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header-product Motherboard ASUS Prime B550M-A/CSM AMD B550 Socket AM4 micro ATX
89.99 €

Motherboard ASUS Prime B550M-A/CSM AMD B550 Socket AM4 micro ATX

Motherboard ASUS Prime B550M-A/CSM, 90MB14I0-M0EAYC Photo 1
Motherboard ASUS Prime B550M-A/CSM, 90MB14I0-M0EAYC Photo 2
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Motherboard ASUS Prime B550M-A/CSM, 90MB14I0-M0EAYC Photo 1
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Motherboard ASUS Prime B550M-A/CSM AMD B550 Socket AM4 micro ATX

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Short description

The ASUS Prime B550M-A/CSM motherboard supports AMD Ryzen 3000 series processors with Socket AM4. It features DDR4 memory support up to 128 GB, DIMM slots, and storage interfaces including M.2 and SATA III. With Gigabit Ethernet and a Realtek RTL8111H LAN controller, this micro ATX motherboard is ideal for building a powerful PC.
Available at price 89.99 €: 6 pcs.
Total available for order: 228 pcs.
Warranty: 2 Years
SKU: 3614649
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Customer service center
2b. Kengaraga str., Riga, Latvia, LV-1063
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17.07.2026 {{selectedOffer.courierDeliveryString}}
From 4.99 € (Weight: 0.98 kg)
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36 months installment: from 2.50 euros per month
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Product information

Description

The ASUS Prime B550M-A/CSM is a micro ATX motherboard for Socket AM4 supporting 3rd Generation AMD Ryzen processors. It offers DDR4 memory support up to 128 GB across four DIMM slots, dual M.2 slots including a PCIe 4.0-capable M.2 for high-speed NVMe storage, SATA 6 Gbps ports, Gigabit Ethernet, multiple display outputs (HDMI, D-Sub, DVI), USB 3.2 Gen 2 Type-A and Aura Sync RGB header support. This Corporate Stable Model (CSM) board includes ASUS Control Center Express for business IT management and benefits from extended lifecycle support and firmware features tailored for reliable daily and enterprise use.

Advantages

The Prime B550M-A/CSM combines a robust power design with comprehensive cooling solutions, including VRM heatsink and thermal pads, plus hybrid fan headers for stable operation under load. PCIe 4.0 M.2 support enables up to 64 Gbps transfer speeds for compatible NVMe drives and RAID configurations. Onboard audio improvements such as audio shielding, separate left/right PCB layers and premium Japanese capacitors reduce interference and improve fidelity. The motherboard also provides flexible tuning options via intuitive firmware and software tools and includes ASUS Control Center Express to simplify IT endpoint management and maintenance.

Suitable for

  • Home and office PCs based on AMD Ryzen 3rd Gen processors
  • Compact micro ATX builds requiring multiple storage options (M.2 + SATA)
  • Small business environments needing centralized IT management and lifecycle stability
  • Systems prioritizing high-speed NVMe storage and PCIe 4.0 capability

Key specifications

  • Form factor: Micro ATX
  • Chipset: AMD B550
  • CPU socket: Socket AM4 (3rd Gen Ryzen compatible)
  • Memory: 4 x DDR4 DIMM slots, up to 128 GB
  • M.2: Dual M.2 slots, one supporting PCIe 4.0 (up to 22110, up to ~64 Gbps)
  • SATA: SATA III 6 Gbps ports
  • PCIe: PCIe 4.0 support on compatible lanes; PCIe x1 Gen3 slots: 2
  • Networking: 1 Gb Ethernet (Realtek RTL8111H)
  • Rear I/O: HDMI, D-Sub, DVI, USB 3.2 Gen 2 Type-A
  • Audio: Onboard audio with shielding, separate left/right layers and premium capacitors
  • Brand/Model: ASUS Prime B550M-A/CSM (MPN: 90MB14I0-M0EAYC, EAN: 4718017755535)

How to use

Install the ASUS Prime B550M-A/CSM into a compatible micro ATX chassis and fit a supported AM4 processor, cooling solution and DDR4 memory modules (up to 128 GB across four slots). Connect NVMe M.2 SSDs and/or SATA drives to the respective connectors and attach power, front-panel headers and case fans to the onboard connectors. Use the firmware (UEFI) and bundled ASUS utilities to configure storage RAID, tune performance settings and enable Aura Sync RGB lighting if applicable. For business deployments, install and configure ASUS Control Center Express to manage updates, monitor endpoints and apply grouping policies.

Usage recommendations

For stable operation and optimal cooling, use a compatible CPU cooler for your Ryzen processor, ensure proper case airflow and install the VRM heatsink thermal pads where applicable. Keep BIOS and ASUS Control Center Express updated and schedule off-peak firmware or software updates for enterprise environments to minimize disruption.

