ethernet connectivity and RAID support, making it an ideal foundation for a stable and efficient desktop PC build.
Advantages
This motherboard is expertly engineered to unleash the full potential of modern AMD Ryzen processors. It provides users and PC builders with a range of performance optimizations through intuitive software and firmware features. The board is designed to be Advanced AI PC-ready, offering the necessary power and connectivity to handle demanding AI applications and multitasking workflows efficiently.
Suitable for
Building a modern desktop PC for home or office use
Systems requiring support for AMD Ryzen 7000, 8000, and 9000 series processors
Users looking for a compact Micro ATX form factor
Workloads that benefit from high-speed DDR5 memory and AI-ready hardware
When it may not be suitable
This motherboard may not be suitable for users requiring extensive multi-GPU setups or those needing more than two memory slots for specific memory configurations. It is also not intended for high-end workstation builds that require a larger ATX form factor for additional expansion cards.
Key specifications
Socket AM5 for AMD Ryzen 7000, 8000, and 9000 series
Micro ATX form factor
Supports DDR5-SDRAM up to 128 GB via 2 DIMM slots
Storage interfaces: M.2 and SATA III with RAID 0, 1, 5, 10 support
Gigabit Ethernet connectivity
7.1 channel audio support
UEFI AMI 256 Mbit BIOS
How to use
To use the Asus PRIME B840M-R, install the motherboard into a compatible Micro ATX case and secure it with the appropriate screws. Insert your AMD Ryzen processor into the Socket AM5, ensuring the alignment marks match. Install your DDR5 memory modules into the two DIMM slots until they click into place. Connect your storage drives via the M.2 or SATA III ports and attach the necessary power cables from your power supply unit. Once assembled, connect your peripherals and monitor, then access the UEFI BIOS to configure your system settings and install your operating system.
What to consider before purchase
Ensure your computer case supports the Micro ATX form factor
Verify that your processor is compatible with the Socket AM5 platform
Check if your power supply unit provides the necessary connectors for the motherboard
Confirm that your storage drives are compatible with the M.2 or SATA III interfaces
Usage recommendations: Always update the BIOS to the latest version available on the manufacturer's website to ensure optimal compatibility with the latest processor series and to access the newest performance features.

## 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 10 x64, Windows 11 |
| Motherboard chipset family | AMD |

| Feature | Value |
|---|---|
| Product colour | Multicolour |

### Processor

| Feature | Value |
|---|---|
| Processor manufacturer | AMD |
| Compatible processor series | AMD Ryzen 7000 Series, AMD Ryzen 8000 Series, AMD Ryzen 9000 Series |
| Processor socket | Socket AM5 |

### Memory

| Feature | Value |
|---|---|
| Number of memory slots | 2 |
| Maximum internal memory | 128 GB |
| Supported memory types | DDR5-SDRAM |
| Memory channels | Dual-channel |
| Unbuffered memory | Yes |
| Memory slots type | DIMM |
| Supported memory clock speed (max) | 7600 MHz |
| ECC сompatibility | non-ECC |

### Expansion slots

| Feature | Value |
|---|---|
| PCI Express x1 (Gen 3.x) slots | 1 |
| Number of M.2 (M) slots | 2 |
| 1st M.2 largest key size | 2280 |

### Graphics

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

### Network

| Feature | Value |
|---|---|
| Ethernet LAN | Yes |
| Wi-Fi | No |
| Ethernet interface type | Gigabit Ethernet |

### 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 | 2 |
| Front panel audio connector | Yes |
| TPM connector | Yes |
| EPS power connector (8-pin) | Yes |
| USB 3.2 Gen 1 (3.1 Gen 1) connectors | 1 |
| Number of SATA III connectors | 4 |
| 12V power connector | Yes |
| Number of CPU fan connectors | 1 |

### Rear panel I/O ports

| Feature | Value |
|---|---|
| PS/2 ports quantity | 1 |
| Line-in | Yes |
| USB connector type | USB Type-A |
| USB 2.0 ports quantity | 2 |
| Ethernet LAN (RJ-45) ports | 1 |
| Headphone outputs | 1 |
| Microphone in | Yes |
| HDMI ports quantity | 1 |
| DisplayPorts quantity | 1 |
| USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity | 4 |

### Storage controllers

| Feature | Value |
|---|---|
| RAID levels | 5, 10, 1 |
| Supported storage drive types | HDD & SSD |
| RAID support | Yes |
| Number of storage drives supported | 6 |
| 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 | 236 mm |
| Depth | 229 mm |

### Other features

| Feature | Value |
|---|---|
| Number of HDDs supported | 4 |
| Weight | 0.563 kg |
| Package weight | 924 g |
| Height | 36.5 mm |

### Packaging data

| Feature | Value |
|---|---|
| Package depth | 270 mm |
| Package height | 51.5 mm |
| Package width | 260 mm |

## FAQ

### How much does the Asus PRIME B840M-R Motherboard \| Socket AM5 Micro ATX cost, and is it available for purchase?

The price is 131.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 28 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 09.07.2026 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 Asus PRIME B840M-R Motherboard \| Socket AM5 Micro ATX 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 x1 (gen 3.x) slots, weight, 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 Asus PRIME B840M-R Motherboard \| Socket AM5 Micro ATX?

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

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