ASUS AM5 MicroATX PRIME B840M-A WIFI-CSM WiFi 6E Motherboard
Web ID: 44251
CPU Socket: AMD AM5 (7000 Series) || AMD AM5 (8000 Series) || AMD AM5 (9000 Series)
Form Factor: Micro-ATX
Chipset: AMD B840
Memory Type: DDR5
WiFi Standard: Wi-Fi 6E
Bluetooth: Bluetooth || Ver 5.3
PCIe Interface: PCIe x16
Storage Interface: M.2 PCIe || SATA
LAN Speed: LAN || 2.5 Gigabit
Audio: 7.1 Channel
Video Interface: HDMI || DisplayPort
USB: USB 3.2 Type-A || USB 3.2 Type-C || USB 2.0
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Manufacturer Warranty: 3 Year
Manufacturer PN: PRIME B840M-A WIFI-CSM
$329
| CPU | AMD Socket AM5 for AMD Ryzen™ 9000 & 8000 & 7000 Series Desktop Processors* |
| * Refer to https://www.asus.com/support/download-center/ for CPU support list. | |
| Chipset | AMD B840 Chipset |
| Memory | 4 x DIMM slots, max. 192GB, DDR5 Support up to 7600+MT/s (OC) with Ryzen™ 9000 & 8000 & 7000 Series Processors, ECC and Non-ECC, Un-buffered DIMM* |
| Dual channel memory architecture | |
| Supports AMD Extended Profiles for Overclocking (EXPO™) | |
| ASUS Enhanced Memory Profile (AEMP) | |
| * Supported memory types, data rate (speed), and number of DRAM modules vary depending on the CPU and memory configuration, for more information please refer to CPU/Memory Support list under the Support tab of product information site or visit https://www.asus.com/support/download-center/. Adjustments will be made based on the specifications of mass-produced memory products available on the market. | |
| * Non-ECC, un-buffered DDR5 memory supports On-Die ECC function. | |
| Graphics | 2 x DisplayPort** |
| 1 x HDMI™ port*** | |
| * Graphics specifications may vary between CPU types. Please refer to AMD CPU specifications. | |
| ** Supports max. 8K@30Hz as specified in DisplayPort 1.4. | |
| *** Supports 4K@60Hz as specified in HDMI 2.1. | |
| Expansion Slots | AMD Ryzen™ 9000 & 7000 Series Desktop Processors* |
| 1 x PCIe 4.0 x16 slot (supports x16 mode) | |
| AMD Ryzen™ 8000 Series Desktop Processors | |
| 1 x PCIe 4.0 x16 slot (supports x8/x4 mode)** | |
| AMD B840 Chipset | |
| 2 x PCIe 3.0 x16 slots (support x1 mode) | |
| * Please check the PCIe bifurcation table on the support site (https://www.asus.com/support/FAQ/1037507/). | |
| ** Specifications vary by CPU types. | |
| - To ensure compatibility of the device installed, please refer to https://www.asus.com/support/download-center/ for the list of supported peripherals. | |
| Storage | Total supports 3 x M.2 slots and 4 x SATA 6Gb/s ports |
| AMD Ryzen™ 9000 & 7000 Series Desktop Processors | |
| M.2_1 slot (Key M), type 2280 (supports PCIe 4.0 x4 mode) | |
| M.2_2 slot (Key M), type 2242/2260/2280 (supports PCIe 4.0 x4 mode) | |
| AMD Ryzen™ 8000 Series Desktop Processors | |
| M.2_1 slot (Key M), type 2280 (supports PCIe 4.0 x4 mode) | |
| M.2_2 slot (Key M), type 2242/2260/2280 (supports PCIe 4.0 x4/x2 mode)* | |
| AMD B840 Chipset | |
| M.2_3 slot (Key M), type 2280 (supports PCIe 3.0 x4 mode) | |
| 4 x SATA 6Gb/s ports | |
| * Specifications vary by CPU types. | |
| AMD RAIDXpert2 Technology | |
| Ryzen™ 9000 Series Processors: RAID 0/1/5/10 | |
| Ryzen™ 8000 Series Processors: RAID 0/1 | |
| Ryzen™ 7000 Series Processors: RAID 0/1/10 | |
| Ethernet | 1 x Realtek 2.5Gb Ethernet |
| ASUS LANGuard | |
| Wireless & Bluetooth® | Wi-Fi 6E 2x2 Wi-Fi 6E (802.11ax) Supports 2.4/5/6GHz frequency band* Bluetooth® v5.3** * WiFi 6E 6GHz regulatory may vary between countries, supported only in Windows 11 or later. ** The Bluetooth® version may vary, please refer to the Wi-Fi module manufacturer's website for the latest specifications. |