Specifications

Motherboard form factor:
Micro ATX
Motherboard chipset:
AMD B550
Component for:
PC
Processor socket:
Socket AM4
Number of memory slots:
4
Maximum internal memory:
128 GB
PCI Express x1 (Gen 3.x) slots:
2
Weight:
0.845 kg
Supported memory types:
DDR4-SDRAM
All features

Features

Motherboard form factor:
Micro ATX
Motherboard chipset:
AMD B550
Component for:
PC
Audio output channels:
7.1
Windows operating systems supported:
Windows 10 x64
Motherboard chipset family:
AMD
Product colour:
Black, Silver

Processor

Processor manufacturer:
AMD
Processor socket:
Socket AM4

Memory

Number of memory slots:
4
Maximum internal memory:
128 GB
Supported memory types:
DDR4-SDRAM
Supported memory clock speeds:
4000, 3866, 2133, 2400, 2666, 2800, 3000, 3200, 4133, 4266, 4400, 4600, 3333, 3466, 3600, 3733
Unbuffered memory:
Yes
Memory slots type:
DIMM

Expansion slots

PCI Express x1 (Gen 3.x) slots:
2
PCI Express x16 (Gen 4.x) slots:
1

Graphics

On-board graphics card:
No

Network

Ethernet LAN:
Yes
LAN controller:
Realtek RTL8111H
Wi-Fi:
No
Ethernet interface type:
Gigabit Ethernet

Internal I/O

Number of SATA connectors:
0
USB 2.0 connectors:
2
CPU fan connector:
Yes
ATX Power connector (24-pin):
Yes
Number of chassis fan connectors:
2
Number of Parallel ATA connectors:
0
Front panel audio 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
Number of SATA II connectors:
0
USB 3.2 Gen 2 (3.1 Gen 2) connectors:
0

Rear panel I/O ports

PS/2 ports quantity:
1
USB 2.0 ports quantity:
0
Ethernet LAN (RJ-45) ports:
1
Headphone outputs:
1
Microphone in:
Yes
VGA (D-Sub) ports quantity:
1
DVI-D ports quantity:
1
HDMI ports quantity:
1
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity:
4
USB 3.2 Gen 1 (3.1 Gen 1) Type-C ports quantity:
0
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:
0

Storage controllers

Supported storage drive interfaces:
M.2, SATA III

BIOS

BIOS memory size:
256 Mbit
BIOS type:
UEFI AMI
Clear CMOS jumper:
Yes

Weight & dimensions

Width:
244 mm
Depth:
244 mm

Other features

Weight:
0.845 kg
Height:
51 mm
mSATA ports quantity:
0
Audio chip:
Realtek ALC887

Logistics data

Harmonized System (HS) code:
84733020

Description

Machine translation. Load original

Reasons to buy

All-around Energy Efficiency

With the Energy Processing Unit (EPU), you'll enjoy system-wide power savings. The EPU automatically optimizes power consumption and maximizes savings with Away mode.

Flexible Cooling Controls

Fan Xpert 2+ software provides comprehensive control over system fans. Auto-Tuning mode intelligently configures all parameters with a single click. There's also an Extreme Quiet mode that reduces chassis fan speeds below the default minimum to keep your system whisper-quiet during light tasks. Fans can also be controlled via the UEFI BIOS.Flexible Cooling Controls

Precise Digital Power Control

The Digi+ voltage-regulator module (VRM) delivers real-time control over voltage droop, automatically switching frequency and power-efficiency settings. It also allows you to fine-tune your CPU for improved stability and performance.

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Stock data
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WH355 6 14.07.2026 89.99 €
EU85 20 09.07.2026 92.49 €
WH115 100 09.07.2026 92.99 €
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WH109 4 23.07.2026 133.99 €
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92.99 €
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141.99 €
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151.99 €
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Customer reviews

Customer questions

FAQ

How much does the Motherboard ASUS Prime B550M-A/CSM, 90MB14I0-M0EAYC cost, and is it available for purchase?

The price is 89.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 228 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 14.07.2026 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 B550M-A/CSM, 90MB14I0-M0EAYC be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. We work with leading banks and leasing companies in Latvia, allowing you to make your purchase on convenient terms — with a minimal down payment and a repayment period from 3 to 36 months. You can apply for credit or installments for the Motherboard ASUS Prime B550M-A/CSM, 90MB14I0-M0EAYC online, and the application process is as simple as possible:
  • Select the product on the website and add it to your cart;
  • When placing your order, choose the payment method “Installments”;
  • Fill in the required details for the lending partner;
  • Receive a decision within a few minutes.
For more information about available payment options, interest-free installment terms, and credit conditions in Latvia, please visit the Payment page.

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. We will assist with consultation, warranty claim processing, and coordination with certified service centers.

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 Motherboard ASUS Prime B550M-A/CSM, 90MB14I0-M0EAYC?

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.
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