# Motherboard BIOSTAR B450MX-S micro ATX, AMD B450, Socket AM4, 4x DIMM, DDR4, 128 GB, M.2, SATA III, Gigabit LAN

**URL:** https://aio.lv/en/product--biostar-b450mx-s--10513009
**Data updated:** 2026-03-07 15:21 (EET)
**Category:** Motherboards
**Manufacturer:** BIOSTAR
**Manufacturer code:** B450MX-S
**EAN:** 4712960686878
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 103.49 €
**Prices and availability valid until:** 2026-07-23 23:59
**Price without VAT (21%):** 85.53 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--biostar-b450mx-s--10513009

## 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

BIOSTAR B450MX-S is a micro ATX motherboard for Socket AM4 CPUs (AMD Athlon, Ryzen 2000/3000 series). It features the AMD B450 chipset, four DDR4 DIMM slots supporting up to 128 GB RAM, one PCIe x16 (Gen3) slot, M.2 and SATA III storage support, RAID 0/1/10 and Realtek RTL8111H Gigabit Ethernet for PC builds and upgrades.

## Long description

BIOSTAR B450MX-S is a micro ATX motherboard for Socket AM4 processors, compatible with AMD Athlon and Ryzen 2000/3000 series. Built on the AMD B450 chipset, the board supports up to 128 GB of DDR4 memory across four DIMM slots, a single PCIe x16 (Gen3) slot for graphics expansion, M.2 and SATA III storage interfaces, and an integrated Gigabit Ethernet controller. The board includes integrated HDMI with HDCP support, high-definition audio features and a range of platform-level protections and utilities for system stability and maintenance.
Advantages
The AMD B450 chipset provides broad platform control and PCIe bandwidth for discrete graphics while supporting overclocking and power management features. Hi‑Fi Ground and HD Audio design reduce noise and help preserve audio fidelity. PCIe M.2 and SATAIII 6Gbps provide modern storage performance and compatibility. Additional features such as digital PWM, Super Durable solid capacitors and moisture‑proof PCB construction improve reliability and component lifespan. UEFI BIOS and BIO‑Flasher simplify firmware management for upgrades and system configuration.
Suitable for
 Compact desktop builds and small form factor PCs using micro ATX cases
 Home and office systems requiring Gigabit LAN and HDMI output
 Budget to mid-range gaming or multimedia systems with a single discrete GPU
 Upgrading older Socket AM4 systems to support DDR4 memory and M.2 SSDs
Key specifications
 Form factor: Micro ATX
 Chipset: AMD B450
 CPU socket: Socket AM4 (supports AMD Athlon and Ryzen 2000/3000 series)
 Memory: 4x DDR4 DIMM slots, up to 128 GB total
 Expansion: 1x PCIe x16 (PCIe Gen3)
 Storage interfaces: M.2 (PCIe M.2 32Gb/s) and SATA III (6 Gbps)
 Network: Integrated Gigabit Ethernet (Realtek RTL8111H)
 Video output: HDMI with HDCP and 4K2K support
 USB: USB 3.2 Gen1 Type-A support
 Audio: HD Audio with Hi‑Fi Ground (isolation on PCB for improved clarity)
 Power & durability: Digital PWM, Super Durable solid capacitors, OC/OV/OH protection, moisture‑proof PCB
How to use
Install the motherboard into a compatible micro ATX case, secure it using standoffs and screws, and connect the ATX power supply according to the motherboard manual. Populate DDR4 DIMMs into the recommended slots for dual‑channel operation and install the CPU into the Socket AM4 socket following the CPU and cooler manufacturer instructions. Attach storage devices to M.2 and SATA ports as required and install a graphics card into the PCIe x16 slot if needed. After completing hardware connections, boot to UEFI BIOS to configure memory settings, storage mode (AHCI/RAID), fan profiles with A.I FAN, and update firmware using BIO‑Flasher if a newer BIOS is available.
Usage recommendations
For stable performance, use matched DDR4 memory modules in the recommended slot configuration and keep the BIOS up to date via BIO‑Flasher. Configure A.I FAN profiles to balance cooling and noise, and employ the board’s protection features (OC/OV/OH) by using recommended power supplies and avoiding extreme voltage adjustments. When using M.2 NVMe drives, ensure proper thermal clearance and check motherboard manual for shared lanes or SATA/M.2 port multiplexing to avoid reduced port availability.

## Specifications

### Features

| Feature | Value |
|---|---|
| Motherboard form factor | Micro ATX |
| Motherboard chipset | AMD B450 |
| Component for | PC |
| Audio output channels | 7.1 |
| Motherboard chipset family | AMD |

### Processor

| Feature | Value |
|---|---|
| Processor manufacturer | AMD |
| Compatible processor series | AMD Athlon |
| 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 | 1866, 4333, 4266, 4200, 4133, 4066, 4000, 3600, 3200, 2933, 2667, 2400, 2133 |
| Memory channels | Dual-channel |
| Memory slots type | DIMM |

### Expansion slots

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

### Graphics

| Feature | Value |
|---|---|
| DirectX version | 12.0 |
| HDCP | Yes |

### Network

| Feature | Value |
|---|---|
| Ethernet LAN | Yes |
| LAN controller | Realtek RTL8111H |
| Wi-Fi | Yes |
| Ethernet interface type | Gigabit Ethernet |

### Internal I/O

| Feature | Value |
|---|---|
| USB 2.0 connectors | 2 |
| S/PDIF out connector | Yes |
| CPU fan connector | Yes |
| Number of COM connectors | 1 |
| ATX Power connector (24-pin) | Yes |
| 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 |
| Front panel connector | Yes |

### Rear panel I/O ports

| Feature | Value |
|---|---|
| PS/2 ports quantity | 1 |
| USB 2.0 ports quantity | 2 |
| Ethernet LAN (RJ-45) ports | 1 |
| HDMI ports quantity | 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 |
| RAID support | Yes |
| Supported storage drive interfaces | M.2, SATA III |

### BIOS

| Feature | Value |
|---|---|
| BIOS type | UEFI AMI |
| Clear CMOS jumper | Yes |

### Weight & dimensions

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

### Other features

| Feature | Value |
|---|---|
| Audio chip | Realtek ALC887 |

## FAQ

### How much does the BIOSTAR B450MX-S micro ATX motherboard cost, and is it available for purchase?

The price is 103.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 10 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 BIOSTAR B450MX-S micro ATX motherboard 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 BIOSTAR 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 BIOSTAR 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 x16 (gen 3.x) slots, 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 BIOSTAR B450MX-S micro ATX motherboard?

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/10513009/62703728_large.webp