# Motherboard Asrock B550 Pro4 AMD B550 Socket AM4 ATX

**URL:** https://aio.lv/en/product--asrock-90-mxbcz0-a0uayz--3502457
**Data updated:** 2026-02-17 11:43 (EET)
**Category:** Motherboards
**Manufacturer:** ASROCK
**Manufacturer code:** 90-MXBCZ0-A0UAYZ
**EAN:** 4710483931482
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 98.99 €
**Prices and availability valid until:** 2026-07-31 23:59
**Price without VAT (21%):** 81.81 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--asrock-90-mxbcz0-a0uayz--3502457

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 15.07.2026 | free |
| Pickup points | 20.07.2026 | 1.89 EUR |
| Courier delivery to door | 20.07.2026 | 4.99 EUR |

## Summary description

The Asrock B550 Pro4 motherboard supports AMD Ryzen 3000 series processors with an AM4 socket. It features DDR4-SDRAM memory support up to 128 GB, DIMM slots, and multiple storage interfaces including M.2 and SATA III for HDD and SSD drives. With RAID levels 0, 1, and 10, it offers flexible storage solutions. The board supports CrossFireX technology for enhanced graphics performance and includes a Gigabit Ethernet interface with a Realtek RTL8111H LAN controller for reliable networking.

## Long description

ASRock B550 motherboard delivers a complete platform for modern PC builds, offering Nahimic audio, dual M.2 support including Type 22110 NVMe, reinforced PCIe 4.0 steel slot, 2oz copper PCB and an 8-power-phase design with premium 50A power chokes. The board includes dual USB 3.2 Gen2 Type-A and Type-C ports, dual graphics outputs (HDMI + D-SUB), M.2 (Key E) for optional Wi‑Fi, Post Status Checker for quick troubleshooting and comprehensive spike protection. Polychrome RGB provides unified lighting control for onboard LEDs and connected RGB devices.
Advantages
The B550 platform ensures stable power delivery and enhanced overclocking through its 8 power phase design, premium 50A chokes and 2oz copper PCB, while dual M.2 sockets support high-speed NVMe storage (including Type 22110) with M.2 armors for thermal stability. Nahimic Audio and the Sound Tracker add directional audio awareness for gaming. Reinforced PCIe 4.0 steel slot improves mechanical and signal reliability for heavy graphics cards. Built-in USB 3.2 Gen2 (Type-A and Type-C) and dual display outputs increase connectivity options.
Key specifications
Chipset: AMD B550 compatible motherboard
Power design: 8 power phases with premium 50A power chokes
PCB: 2oz copper inner layers
M.2: Dual M.2 sockets, one supports PCIe Gen4 x4 (Hyper M.2), supports Type 22110; the other supports PCIe Gen3 x2 / SATA3
M.2 protection: M.2 armors for thermal and physical stability
PCIe: Reinforced steel PCIe slot (PCIe 4.0 ready)
Audio: Nahimic Audio with Sound Tracker
Rear I/O: Dual USB 3.2 Gen2 (Type-A + Type-C)
Wireless option: M.2 (Key E) slot for Wi‑Fi modules (802.11ac optional)
Display outputs: HDMI and D-SUB
Protection: Full Spike Protection technologies
Utilities: Post Status Checker; Live Update & APP Shop
How to use
Install the motherboard into a compatible ATX/micro-ATX case following the manufacturer’s installation guide, connect the CPU, cooler, DDR4 memory modules and power supply cables, then install NVMe or SATA M.2 drives into the dedicated sockets and secure them with the provided M.2 armor if available. Attach GPU into the reinforced PCIe slot and connect displays via HDMI or D-SUB. For Wi‑Fi connectivity, insert an M.2 (Key E) wireless card and attach antennas. Use the Post Status Checker at boot to identify POST issues and run ASRock Live Update & APP Shop to install drivers and firmware updates.
Recommendations
For optimal thermal performance and longevity, use M.2 armors or heatsinks on high-performance NVMe drives, ensure adequate case airflow when overclocking, and keep firmware and drivers updated via Live Update & APP Shop. When installing heavy graphics cards, secure them properly to benefit from the reinforced steel PCIe slot.

## Specifications

### Features

| Feature | Value |
|---|---|
| Motherboard form factor | ATX |
| Motherboard chipset | AMD B550 |
| Component for | PC |
| Audio output channels | 7.1 |
| PC health monitoring | CPU, FAN, Temperature, Voltage, Water cooling |
| Motherboard chipset family | AMD |

### Processor

| Feature | Value |
|---|---|
| Processor manufacturer | AMD |
| Maximum number of SMP processors | 1 |
| 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 | 2133, 2400, 2667, 2933, 3200, 3466, 3600, 3733, 3800, 3866, 4000, 4133, 4200, 4266, 4333, 4400, 4466, 4533 |
| Memory channels | Dual-channel |
| Unbuffered memory | Yes |
| Memory slots type | DIMM |
| Supported memory module capacities | 4GB, 8GB, 16GB, 32GB |
| Supported memory clock speed (max) | 4533 MHz |
| ECC сompatibility | ECC & non-ECC |

### Expansion slots

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

### Graphics

| Feature | Value |
|---|---|
| Parallel processing technology support | CrossFireX, Quad-GPU CrossFireX |
| DirectX version | 12.0 |
| HDCP | Yes |

### Network

| Feature | Value |
|---|---|
| Ethernet LAN | Yes |
| Wake-on-LAN ready | 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 |
| Number of COM connectors | 1 |
| ATX Power connector (24-pin) | Yes |
| Number of chassis fan connectors | 4 |
| Front panel audio connector | Yes |
| TPM connector | Yes |
| Peripheral (Molex) power connectors (4-pin) | 1 |
| EPS power connector (8-pin) | Yes |
| USB 3.2 Gen 1 (3.1 Gen 1) connectors | 1 |
| Number of SATA III connectors | 6 |
| Front panel connector | Yes |
| 12V power connector | Yes |
| RGB LED pin header | Yes |

### Rear panel I/O ports

| Feature | Value |
|---|---|
| PS/2 ports quantity | 1 |
| Ethernet LAN (RJ-45) ports | 1 |
| Microphone in | Yes |
| VGA (D-Sub) 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 | 1 |
| USB 3.2 Gen 2 (3.1 Gen 2) Type-C ports quantity | 1 |

### Storage controllers

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

### BIOS

| Feature | Value |
|---|---|
| BIOS memory size | 256 Mbit |
| BIOS type | UEFI AMI |
| ACPI version | 5.1 |
| System Management BIOS (SMBIOS) version | 2.3 |

### Weight & dimensions

| Feature | Value |
|---|---|
| Width | 305 mm |
| Depth | 244 mm |

### Other features

| Feature | Value |
|---|---|
| Supported processor sockets | Socket AM4 |
| Weight | 0.465 kg |
| Height | 87 mm |
| Audio chip | Realtek ALC1200 |

### Packaging content

| Feature | Value |
|---|---|
| Cables included | SATA |
| Drivers included | Yes |

### Logistics data

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

## FAQ

### How much does the Motherboard Asrock B550 Pro4, 90-MXBCZ0-A0UAYZ cost, and is it available for purchase?

The price is 98.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 263 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 15.07.2026 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 Asrock B550 Pro4, 90-MXBCZ0-A0UAYZ 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 ASROCK 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 ASROCK 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, pci express x16 (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 Asrock B550 Pro4, 90-MXBCZ0-A0UAYZ?

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/3502457/65417149_large.webp