# MSI PRO B550M-B Motherboard AMD B550 Socket AM4 Micro ATX DDR4

**URL:** https://aio.lv/en/product--msi-pro-b550m-b--12759018
**Data updated:** 2026-11-05 04:32 (EET)
**Category:** Motherboards
**Manufacturer:** MSI
**Manufacturer code:** PRO B550M-B
**EAN:** 4711377428927
**Warranty:** 3 Years
**Availability:** Available for order
**Price:** 90.49 €
**Prices and availability valid until:** 2026-12-15 23:59
**Price without VAT (21%):** 74.79 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--msi-pro-b550m-b--12759018

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | Tuesday | free |
| Pickup points | 23.11.2026 | 1.99 EUR |
| Courier delivery to door | 23.11.2026 | 4.99 EUR |

## Summary description

MSI PRO B550M-B Micro ATX motherboard featuring AMD B550 chipset, Socket AM4, and support for AMD Ryzen 3000, 4000, and 5000 series processors. Equipped with DDR4 memory support up to 64GB, M.2 and SATA storage interfaces, and Gigabit Ethernet.

## Long description

The MSI PRO B550M-B Motherboard AMD B550 Socket AM4 Micro ATX DDR4 is designed to deliver stable performance and reliable daily operation for professional workstations and home desktop systems. Built around the AMD B550 chipset and utilizing the AM4 socket, this micro ATX motherboard provides seamless compatibility with AMD Ryzen 3000, 4000, and 5000 series processors. It offers essential modern computing features, including high-speed DDR4 memory support, advanced storage connectivity with M.2 and SATA interfaces, and dependable network connectivity, making it a solid foundation for your next PC build.
Advantages
This motherboard incorporates a robust power design and optimized circuit layouts that ensure stable current delivery to the processor, supporting efficient multitasking and consistent daily productivity. Advanced cooling support and dedicated heatsink designs help maintain optimal operating temperatures during sustained workloads. High-quality audio capacitors and isolated circuitry deliver clear acoustic performance for multimedia applications. Furthermore, built-in safeguards such as overcurrent protection and transient voltage suppressors help protect critical hardware components against electrical fluctuations, enhancing long-term system durability.
Suitable for
Building office and business desktop computers for everyday productivity tasks
Assembling home entertainment systems and multimedia streaming stations
Setting up reliable family PCs for web browsing and educational use
Constructing entry-level gaming setups paired with compatible graphics cards
When it may not be suitable
This motherboard may not be suitable for high-end enthusiast configurations requiring multi-GPU setups or extreme processor overclocking. Due to its micro ATX form factor, it offers a limited number of expansion slots, which might restrict future hardware upgrades for users planning extensive custom modifications.
Key specifications
AMD B550 chipset with Socket AM4
Compatible with AMD Ryzen 3000, 4000, and 5000 series processors
Supports DDR4-SDRAM memory up to 64 GB across 2 DIMM slots
Storage interfaces include M.2, NVMe, PCI Express 3.0, PCI Express 4.0, and SATA
Gigabit Ethernet networking interface
Micro ATX form factor
7.1-channel audio output
How to use
Begin by installing the motherboard inside a compatible micro ATX computer case, securing it properly to the standoffs to prevent short circuits. Insert a compatible AMD Ryzen processor into the AM4 socket, followed by the DDR4 memory modules into the appropriate DIMM slots. Install your storage drives into the available M.2 or SATA ports and connect your power supply unit to the main 24-pin and CPU power connectors. Once all internal components, graphics card, and front panel cables are securely attached, connect your monitor, keyboard, and mouse, and power on the system to configure the UEFI BIOS and install your operating system.
What to consider before purchase
Verify that your computer case supports the micro ATX form factor
Ensure your chosen processor belongs to a compatible AMD Ryzen series
Check that your memory modules are DDR4-SDRAM type
Confirm that your power supply provides the necessary connectors for the system
Usage recommendations: To ensure optimal stability and longevity, always update the motherboard BIOS to the latest stable version provided by the manufacturer. Maintain adequate airflow within your computer case and regularly clean dust from the chipset and system fans to preserve cooling efficiency.

