# Motherboard ASUS PRIME B850-PLUS-CSM AMD B850 Socket AM5 ATX

**URL:** https://aio.lv/en/product--asus-90mb1lc0-m0eayc--11417371
**Data updated:** 2025-12-30 21:17 (EET)
**Category:** Motherboards
**Manufacturer:** Asus
**Manufacturer code:** 90MB1LC0-M0EAYC
**EAN:** 4711387982037
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 191.99 €
**Prices and availability valid until:** 2026-08-01 23:59
**Price without VAT (21%):** 158.67 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--asus-90mb1lc0-m0eayc--11417371

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 16.07.2026 | free |
| Pickup points | 21.07.2026 | 1.89 EUR |
| Courier delivery to door | 21.07.2026 | 4.99 EUR |

## Summary description

The ASUS PRIME B850-PLUS-CSM motherboard features the AMD B850 chipset and Socket AM5, supporting AMD Ryzen 7000, 8000, and 9000 series processors. It supports DDR5 memory up to 256 GB with DIMM slots, and offers M.2 and SATA III interfaces for HDD and SSD storage. With RAID support (0, 1, 5, 10), USB Type-A and Type-C connectors, and 2.5 Gigabit Ethernet, this ATX motherboard is designed for high performance and versatility.

## Long description

The ASUS PRIME B850-PLUS-CSM is an ATX motherboard based on the AMD B850 chipset with Socket AM5, engineered to support AMD Ryzen 7000, 8000 and 9000 series processors. It accommodates up to 256 GB of DDR5 memory across four DIMM slots and provides multiple storage options including M.2 and SATA III with RAID 0/1/5/10 support. The board includes USB Type-A and Type-C ports, 2.5 Gigabit Ethernet connectivity and a feature set aimed at delivering balanced performance and expandability for workstation and commercial builds, including readiness for Advanced AI PC workloads.
Advantages
The PRIME B850-PLUS-CSM combines modern connectivity and storage flexibility with an AM5 platform: DDR5 memory support for higher bandwidth, M.2 and SATA III interfaces for NVMe and SATA drives, and RAID capability for data protection or performance. Integrated 2.5 GbE networking and a mix of USB Type-A and Type-C ports provide versatile I/O for peripherals and high-speed networking. Firmware and software tools included with the ASUS Prime series enable accessible system tuning and management for both builders and IT administrators.
Suitable for
Desktop workstation builds requiring AM5 compatibility and DDR5 memory
Small business or commercial systems that need reliable networking and manageability
PC DIY enthusiasts upgrading to Ryzen 7000/8000/9000 series CPUs
Systems that use NVMe and SATA storage with RAID configurations
Key specifications
Form factor: ATX
Chipset: AMD B850
CPU socket: Socket AM5 (supports AMD Ryzen 7000/8000/9000 series)
Memory: 4 x DIMM DDR5, up to 256 GB
Storage interfaces: M.2 and SATA III; RAID 0, 1, 5, 10 supported
Networking: 2.5 Gigabit Ethernet
I/O: USB Type-A and USB Type-C ports
How to use
Install the ASUS PRIME B850-PLUS-CSM into a compatible ATX chassis, seat an AM5-compatible Ryzen processor into the Socket AM5, and populate DDR5 DIMMs across the DIMM slots following the motherboard manual for optimal channel configuration. Connect storage devices to M.2 sockets or SATA III ports and configure RAID arrays in the BIOS if required. Attach power connectors from a suitable PSU, connect front-panel and peripheral cables, then enter the UEFI/BIOS to set boot order, memory profiles and enable any firmware features needed for system management or AI-related workloads.
Usage recommendations
For stable operation, use DDR5 modules listed on the ASUS support memory QVL, install the latest BIOS before deploying in production, and pair the board with a quality power supply that meets the processor TDP and system component requirements.

## Specifications

### Features

| Feature | Value |
|---|---|
| Motherboard form factor | ATX |
| Motherboard chipset | AMD B850 |
| Component for | PC |
| Audio output channels | 7.1 |
| Cooling type | Passive |
| Windows operating systems supported | Windows 11, Windows 10 x64 |
| Motherboard chipset family | AMD |

| Feature | Value |
|---|---|
| Product colour | Multicolour |

### Processor

| Feature | Value |
|---|---|
| Processor manufacturer | AMD |
| Processor socket | Socket AM5 |

### Memory

| Feature | Value |
|---|---|
| Number of memory slots | 4 |
| Maximum internal memory | 256 GB |
| Supported memory types | DDR5-SDRAM |
| Memory channels | Dual-channel |
| Unbuffered memory | Yes |
| Memory slots type | DIMM |
| ECC сompatibility | ECC & non-ECC |

### Expansion slots

| Feature | Value |
|---|---|
| Number of M.2 (M) slots | 3 |
| PCI Express x16 (Gen 4.x) slots | 1 |
| 1st M.2 largest key size | 22110 |
| 1st M.2 highest PCI Express generation | 5.0 |

### Graphics

| Feature | Value |
|---|---|
| Parallel processing technology support | Not supported |

### Network

| Feature | Value |
|---|---|
| Ethernet LAN | Yes |
| Wi-Fi | No |
| Ethernet interface type | 2.5 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 |
| Chassis intrusion connector | Yes |
| Number of chassis fan connectors | 4 |
| Front panel audio connector | Yes |
| EPS power connector (8-pin) | Yes |
| USB 3.2 Gen 1 (3.1 Gen 1) connectors | 2 |
| Number of SATA III connectors | 4 |
| Thunderbolt headers | 1 |
| 12V power connector | Yes |
| RGB LED pin header | Yes |
| Number of RGB LED pin headers | 3 |
| Number of CPU fan connectors | 1 |
| Number of water pump connectors | 1 |

### Rear panel I/O ports

| Feature | Value |
|---|---|
| Line-in | Yes |
| USB connector type | USB Type-A, USB Type-C |
| USB 2.0 ports quantity | 2 |
| Ethernet LAN (RJ-45) ports | 1 |
| Microphone in | Yes |
| HDMI ports quantity | 1 |
| DisplayPorts quantity | 1 |
| USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity | 2 |
| USB 3.2 Gen 2 (3.1 Gen 2) Type-A ports quantity | 3 |
| USB 3.2 Gen 2 (3.1 Gen 2) Type-C ports quantity | 1 |

### Storage controllers

| Feature | Value |
|---|---|
| RAID levels | 5, 10, 1 |
| Supported storage drive types | HDD & SSD |
| RAID support | Yes |
| Number of storage drives supported | 7 |
| Supported storage drive interfaces | SATA III, M.2 |

### BIOS

| Feature | Value |
|---|---|
| BIOS memory size | 256 Mbit |
| BIOS type | UEFI AMI |

### Weight & dimensions

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

### Other features

| Feature | Value |
|---|---|
| Number of HDDs supported | 4 |
| Weight | 1.03 kg |
| Package weight | 1240 g |
| Height | 48 mm |

### Packaging data

| Feature | Value |
|---|---|
| Package depth | 273 mm |
| Package height | 68 mm |
| Package width | 353 mm |

## FAQ

### How much does the Motherboard ASUS PRIME B850-PLUS-CSM, 90MB1LC0-M0EAYC cost, and is it available for purchase?

The price is 191.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 102 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 16.07.2026 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 B850-PLUS-CSM, 90MB1LC0-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, 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 B850-PLUS-CSM, 90MB1LC0-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/11417371/66183957_large.webp