# MSI PRO B840M-B motherboard AMD B840 Socket AM5 micro ATX

**URL:** https://aio.lv/en/product--msi-7e76-002r--11463502
**Data updated:** 2025-12-30 21:24 (EET)
**Category:** Motherboards
**Manufacturer:** MSI
**Manufacturer code:** 7E76-002R
**EAN:** 4711377360166
**Warranty:** 3 Years
**Availability:** Available for order
**Price:** 90.99 €
**Prices and availability valid until:** 2026-07-29 23:59
**Price without VAT (21%):** 75.20 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--msi-7e76-002r--11463502

## Delivery options

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

## Summary description

The MSI PRO B840M-B motherboard features an AMD B840 chipset and Socket AM5, compatible with AMD Ryzen 7000/8000/9000 series processors. It supports DDR5 memory up to 128GB and offers multiple storage options including M.2 and SATA III for HDD and SSD drives. With a micro ATX form factor, it is designed for compact PC builds. The board includes a 2.5 Gigabit Ethernet interface for high-speed networking, making it suitable for both gaming and professional use.

## Long description

The MSI PRO B840M-B is a micro ATX motherboard with the AMD B840 chipset and Socket AM5, compatible with AMD Ryzen 7000, 8000 and 9000 series desktop processors. It supports DDR5 memory in dual-channel configuration up to 128 GB and offers multiple storage options including Lightning Gen 4 x4 M.2 and SATA III for HDDs and SSDs. The board features a Direct 7+2+1 digital power design with an 8-pin CPU connector, an optimized chipset heatsink for quieter operation and dust reduction, and a 2.5 Gigabit Ethernet interface for high-bandwidth, low-latency networking.
Advantages
The PRO B840M-B provides stable power delivery through a 7+2+1 VRM phase layout and P-PAK components to sustain heavy workloads. Support for DDR5-8000+ (OC), a 6-layer PCB with 2oz thickened copper, and Core Boost and Memory Boost technologies improve overall performance. Quick-install features such as EZ M.2 Clip II and EZ PCIe Clip II simplify assembly. Integrated audio codecs and PCIe 4.0 expansion ensure broad compatibility for professional and multimedia use.
Suitable for
Compact professional workstations requiring reliable multi-core CPU performance
Home or office PCs with high-speed networking needs (2.5G LAN)
Builders wanting DDR5 support and PCIe 4.0 storage for fast boot and load times
Key specifications
Chipset: AMD B840
CPU support: AMD Ryzen 7000 / 8000 / 9000 Series (Socket AM5)
Memory: DDR5, 2 DIMM, dual channel, up to 128 GB, DDR5-8000+ (OC)
Form factor: Micro ATX
Power design: Direct 7+2+1 digital power phases, 8-pin CPU power connector
Storage: Lightning Gen 4 x4 M.2, M.2 slots and SATA III ports, up to 6 storage drives supported
LAN: 2.5 Gigabit Ethernet
Audio: Realtek ALC897, 7.1 channels
BIOS: UEFI AMI 256 Mbit, ACPI 6.5
How to use
Install the motherboard into a compatible micro ATX case and connect an AM5-compatible Ryzen processor. Populate up to two DDR5 DIMMs following the motherboard manual for optimal dual-channel operation. Connect the 8-pin CPU power cable from a compatible PSU and attach storage devices to the M.2 slots and SATA III ports as needed. Use the EZ M.2 Clip II and EZ PCIe Clip II to secure expansion devices without screws. After assembly, enter the UEFI BIOS to configure memory profiles, storage boot order and network settings.
Usage recommendations
For stable operation under sustained loads, use a quality PSU with the required 8-pin CPU connector, install adequate cooling for the CPU and chassis, and update the BIOS to the latest version before first use. Enable memory XMP/EXPO profiles in BIOS only after confirming memory compatibility.

## 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 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 | 2 |
| Maximum internal memory | 128 GB |
| Supported memory types | DDR5-SDRAM |
| Supported memory clock speeds | 5600, 4800 |
| Memory channels | Dual-channel |
| Memory slots type | DIMM |
| Supported memory clock speed (max) | 8000 MHz |
| ECC сompatibility | non-ECC |

### Expansion slots

| Feature | Value |
|---|---|
| PCI Express x16 slots | 2 |
| Number of M.2 (M) slots | 2 |
| 1st M.2 largest key size | 2280 |
| 2nd M.2 largest key size | 2280 |
| 1st M.2 highest PCI Express generation | 4.0 |
| 2nd M.2 highest PCI Express generation | 4.0 |

### Graphics

| Feature | Value |
|---|---|
| On-board graphics card | No |

### Network

| Feature | Value |
|---|---|
| Ethernet LAN | Yes |
| Wi-Fi | No |
| Ethernet interface type | 2.5 Gigabit Ethernet |

### Internal I/O

| Feature | Value |
|---|---|
| USB 2.0 connectors | 4 |
| Number of chassis fan connectors | 5 |
| USB 3.2 Gen 1 (3.1 Gen 1) connectors | 2 |
| Number of SATA III connectors | 4 |
| USB 3.2 Gen 2 (3.1 Gen 2) connectors | 1 |
| Total number of SATA connectors | 4 |
| RGB LED pin header | Yes |
| Number of RGB LED pin headers | 3 |
| Number of CPU fan connectors | 1 |
| Number of water pump connectors | 1 |

### Rear panel I/O ports

| Feature | Value |
|---|---|
| USB 2.0 ports quantity | 2 |
| Ethernet LAN (RJ-45) ports | 1 |
| HDMI ports quantity | 1 |
| HDMI version | 2.1 |
| USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity | 4 |

### Storage controllers

| Feature | Value |
|---|---|
| RAID levels | 1, 10 |
| Supported storage drive types | HDD & SSD |
| RAID support | Yes |
| Number of storage drives supported | 6 |
| Supported storage drive interfaces | Micro SATA III, M.2 |

### BIOS

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

### Weight & dimensions

| Feature | Value |
|---|---|
| Width | 226 mm |
| Depth | 243.8 mm |

### Other features

| Feature | Value |
|---|---|
| Number of HDDs supported | 4 |
| Supported processor sockets | Socket AM5 |
| Audio chip | Realtek ALC897 |

## FAQ

### How much does the Motherboard MSI PRO B840M-B cost, and is it available for purchase?

The price is 90.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 196 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 Thursday 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: Cash payment, Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment. All transactions are 100% secure and encrypted.

### Can Motherboard MSI PRO B840M-B 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 MSI 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 MSI 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 Motherboard MSI PRO B840M-B?

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/11463502/66602711_large.webp