## Specifications

### Technical details

| Feature | Value |
|---|---|
| Legal guarantee | 3 year(s) |

### BIOS

| Feature | Value |
|---|---|
| System Management BIOS (SMBIOS) version | 3.7 |
| ACPI version | 6.0 |
| BIOS memory size | 256 Mbit |
| BIOS type | UEFI AMI |

### Expansion slots

| Feature | Value |
|---|---|
| 2nd M.2 highest PCI Express generation | 3.0 |
| 2nd M.2 largest key size | 22110 |
| 1st M.2 highest PCI Express generation | 4.0 |
| 1st M.2 largest key size | 2280 |
| Number of M.2 (M) slots | 2 |
| PCI Express x16 (Gen 4.x) slots | 1 |
| PCI Express x16 slots | 1 |

### Features

| Feature | Value |
|---|---|
| Windows operating systems supported | Windows 11 x64, Windows 10 x64 |
| Audio output channels | 7.1 |
| Audio chip | Realtek ALC897 |
| Motherboard chipset | AMD B550 |
| Motherboard chipset family | AMD |
| Motherboard form factor | Micro ATX |
| Component for | PC |

### Network

| Feature | Value |
|---|---|
| Wi-Fi | No |
| LAN controller | Realtek RTL8111H |
| Ethernet interface type | Gigabit Ethernet |
| Ethernet LAN | Yes |

### Rear panel I/O ports

| Feature | Value |
|---|---|
| DisplayPort version | 1.2 |
| DisplayPorts quantity | 1 |
| HDMI version | 2.1 |
| HDMI ports quantity | 1 |
| USB 3.2 Gen 1 (3.1 Gen 1) Type-C ports quantity | 1 |
| USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity | 4 |
| USB 2.0 ports quantity | 2 |

### Internal I/O

| Feature | Value |
|---|---|
| RGB LED pin header | Yes |
| TPM connector | Yes |
| Chassis intrusion connector | Yes |
| CPU fan connector | Yes |
| ATX Power connector (24-pin) | Yes |
| Front panel connector | Yes |
| Front panel audio connector | Yes |
| Total number of SATA connectors | 4 |
| Number of SATA connectors | 4 |
| Number of SATA III connectors | 4 |
| USB 3.2 Gen 2 (3.1 Gen 2) connectors | 1 |
| USB 3.2 Gen 1 (3.1 Gen 1) connectors | 2 |
| USB 2.0 connectors | 4 |

### Graphics

| Feature | Value |
|---|---|
| On-board graphics card | No |
| Parallel processing technology support | Not supported |

### Storage controllers

| Feature | Value |
|---|---|
| RAID levels | 10, 5, 1 |
| RAID support | Yes |
| Number of storage drives supported | 6 |
| Supported storage drive interfaces | SATA, PCI Express 4.0, PCI Express 3.0, M.2, NVMe |

### Memory

| Feature | Value |
|---|---|
| Unbuffered memory | Yes |
| Maximum internal memory | 64 GB |
| Supported memory clock speed (max) | 4600 MHz |
| Supported memory clock speeds | 4400, 2667, 2800, 2933, 3000, 3066, 3200, 3600, 3733, 3866, 4000, 4133, 4266, 3466, 4600 |
| ECC сompatibility | non-ECC |
| Memory channels | Dual-channel |
| Memory slots type | DIMM |
| Number of memory slots | 2 |
| Supported memory types | DDR4-SDRAM |

### Processor

| Feature | Value |
|---|---|
| Supported processor sockets | Socket AM4 |
| Compatible processor series | AMD Ryzen 5000 Series, AMD Ryzen 4000 Series, AMD Ryzen 3000 Series |
| Processor socket | Socket AM4 |
| Processor manufacturer | AMD |

## FAQ

### How much does the MSI PRO B550M-B Motherboard AMD B550 Socket AM4 Micro ATX cost, and is it available for purchase?

The price is 90.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 100 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 Tuesday 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 MSI PRO B550M-B Motherboard AMD B550 Socket AM4 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 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: bios type, audio output channels, motherboard chipset, motherboard chipset family, motherboard form factor, component for, wi-fi, dvi-d ports quantity, hdmi ports quantity, vga (d-sub) ports quantity, ethernet lan (rj-45) ports, usb 3.2 gen 2 (3.1 gen 2) type-c ports quantity, usb 3.2 gen 2 (3.1 gen 2) type-a ports quantity, usb 3.2 gen 1 (3.1 gen 1) type-c ports quantity, usb 3.2 gen 1 (3.1 gen 1) type-a ports quantity, usb 2.0 ports quantity, number of sata iii connectors, usb 3.2 gen 2 (3.1 gen 2) connectors, usb 3.2 gen 1 (3.1 gen 1) connectors, usb 2.0 connectors, maximum internal memory, number of memory slots, processor socket, processor manufacturer, parallel processing technology support, supported storage drive interfaces, supported memory types, compatible processor series, 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 MSI PRO B550M-B Motherboard AMD B550 Socket AM4 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

https://aio.lv/img/cache/product/12759018/70890318_large.webp