| Processor | |
| Processor manufacturer | AMD |
| Compatible processor series | AMD Ryzen 7000 Series, AMD Ryzen 8000 Series, AMD Ryzen 9000 Series |
| Processor socket | AM5 |
| Supported processor sockets | Socket AM5 |
| Memory | |
| Maximum internal memory | 192 GB |
| ECC | ![]() |
| Non-ECC | ![]() |
| Supported memory types | DDR5 |
| Memory channels | Dual-channel |
| Unbuffered memory | ![]() |
| Memory slots type | DIMM |
| Number of memory slots | 4 |
| Supported memory clock speed (max) | 7600 MHz |
| ECC сompatibility | ECC & Non-ECC |
| Weight & dimensions | |
| Width | 244 mm |
| Depth | 244 mm |
| Networking | |
| Ethernet LAN | ![]() |
| Bluetooth | ![]() |
| Wi-Fi | ![]() |
| Ethernet interface type | 2.5 Gigabit Ethernet |
| Internal I/O | |
| USB 2.0 connectors | 2 |
| S/PDIF out connector | ![]() |
| CPU fan connector | ![]() |
| Number of COM connectors | 1 |
| ATX Power connector (24-pin) | ![]() |
| Number of chassis fan connectors | 2 |
| Front panel audio connector | ![]() |
| TPM connector | ![]() |
| EPS power connector (8-pin) | ![]() |
| 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 | ![]() |
| 12V power connector | ![]() |
| RGB LED pin header | ![]() |
| Number of RGB LED pin headers | 3 |
| Number of CPU fan connectors | 2 |
| Number of EPS power connectors (8-pin) | 1 |
| Back panel I/O ports | |
| Line-in | ![]() |
| USB 2.0 ports quantity | 4 |
| Ethernet LAN (RJ-45) ports | 1 |
| Headphone outputs | 1 |
| VGA (D-Sub) ports quantity | 0 |
| DVI-D ports quantity | 0 |
| HDMI ports quantity | 1 |
| HDMI version | 2.1 |
| DisplayPorts quantity | 1 |
| DisplayPort version | 1.4 |
| USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity | 0 |
| 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 |
| USB 3.2 Gen 2 (3.1 Gen 2) Type-C ports quantity | 0 |
| Storage controllers | |
| RAID levels | 0, 1, 5, 10 |
| Number of HDDs supported | 4 |
| RAID support | ![]() |
| Number of storage drives supported | 7 |
| Supported storage drive types | HDD & SSD |
| Supported storage drive interfaces | M.2, SATA III |
| Packaging data | |
| Package weight | 1.45 kg |
| Package depth | 275 mm |
| Package height | 67.5 mm |
| Package width | 275 mm |
| Packaging content | |
| Cables included | SATA |
| Screws included | ![]() |
| Expansion slots | |
| PCI Express x16 slots | 3 |
| PCI Express x1 slots | 2 |
| PCI Express x1 (Gen 3.x) slots | 2 |
| 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 |
| BIOS | |
| BIOS memory size | 256 Mbit |
| BIOS type | UEFI AMI |
| Clear CMOS button | ![]() |
| Other features | |
| Weight | 910 g |
| Quick installation guide | ![]() |
| Graphics | |
| Maximum resolution | 7680 x 4320 pixels |
| Parallel processing technology support | Not supported |
| Features | |
| Motherboard chipset | AMD B840 |
| Motherboard form factor | Micro ATX |
| Product colour | Grey |
| Audio output channels | 7.1 channels |
| Windows operating systems supported | Windows 10 x64, Windows 11 |
| Power source type | ATX |
| Motherboard chipset family | AMD |
| Component for | PC |
| EAN | 4711387797204 |
| Warranty | 3 years |
The ASUS PRIME B840M-A-CSM is a micro-ATX motherboard built around the AMD B840 chipset for the AM5 socket. It is engineered for compatibility with AMD Ryzen 9000, 8000, and 7000 Series desktop processors, making it a foundation for business or productivity systems. The board integrates the ASUS 5X PROTECTION III hardware safeguards, which are designed to enhance component durability and operational stability. Its power architecture is structured to supply consistent power to multi-core CPUs during sustained workloads.
This motherboard supports up to 256 GB of dual-channel DDR5 memory across four DIMM slots, accommodating both ECC and non-ECC modules. For data storage, it provides three M.2 slots and four SATA 6Gb/s ports, with support for various RAID configurations. Network connectivity is handled by an onboard 2.5Gb Ethernet port. The rear I/O panel includes two DisplayPort 1.4 outputs and one HDMI 2.1 port, offering flexible options for integrated graphics display alongside multiple USB ports for peripherals.
Key Features:- Supports AMD Ryzen 9000, 8000, and 7000 Series processors
- Features the AMD B840 chipset and AM5 socket
- Accommodates up to 256 GB of DDR5 memory
- Provides four DIMM slots in a dual-channel configuration
- Equipped with three M.2 slots and four SATA 6Gb/s ports
- Includes one PCIe 4.0 x16 slot for expansion cards
- Offers integrated 2.5Gb Ethernet for network connectivity
- Built on a compact micro-ATX form factor
- Provides HDMI and dual DisplayPort video outputs
- Utilizes 24-pin ATX and 8-pin EPS power connectors
Estimated delivery: 09.12 - 15.12
Today: Closed
Estimated delivery: 09.12 - 15.12
Today: Closed
Estimated delivery: 09.12 - 15.12
Today: Closed
Estimated delivery: 09.12 - 15.12
Today: Closed
Estimated delivery: 09.12 - 15.12
Today: Closed
Estimated delivery time: 09.12 - 15.12
Estimated delivery time: 10.12 - 15.12
Estimated delivery time: 09.12 - 14.12
Estimated delivery time: 10.12 - 15.12
Estimated delivery time: 10.12 - 14.12
Estimated delivery time: 10.12 - 14.12
- manual pdf (English)


