# Motherboard ASUS PRIME B860M-A-CSM — Intel B860, LGA 1851, micro ATX, DDR5, 4 DIMM, 256 GB, 2.5 Gb Ethernet, 4x SATA III, M.2, 1x PCIe x16

**URL:** https://aio.lv/en/product--asus-90mb1k00-m0eayc--11241145
**Data updated:** 2026-01-21 11:08 (EET)
**Category:** Motherboards
**Manufacturer:** Asus
**Manufacturer code:** 90MB1K00-M0EAYC
**EAN:** 4711387819869
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 159.99 €
**Prices and availability valid until:** 2026-07-21 23:59
**Price without VAT (21%):** 132.22 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--asus-90mb1k00-m0eayc--11241145

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 09.07.2026 | free |
| Pickup points | 14.07.2026 | 1.89 EUR |
| Courier delivery to door | 14.07.2026 | 4.99 EUR |

## Summary description

ASUS PRIME B860M-A-CSM is a micro ATX motherboard with Intel B860 chipset supporting LGA 1851 (Socket V1) processors including Intel Core Ultra (Series 2). It features four DDR5 DIMM slots (up to 256 GB, dual-channel, up to 8666 MHz), 2.5 Gb Ethernet, 4×SATA III, M.2 storage, one PCIe x16 (Gen4) and one PCIe x1 slot. Rear I/O includes HDMI, 2 DisplayPorts, multiple USB ports (including USB 3.2 Gen2 and Type-C 3.2 Gen2x2), 7.1 audio with S/PDIF, TPM and UEFI BIOS. Designed for business and productivity PC builds with RAID support and multiple fan, power and chassis connectors.

## Long description

The ASUS PRIME B860M-A-CSM is a micro ATX motherboard built around the Intel B860 chipset and LGA 1851 socket, designed to support Intel Core Ultra processors (Series 2). It offers four DDR5 DIMM slots supporting up to 256 GB of memory, multiple storage interfaces including M.2 and SATA III, RAID support for levels 0, 1, 5 and 10, and a 2.5 Gigabit Ethernet port for high-speed networking. The board features a robust power design and integrated cooling provisions to maintain stable operation under load, and provides firmware and software tools for system tuning and management.
Advantages
The PRIME B860M-A-CSM combines compact micro ATX sizing with a modern LGA 1851 socket and Intel B860 chipset, enabling use of the latest Intel Core Ultra processors (Series 2). Support for DDR5 memory up to 256 GB and multiple storage options (M.2 and SATA III) allows flexible system configurations. Built-in RAID support and a 2.5 GbE interface meet needs for fast storage arrays and network throughput, while onboard power delivery and cooling features improve stability for sustained workloads. Firmware and software utilities simplify tuning and system management for both end users and IT administrators.
Suitable for
Compact desktop builds using Intel Core Ultra processors (Series 2)
Office and business PCs requiring stable networking and manageability
Home or small-office systems needing multiple storage devices and RAID
General-purpose PCs where DDR5 performance and upgradeability are desired
Key specifications
Form factor: Micro ATX
Chipset: Intel B860
Processor socket: LGA 1851 (Socket V1) for Intel Core Ultra Series 2
Memory: 4 × DDR5 DIMM slots, up to 256 GB
Storage interfaces: M.2 and SATA III; RAID 0, 1, 5, 10 supported
Networking: 2.5 Gigabit Ethernet
Weight: 0.815 kg
How to use
Install the motherboard into a compatible micro ATX case, fit a supported Intel Core Ultra processor into the LGA 1851 socket, and populate DDR5 DIMM modules across the four memory slots according to the motherboard manual to enable dual- or multi-channel operation. Connect M.2 SSDs or SATA drives as required and configure RAID levels in the firmware if using multiple drives. Attach the power supply, cooling solution, and peripherals, then use the BIOS/UEFI and bundled ASUS software for system tuning, firmware updates, and network configuration.
Usage recommendations
For best stability, use matching DDR5 memory modules from the motherboard’s qualified vendor list, ensure adequate case ventilation for sustained workloads, and keep BIOS/firmware up to date. When deploying in business environments, leverage the CSM management features and stable networking to integrate the board into existing IT infrastructure.

## Specifications

### Features

| Feature | Value |
|---|---|
| Motherboard form factor | Micro ATX |
| Motherboard chipset | Intel B860 |
| Component for | PC |
| Audio output channels | 7.1 |
| Windows operating systems supported | Windows 11, Windows 10 x64 |
| Motherboard chipset family | Intel |

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

### Processor

| Feature | Value |
|---|---|
| Processor manufacturer | Intel |
| Processor socket | LGA 1851 (Socket V1) |

### 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 |
| Supported memory clock speed (max) | 8666 MHz |
| ECC сompatibility | non-ECC |

### Expansion slots

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

### 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 | 1 |
| 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 | 3 |
| Front panel audio connector | Yes |
| TPM 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 |
| Thunderbolt headers | 1 |
| USB 3.2 Gen 2 (3.1 Gen 2) connectors | 1 |
| 12V power connector | Yes |
| Number of CPU fan connectors | 1 |

### Rear panel I/O ports

| Feature | Value |
|---|---|
| Line-in | Yes |
| USB 2.0 ports quantity | 4 |
| Ethernet LAN (RJ-45) ports | 1 |
| Microphone in | Yes |
| HDMI ports quantity | 1 |
| DisplayPorts quantity | 2 |
| 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 | 1 |
| USB 3.2 Gen 2x2 Type-C ports quantity | 1 |

### Storage controllers

| Feature | Value |
|---|---|
| RAID levels | 1, 5, 10 |
| Supported storage drive types | HDD & SSD |
| RAID support | Yes |
| Number of storage drives supported | 6 |
| Supported storage drive interfaces | M.2, SATA III |

### BIOS

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

### Weight & dimensions

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

### Other features

| Feature | Value |
|---|---|
| Number of HDDs supported | 4 |
| Weight | 0.815 kg |
| Package weight | 1360 g |
| Height | 50 mm |

### Packaging data

| Feature | Value |
|---|---|
| Package depth | 275 mm |
| Package height | 67.5 mm |
| Package width | 275 mm |

## FAQ

### How much does the ASUS PRIME B860M-A-CSM micro ATX motherboard cost, and is it available for purchase?

The price is 159.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 224 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 09.07.2026 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 ASUS PRIME B860M-A-CSM 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 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 ASUS PRIME B860M-A-CSM 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

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