# Motherboard ASRock B860M Pro-A micro ATX — Intel B860, LGA 1851, DDR5, 4 DIMM, up to 256 GB, 2.5Gb Ethernet

**URL:** https://aio.lv/en/product--asrock-90-mxbrr0-a0uayz--11368400
**Data updated:** 2026-01-21 11:09 (EET)
**Category:** Motherboards
**Manufacturer:** ASROCK
**Manufacturer code:** 90-MXBRR0-A0UAYZ
**EAN:** 4711581490291
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 122.99 €
**Prices and availability valid until:** 2026-08-07 23:59
**Price without VAT (21%):** 101.64 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--asrock-90-mxbrr0-a0uayz--11368400

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 22.07.2026 | free |
| Pickup points | 27.07.2026 | 1.89 EUR |
| Courier delivery to door | 27.07.2026 | 4.99 EUR |

## Summary description

ASRock B860M Pro-A is a micro ATX motherboard with Intel B860 chipset and LGA 1851 socket, supporting Intel processors and DDR5 memory across four DIMM slots (up to 256 GB, dual-channel). It offers 2.5Gb Ethernet (Dragon RTL8125BG), three M.2 slots (one 2280), four SATA III ports, PCIe Gen4/Gen5 x16 slots, HDMI 2.1 and DisplayPort, USB-C, RAID support and UEFI AMI BIOS. Ideal for compact desktop builds, gaming or productivity PCs; contact a qualified technician for installation issues.

## Long description

ASRock B860M Pro-A is a micro ATX motherboard for Intel LGA 1851 (Socket V1) processors, designed to support Intel Core Ultra (Series 2). It offers four DDR5 DIMM slots with up to 256 GB memory capacity, multiple M.2 and SATA III storage options, PCIe 5.0 support for the primary M.2 slot, integrated 2.5 Gb/s LAN, modern USB Type-C connectivity and onboard RGB headers. The board targets compact desktop builds needing contemporary connectivity, solid power delivery and DDR5 memory overclocking support.
Advantages
The motherboard features a 10+1+1 power phase design with Dr.MOS and a hi-density CPU power connector to improve stability under high loads and overclocking. A 6-layer PCB and aluminum heatsinks enhance thermal performance and energy efficiency. PCIe Gen5 Blazing M.2 and USB 3.2 Gen2x2 Type-C provide high-speed storage and peripheral transfers, while dual graphics outputs (HDMI + DisplayPort) and reinforced PCIe steel slot increase versatility and mechanical durability.
Suitable for
Compact desktop builds and micro ATX systems
Home office and content creation with high network throughput
Gaming systems utilizing DDR5 memory and discrete GPUs
Users upgrading to PCIe Gen5 SSDs and USB Type-C peripherals
Key specifications
Socket: LGA 1851 (Socket V1) for Intel Core Ultra (Series 2)
Chipset: Intel B860
Form factor: Micro ATX
Memory: 4 × DDR5 DIMM, dual channel, up to 256 GB, supports XMP/EXPO and OC profiles
Power design: 10+1+1 power phase with Dr.MOS and hi-density CPU power connector
PCIe/expansion: 1 × PCIe 5.0 x16, 1 × PCIe 4.0 x4, 1 × M.2 Key E for Wi-Fi
Storage: 1 Blazing M.2 (PCIe Gen5 x4), 2 Hyper M.2 (PCIe Gen4 x4), 4 × SATA3
USB: 1 × USB 3.2 Gen2x2 Type-C (rear, 20 Gbps), 1 × USB 3.2 Gen1 Type-C (front), 5 × USB 3.2 Gen1, 6 × USB 2.0
LAN: Realtek 2.5 Gb/s (Dragon RTL8125BG)
Audio: Realtek ALC897 7.1 CH HD Audio Codec
BIOS: UEFI AMI (256 Mbit) with BIOS Flashback support
How to use
Install the motherboard into a compatible Micro ATX case, fit an LGA 1851 processor and DDR5 memory modules into the four DIMM slots, and connect storage devices to the M.2 slots or SATA ports. Attach power using the hi-density CPU power connector and main ATX power connector. Connect display via HDMI or DisplayPort on the rear I/O, and plug USB Type-C/USB devices as required. Use the BIOS to enable XMP/EXPO profiles for DDR5 memory overclocking and update BIOS via BIOS Flashback if necessary.
Usage recommendations
For stable overclocking and heavy workloads, use high-quality power supplies and memory modules verified for Intel XMP or AMD EXPO. Ensure proper case airflow around the aluminum heatsinks and keep BIOS and network drivers up to date using the Auto Driver Installer.

## 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 x64 |
| Motherboard chipset family | Intel |

| Feature | Value |
|---|---|
| Product colour | Black |

### 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 |
|---|---|
| Number of M.2 (M) slots | 1 |
| PCI Express x4 (Gen 4.x) slots | 1 |
| PCI Express x16 (Gen 5.x) slots | 1 |

### Graphics

| Feature | Value |
|---|---|
| HDCP | Yes |

### Network

| Feature | Value |
|---|---|
| Ethernet LAN | Yes |
| LAN controller | Dragon RTL8125BG |
| Wi-Fi | No |
| Ethernet interface type | 2.5 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 | 3 |
| Front panel audio connector | Yes |
| TPM connector | Yes |
| USB 3.2 Gen 1 (3.1 Gen 1) connectors | 2 |
| Number of SATA III connectors | 4 |
| RGB LED pin header | Yes |
| Number of CPU fan connectors | 2 |
| Number of EPS power connectors (8-pin) | 1 |

### Rear panel I/O ports

| Feature | Value |
|---|---|
| Line-in | Yes |
| 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 | 3 |
| USB 3.2 Gen 2x2 Type-C ports quantity | 1 |

### Storage controllers

| Feature | Value |
|---|---|
| RAID levels | 10, 5, 1 |
| Supported storage drive types | HDD & SSD |
| RAID support | Yes |
| 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 | 244 mm |
| Depth | 244 mm |

### Other features

| Feature | Value |
|---|---|
| DisplayPort version | 1.4 |
| Audio chip | Realtek ALC897 |

### Packaging content

| Feature | Value |
|---|---|
| Cables included | SATA |

## FAQ

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

The price is 122.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 99 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 22.07.2026 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 ASRock B860M Pro-A 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 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, 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.

## Image

https://aio.lv/img/cache/product/11368400/66962673_large.webp