# Motherboard ASUS PRIME B840M-A-CSM AMD B840 Socket AM5 micro ATX

**URL:** https://aio.lv/en/product--asus-90mb1j10-m0eayc--11227453
**Data updated:** 2025-12-13 10:48 (EET)
**Category:** Motherboards
**Manufacturer:** Asus
**Manufacturer code:** 90MB1J10-M0EAYC
**EAN:** 4711387797204
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 124.49 €
**Prices and availability valid until:** 2026-07-22 23:59
**Price without VAT (21%):** 102.88 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--asus-90mb1j10-m0eayc--11227453

## 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

The ASUS PRIME B840M-A-CSM is a micro ATX motherboard featuring the AMD B840 chipset and Socket AM5. It supports AMD Ryzen 7000, 8000, and 9000 series processors, with a maximum internal memory of 192 GB using DDR5-SDRAM. The board includes multiple DIMM slots and supports M.2 and SATA III storage interfaces for HDD and SSD drives, with RAID levels 0, 1, 5, and 10. It offers a maximum resolution of 7680 x 4320 pixels and features a 2.5 Gigabit Ethernet interface for fast networking.

## Long description

The PRIME B840M-A-CSM motherboard from ASUS Prime series is engineered to maximize the potential of AMD Ryzen 9000 series processors. It combines robust power delivery, multi-layer PCB cooling, enhanced DDR5 memory support and three M.2 slots to accelerate boot and application load times. Designed for business environments, the board is part of the ASUS Corporate Stable Model (CSM) program and includes ASUS Control Center Express for centralized IT monitoring and management. It is Advanced AI PC-ready and integrates ASUS AI solutions such as AI Advisor for performance guidance.
Advantages
This motherboard delivers stable commercial lifecycle support through the ASUS CSM program, including up to 36 months of product lifecycle support and a 6-month end-of-life notice. It offers extensive IT-management capabilities via ASUS Control Center Express for remote monitoring, automated maintenance and secure endpoint configuration. Performance-focused features include an 8+2+1 digital power design with discrete MOSFETs, enhanced DDR5 tuning (AEMP and EXPO support), three M.2 slots with PCIe 4.0 support, Realtek 2.5 Gb Ethernet and front-panel USB Type-C 5Gbps connectivity. Cooling and fan controls are provided by multiple heatsinks and ASUS Fan Xpert 2+, while customization and ease-of-build features include a pre-mounted I/O shield, BIOS FlashBack and SafeSlot Core+.
Key specifications
Chipset: B840 (ASUS Prime series)
CPU support: AMD Ryzen 9000 series processors
Power design: 8+2+1 phase digital VRM with discrete MOSFETs
Memory: DDR5 support with ASUS Enhanced Memory Profile (AEMP) and AMD EXPO support
M.2 slots: Three M.2 slots (two x PCIe 4.0 up to 64 Gbps, one x PCIe 3.0)
LAN: Realtek 2.5 Gb Ethernet
USB: Front USB Type-C 5Gbps connector and multiple rear USB ports
Cooling: Multiple onboard heatsinks, hybrid fan headers, ASUS Fan Xpert 2+
Management: ASUS Control Center Express included (server-grade IT management)
Extras: Pre-mounted I/O shield, BIOS FlashBack™, SafeSlot Core+, Q-LED Core, Aura Sync and addressable Gen2 RGB headers
How to use
Install the motherboard into a compatible micro‑ATX case, mount the CPU and DDR5 memory modules according to the motherboard manual, and connect storage devices to the appropriate M.2 slots or SATA ports. Attach power connectors from a suitable PSU to the 24-pin ATX and CPU power headers, connect front-panel USB Type-C if available, and install the GPU into the reinforced PCIe slot if required. Use the UEFI BIOS for initial configuration, enable or tune memory profiles (AEMP or EXPO) as needed, configure fan curves with ASUS Fan Xpert 2+ or via UEFI, and update drivers using ASUS DriverHub. For IT deployments, enroll devices in ASUS Control Center Express to enable remote monitoring, automated BIOS and software updates, and endpoint grouping rules.
Recommendations
For stable enterprise deployments, register the board with the ASUS CSM program and use ASUS Control Center Express to schedule off‑peak BIOS and utility updates. When building high-performance systems, pair the PRIME B840M-A-CSM with quality DDR5 kits (preferably with EXPO profiles for overclocking), an efficient CPU cooler compatible with provided headers, and a PSU that supports the board’s power requirements.

## Specifications

### Features

| Feature | Value |
|---|---|
| Motherboard form factor | Micro ATX |
| Motherboard chipset | AMD B840 |
| Component for | PC |
| Audio output channels | 7.1 |
| Windows operating systems supported | Windows 11, Windows 10 x64 |
| Motherboard chipset family | AMD |
| Power source type | ATX |

| Feature | Value |
|---|---|
| Product colour | Grey |

### Processor

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

### Memory

| Feature | Value |
|---|---|
| Number of memory slots | 4 |
| Maximum internal memory | 192 GB |
| Supported memory types | DDR5-SDRAM |
| Memory channels | Dual-channel |
| Unbuffered memory | Yes |
| Memory slots type | DIMM |
| Supported memory clock speed (max) | 7600 MHz |
| ECC сompatibility | ECC & non-ECC |

### Expansion slots

| Feature | Value |
|---|---|
| PCI Express x16 (Gen 3.x) slots | 2 |
| Number of M.2 (M) slots | 3 |
| PCI Express x16 (Gen 4.x) slots | 1 |
| 1st M.2 largest key size | 2280 |
| 2nd M.2 largest key size | 2280 |
| 3rd M.2 largest key size | 2280 |
| 1st M.2 highest PCI Express generation | 4.0 |
| 2nd M.2 highest PCI Express generation | 4.0 |
| 3rd M.2 highest PCI Express generation | 3.0 |

### Graphics

| Feature | Value |
|---|---|
| Maximum resolution | 7680 x 4320 |
| 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 |
| Number of chassis fan connectors | 2 |
| Front panel audio connector | Yes |
| TPM 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 |
| Front panel connector | Yes |
| RGB LED pin header | Yes |
| Number of RGB LED pin headers | 3 |
| 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 | 4 |
| Ethernet LAN (RJ-45) ports | 1 |
| Headphone outputs | 1 |
| HDMI ports quantity | 1 |
| HDMI version | 2.1 |
| DisplayPorts quantity | 1 |
| USB 3.2 Gen 1 (3.1 Gen 1) Type-C ports quantity | 1 |
| USB 3.2 Gen 2 (3.1 Gen 2) Type-A ports quantity | 2 |

### Storage controllers

| Feature | Value |
|---|---|
| RAID levels | 1, 5, 10 |
| Supported storage drive types | HDD & SSD |
| RAID support | Yes |
| Number of storage drives supported | 7 |
| 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 |
| Supported processor sockets | Socket AM5 |
| Weight | 0.91 kg |
| Package weight | 1450 g |
| Quick installation guide | Yes |
| DisplayPort version | 1.4 |

### Packaging content

| Feature | Value |
|---|---|
| Cables included | SATA |
| Screws included | Yes |

### Packaging data

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

## FAQ

### How much does the Motherboard ASUS PRIME B840M-A-CSM, 90MB1J10-M0EAYC cost, and is it available for purchase?

The price is 124.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 274 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 Motherboard ASUS PRIME B840M-A-CSM, 90MB1J10-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, pci express x16 (gen 3.x) slots, 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 B840M-A-CSM, 90MB1J10-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/11227453/65437067_large.webp