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header-product Motherboard ASUS PRIME B850M-A-CSM AMD B850 Socket AM5 micro ATX DDR5
195.99 €

Motherboard ASUS PRIME B850M-A-CSM AMD B850 Socket AM5 micro ATX DDR5

Motherboard ASUS PRIME B850M-A-CSM Photo 1
Motherboard ASUS PRIME B850M-A-CSM Photo 2
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Motherboard ASUS PRIME B850M-A-CSM Photo 4
Motherboard ASUS PRIME B850M-A-CSM Photo 5
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Motherboard ASUS PRIME B850M-A-CSM Photo 7
Motherboard ASUS PRIME B850M-A-CSM Photo 1
Motherboard ASUS PRIME B850M-A-CSM Photo 2
Motherboard ASUS PRIME B850M-A-CSM Photo 3
Motherboard ASUS PRIME B850M-A-CSM Photo 4
Motherboard ASUS PRIME B850M-A-CSM Photo 5
Motherboard ASUS PRIME B850M-A-CSM Photo 6
Motherboard ASUS PRIME B850M-A-CSM Photo 7
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Motherboard ASUS PRIME B850M-A-CSM AMD B850 Socket AM5 micro ATX DDR5

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Motherboard ASUS PRIME B850M-A-CSM AMD B850 Socket AM5 micro ATX DDR5

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Short description

The ASUS PRIME B850M-A-CSM is a micro ATX motherboard designed for AMD processors, supporting Ryzen 7000, 8000, and 9000 series. It features DDR5 memory support with a maximum capacity of 256 GB, multiple PCIe interfaces for storage, and advanced RAID configurations. Ideal for high-resolution displays up to 7680 x 4320 pixels and equipped with 2.5 Gigabit Ethernet for fast connectivity.
Available at price 195.99 €: 51 pcs.
Total available for order: 81 pcs.
Warranty: 2 Years
SKU: 11456553
free shipment

Cheapest delivery:

Venipak Pickup LV, Venipak Locker LV

Pick-up points

Venipak Pickup LV

Venipak Locker LV

Cost

1.89 €

Deliver

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Customer service center
2b. Kengaraga str., Riga, Latvia, LV-1063
20.07.2026 {{selectedOffer.officeDeliveryString}}
free
Courier Delivery Please note that in case of a large parcel additional delivery costs may apply!
23.07.2026 {{selectedOffer.courierDeliveryString}}
From 4.99 € (Weight: 1.28 kg)
Parcel couriers
Venipak Pickup LV / Venipak Locker LV / Latvijas Pasts pakomāts / Unisend LV / DPD Paku skapis / Omniva LV / Latvijas Pasts nodaļa
23.07.2026 {{selectedOffer.parcelStationDeliveryString}}
From 1.89 €
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All payment Methods:
Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment
36 months installment: from 5.44 euros per month
Price for companies: 161.98€ Price is valid only for legal clients
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Product information

Description

The ASUS PRIME B850M-A-CSM is a micro‑ATX motherboard for Socket AM5 systems, engineered for AMD Ryzen™ 7000, 8000 and 9000 series processors. It supports DDR5 memory (up to 256 GB across 4 slots), multiple PCIe interfaces including a PCIe 5.0-capable M.2 slot, and integrated 2.5 Gb Ethernet. Built for corporate and DIY use, the board is part of the ASUS Corporate Stable Model (CSM) program and includes ASUS Control Center Express for centralized IT management.

Advantages

The PRIME B850M-A-CSM combines a robust 8+2+1 digital power design with multi-layer PCB cooling to deliver stable power and improved thermal performance for everyday and demanding workloads. It offers enhanced DDR5 tuning (AEMP and EXPO support), three M.2 slots with up to one PCIe 5.0 lane for faster storage, extensive fan and thermal control via Fan Xpert 2+, and comprehensive connectivity including front-panel USB Type-C and Realtek 2.5 Gb Ethernet. Commercial features include a 36-month product lifecycle support and ASUS Control Center Express for IT deployment and endpoint management.

Suitable for

  • Office and corporate desktops requiring stable lifecycle support and remote IT management
  • Home and small-business workstations for content creation and productivity
  • Enthusiast and DIY builds that need DDR5 performance and PCIe 5.0 storage support
  • Systems requiring multiple NVMe drives and compact micro‑ATX form factor

Key specifications

  • Form factor: Micro ATX
  • Chipset: AMD B850
  • CPU socket: AM5 (supports AMD Ryzen 7000/8000/9000 series)
  • Memory: 4 × DDR5 slots, up to 256 GB
  • M.2: Three M.2 slots (one with PCIe 5.0 up to 128 Gbps, two with PCIe 4.0)
  • LAN: Realtek 2.5 Gb Ethernet
  • Front I/O: USB 5Gbps Type‑C connector
  • Power design: 8+2+1 phase digital VRM (Digi+)
  • Special features: Pre-mounted I/O shield, BIOS FlashBack™, SafeSlot, Q-LED Core

How to use

Install the motherboard into a compatible micro‑ATX chassis and populate the AM5 CPU, DDR5 memory modules (observe recommended slot population), GPU and storage devices according to the manual. Connect power, front-panel headers and cooling fans, then use the UEFI BIOS or ASUS AI Advisor for initial configuration and performance tuning. For BIOS updates without CPU or memory installed, use BIOS FlashBack™: copy the approved BIOS file to a FAT32 USB stick, insert into the FlashBack™ port and press the button.

