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

**URL:** https://aio.lv/en/product--asus-90mb14i0-m0eayc--3614649
**Data updated:** 2026-02-17 11:44 (EET)
**Category:** Motherboards
**Manufacturer:** Asus
**Manufacturer code:** 90MB14I0-M0EAYC
**EAN:** 4718017755535
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 89.99 €
**Prices and availability valid until:** 2026-07-23 23:59
**Price without VAT (21%):** 74.37 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--asus-90mb14i0-m0eayc--3614649

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 14.07.2026 | free |
| Pickup points | 17.07.2026 | 1.89 EUR |
| Courier delivery to door | 17.07.2026 | 4.99 EUR |

## Summary 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.

## Long 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

### Features

| Feature | Value |
|---|---|
| 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 |

| Feature | Value |
|---|---|
| Product colour | Black, Silver |

### Processor

| Feature | Value |
|---|---|
| Processor manufacturer | AMD |
| Processor socket | Socket AM4 |

### Memory

| Feature | Value |
|---|---|
| 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

| Feature | Value |
|---|---|
| PCI Express x1 (Gen 3.x) slots | 2 |
| PCI Express x16 (Gen 4.x) slots | 1 |

### Graphics

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

### Network

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

### Internal I/O

| Feature | Value |
|---|---|
| USB 2.0 connectors | 2 |
| CPU fan connector | Yes |
| ATX Power connector (24-pin) | Yes |
| Number of chassis fan connectors | 2 |
| 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 |

### Rear panel I/O ports

| Feature | Value |
|---|---|
| PS/2 ports quantity | 1 |
| 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 2 (3.1 Gen 2) Type-A ports quantity | 2 |

### Storage controllers

| Feature | Value |
|---|---|
| Supported storage drive interfaces | M.2, SATA III |

### BIOS

| Feature | Value |
|---|---|
| BIOS memory size | 256 Mbit |
| BIOS type | UEFI AMI |
| Clear CMOS jumper | Yes |

### Weight & dimensions

| Feature | Value |
|---|---|
| Width | 244 mm |
| Depth | 244 mm |

### Other features

| Feature | Value |
|---|---|
| Weight | 0.845 kg |
| Height | 51 mm |
| Audio chip | Realtek ALC887 |

### Logistics data

| Feature | Value |
|---|---|
| Harmonized System (HS) code | 84733020 |

## 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. 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 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.

## Image

https://aio.lv/img/cache/product/3614649/65417772_large.webp