B840M-A WIFI
ASUS Prime series motherboards are expertly engineered to unleash the full potential of AMD Ryzen™ 9000 series processors. The PRIME B840M-A WIFI motherboard provides users and PC DIY builders with a range of performance optimizations via intuitive software and firmware features. It’s designed to be Advanced AI PC-ready, offering the power and connectivity needed for demanding AI applications.
| Weight & dimensions | |
| Width | 244 mm |
| Depth | 244 mm |
| Memory | |
| Maximum internal memory | 192 GB |
| Supported memory types | DDR5-SDRAM |
| Memory channels | Dual-channel |
| Memory slots type | DIMM |
| Unbuffered memory | Yes |
| Number of memory slots | 4 |
| ECC сompatibility | ECC & Non-ECC |
| Processor | |
| Compatible processor series | AMD Ryzen 7000 Series, AMD Ryzen 8000 Series, AMD Ryzen 9000 Series |
| Processor socket | Socket AM5 |
| Supported processor sockets | Socket AM5 |
| Processor manufacturer | AMD |
| Rear panel I/O ports | |
| USB 2.0 ports quantity | 4 |
| Ethernet LAN (RJ-45) ports | 1 |
| VGA (D-Sub) ports quantity | 0 |
| WiFi-AP antenna jack | 1 |
| DVI-D ports quantity | 0 |
| HDMI ports quantity | 1 |
| DisplayPorts quantity | 2 |
| 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 |
| 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 |
| 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 |
| USB 3.2 Gen 2 (3.1 Gen 2) connectors | 0 |
| Front panel connector | Yes |
| 12V power connector | Yes |
| Network | |
| Ethernet interface type | 2.5 Gigabit Ethernet |
| Bluetooth | Yes |
| Bluetooth version | 5.3 |
| Wi-Fi standards | Wi-Fi 6E (802.11ax) |
| Ethernet LAN | Yes |
| Wi-Fi | Yes |
| Top Wi-Fi standard | Wi-Fi 6E (802.11ax) |
| Expansion slots | |
| 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 |
| 1st M.2 highest PCI Express generation | 4.0 |
| 2nd M.2 largest key size | 2280 |
| 2nd M.2 highest PCI Express generation | 4.0 |
| 3rd M.2 largest key size | 2280 |
| 3rd M.2 highest PCI Express generation | 3.0 |
| Packaging content | |
| Cables included | SATA |
| Antenna included | Yes |
| Screws included | Yes |
| BIOS | |
| BIOS type | UEFI AMI |
| BIOS memory size | 256 Mbit |
| Graphics | |
| Parallel processing technology support | Not supported |
| Features | |
| Motherboard form factor | micro ATX |
| Motherboard chipset | AMD B840 |
| Audio output channels | 7.1 channels |
| Motherboard chipset family | AMD |
| Component for | PC |
| Windows operating systems supported | Windows 10 x64, Windows 11 |
| Storage controllers | |
| RAID levels | 0, 1, 5, 10 |
| Number of HDDs supported | 4 |
| Supported storage drive types | HDD & SSD |
| Supported storage drive interfaces | M.2, SATA III |
| Number of storage drives supported | 7 |
| RAID support | Yes |
| Packaging data | |
| Package width | 275 mm |
| Package depth | 275 mm |
| Package height | 67.5 mm |
| Package weight | 1.52 kg |
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