Usage recommendations

For stable corporate deployments, register and deploy ASUS Control Center Express to automate BIOS and software updates during off‑peak hours, and group endpoints for secure configuration management. Use recommended DDR5 modules with EXPO or allow AEMP to optimize non‑EXPO kits for reliable system performance.

Specifications

Motherboard form factor:
Micro ATX
Motherboard chipset:
AMD B850
Component for:
PC
Processor socket:
Socket AM5
Number of memory slots:
4
Maximum internal memory:
256 GB
Supported memory types:
DDR5-SDRAM
All features

Features

Motherboard form factor:
Micro 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
Power source type:
ATX
Product colour:
Grey

Processor

Processor manufacturer:
AMD
Processor socket:
Socket AM5

Memory

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):
8000 MHz
Maximum internal memory per slot:
64 GB
ECC сompatibility:
ECC & non-ECC

Expansion slots

Number of M.2 (M) slots:
3
PCI Express x16 (Gen 4.x) slots:
2
PCI Express x16 (Gen 5.x) slots:
1
1st M.2 largest key size:
2280
2nd M.2 largest key size:
2280
3rd M.2 largest key size:
2280
4th M.2 largest key size:
2280
1st M.2 highest PCI Express generation:
5.0
2nd M.2 highest PCI Express generation:
4.0
3rd M.2 highest PCI Express generation:
4.0
4th M.2 highest PCI Express generation:
4.0

Graphics

Maximum resolution:
7680 x 4320
Parallel processing technology support:
Not supported

Network

Ethernet LAN:
Yes
Wi-Fi:
No
Ethernet interface type:
2.5 Gigabit Ethernet

Internal I/O

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:
3
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:
2
Number of SATA III connectors:
4
USB 3.2 Gen 2 (3.1 Gen 2) connectors:
0
Front panel connector:
Yes
12V power connector:
Yes
RGB LED pin header:
Yes
Number of RGB LED pin headers:
3
Number of CPU fan connectors:
1
Number of EPS power connectors (8-pin):
1

Rear panel I/O ports

Line-in:
Yes
USB 2.0 ports quantity:
4
Ethernet LAN (RJ-45) ports:
1
Headphone outputs:
1
Microphone in:
Yes
VGA (D-Sub) ports quantity:
0
DVI-D ports quantity:
0
HDMI ports quantity:
1
HDMI version:
2.1
DisplayPorts quantity:
2
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity:
2
USB 3.2 Gen 1 (3.1 Gen 1) Type-C ports quantity:
0
USB 3.2 Gen 2 (3.1 Gen 2) Type-A ports quantity:
2
USB 3.2 Gen 2 (3.1 Gen 2) Type-C ports quantity:
0

Storage controllers

RAID levels:
1, 5, 10
Supported storage drive types:
HDD & SSD
RAID support:
Yes
Number of storage drives supported:
7
Supported storage drive interfaces:
PCI Express 5.0, PCI Express 4.0

BIOS

BIOS memory size:
256 Mbit
BIOS type:
UEFI AMI

Weight & dimensions

Width:
244 mm
Depth:
244 mm

Other features

Number of HDDs supported:
4
Supported processor sockets:
Socket AM5
Package weight:
1450 g
DisplayPort version:
1.4

Packaging content

Cables included:
SATA
Screws included:
Yes

Packaging data

Package depth:
275 mm
Package height:
67.5 mm
Package width:
275 mm

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Stock data
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Customer reviews

Customer questions

FAQ

How much does the Motherboard ASUS PRIME B850M-A-CSM cost, and is it available for purchase?

The price is 195.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 81 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 20.07.2026 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 B850M-A-CSM be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. We work with leading banks and leasing companies in Latvia, allowing you to make your purchase on convenient terms — with a minimal down payment and a repayment period from 3 to 36 months. You can apply for credit or installments for the Motherboard ASUS PRIME B850M-A-CSM online, and the application process is as simple as possible:
  • Select the product on the website and add it to your cart;
  • When placing your order, choose the payment method “Installments”;
  • Fill in the required details for the lending partner;
  • Receive a decision within a few minutes.
For more information about available payment options, interest-free installment terms, and credit conditions in Latvia, please visit the Payment page.

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. We will assist with consultation, warranty claim processing, and coordination with certified service centers.

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.

Where can I download the instructions for Motherboard ASUS PRIME B850M-A-CSM?

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.
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