| USB | Rear USB (Total 7 ports) |
| 2 x USB 10Gbps ports (2 x Type-A) | |
| 1 x USB 5Gbps port (1 x USB Type-C®) | |
| 4 x USB 2.0 ports (4 x Type-A) | |
| Front USB (Total 7 ports) | |
| 1 x USB 5Gbps connector (supports USB Type-C®) | |
| 1 x USB 5Gbps header supports 2 additional USB 5Gbps ports | |
| 2 x USB 2.0 headers support 4 additional USB 2.0 ports | |
| * USB Type-C® power delivery output: max. 5V/3A | |
| Audio | Realtek 7.1 Surround Sound High Definition Audio CODEC* |
| - Supports: Jack-detection, Multi-streaming, Front Panel Jack-retasking | |
| - Supports up to 24-Bit/192 kHz playback | |
| Audio Features | |
| - Audio Shielding | |
| - Premium audio capacitors | |
| - Dedicated audio PCB layers | |
| * A chassis with an HD audio module in the front panel is required to support 7.1 Surround Sound audio output. | |
| Back Panel I/O Ports | 2 x USB 10Gbps ports (2 x Type-A) |
| 1 x USB 5Gbps port (1 x USB Type-C®) | |
| 4 x USB 2.0 ports (4 x Type-A) | |
| 2 x DisplayPort | |
| 1 x HDMI™ port | |
| 1 x Wi-Fi module | |
| 1 x Realtek 2.5Gb Ethernet port | |
| 3 x Audio jacks | |
| 1 x BIOS FlashBack™ button | |
| Internal I/O Connectors | Fan and Cooling Related |
| 1 x 4-pin CPU Fan header | |
| 1 x 4-pin CPU OPT Fan header | |
| 1 x 4-pin AIO Pump header | |
| 3 x 4-pin Chassis Fan headers | |
| Power Related | |
| 1 x 24-pin Main Power connector | |
| 1 x 8-pin +12V CPU Power connector | |
| Storage Related | |
| 3 x M.2 slots (Key M) | |
| 4 x SATA 6Gb/s ports | |
| USB | |
| 1 x USB 5Gbps connector (supports USB Type-C® ) | |
| 1 x USB 5Gbps header supports 2 additional USB 5Gbps ports | |
| 2 x USB 2.0 headers support 4 additional USB 2.0 ports | |
| Miscellaneous | |
| 3 x Addressable Gen 2 headers | |
| 1 x Clear CMOS header | |
| 1 x COM Port header | |
| 1 x Front Panel Audio header (F_AUDIO) | |
| 1 x S/PDIF Out header | |
| 1 x SPI TPM header (14-1 pin) | |
| 1 x 10-1 pin Front Panel System header | |
| Special Features | ASUS 5X PROTECTION III |
| - DIGI+ VRM | |
| - LANGuard | |
| - Overvoltage protection | |
| - SafeSlot Core+ | |
| - Stainless-steel back I/O | |
| ASUS Q-Design | |
| - Q-Antenna | |
| - Q-Dashboard | |
| - Q-DIMM | |
| - Q-LED Core | |
| - Q-Slot | |
| ASUS Thermal Solution | |
| - M.2 heatsink | |
| - VRM heatsink design | |
| ASUS EZ DIY | |
| - BIOS FlashBack™ button | |
| - BIOS FlashBack™ LED | |
| - Pre-mounted I/O shield | |
| Aura Sync | |
| - Addressable Gen 2 headers | |
| Software Features | ASUS Exclusive Software |
| Armoury Crate | |
| - Aura Creator | |
| - Aura Sync | |
| - Fan Xpert 2+ | |
| - Power Saving | |
| ASUS DriverHub | |
| ASUS GlideX | |
| TurboV Core | |
| ASUS CPU-Z | |
| Adobe Creative Cloud (Free Trial) | |
| Norton 360 Deluxe (60 Days Free Trial) | |
| WinRAR (40 Days Free Trial) | |
| UEFI BIOS | |
| ASUS EZ DIY | |
| - ASUS CrashFree BIOS 3 | |
| - ASUS EZ Flash 3 | |
| - ASUS UEFI BIOS EZ Mode | |
| - ASUS MyHotkey | |
| BIOS | 256 Mb Flash ROM, UEFI AMI BIOS |
| Manageability | WOL by PME, PXE |
| Accessories | Cables |
| 2 x SATA 6Gb/s cables | |
| Miscellaneous | |
| 1 x ASUS WiFi Q-Antenna | |
| 1 x M.2 rubber package | |
| 2 x Screw packages for M.2 SSD | |
| Documentation | |
| 1 x Quick start guide | |
| Operating System | Windows 11, Windows 10 64-bit |
| Form Factor | micro-ATX Form Factor |
| 9.6 inch x 9.6 inch (24.4 cm x 24.4 cm) | |
| Dimension | |
| Product (mm)_ L*W*H | 244mm*244mm*50mm |
| Color Box (mm)_ L*W*H | 275mm*275mm*67.5mm |
| Weight | |
| Motherboard only | 0.93kg |
| Full package | 1.52kg |
