Key Features
- Model: PRIME B840M-A WIFI-CSM
- Supported CPU: Ryzen 9000/8000/7000 Series Processors for Socket AM5
- RAM: 4x DDR5, up to 192GB, 7600+(OC) MT/s
- Graphics Output: 1x HDMI, 2 x DisplayPort
- Features: 1 x Realtek 2.5Gb, Wi-Fi 6E, Bluetooth v5.3
Specification
| Basic Information | ||
| Supported CPU | AMD Socket AM5 for AMD Ryzen 9000 & 8000 & 7000 Series Desktop Processors | |
| Chipset | AMD B840 Chipset | |
| BIOS | 256 Mb Flash ROM, UEFI AMI BIOS | |
| Form Factor | micro-ATX Form Factor 9.6 inch x 9.6 inch (24.4 cm x 24.4 cm) |
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| 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. |
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| Expansion Slots | ||
| PCI | 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) |
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| M.2 Socket | Total supports 3 x M.2 , (Key M), type 2242/2260/2280 | |
| Memory | ||
| Type | DDR5 | |
| Slots | 4 x DIMM slots | |
| Supported Memory | Supports up to 7600+MT/s (OC) with Ryzen 9000 & 8000 & 7000 Series Processors, ECC and Non-ECC, Un-buffered DIMM | |
| Maximum Memory | Max. 192GB | |
| Graphics | ||
| Graphics | 2 x DisplayPort** 1 x HDMI™ port*** |
|
| Connector & Ports | ||
| HDMI | 1x HDMI | |
| USB (s) | 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 |
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| LAN Port (s) | 1 x Realtek 2.5Gb Ethernet ASUS LANGuard |
|
| Wireless Communication module | Wi-Fi 6E 2×2 Wi-Fi 6E (802.11ax) Supports 2.4/5/6GHz frequency band Bluetooth v5.3 |
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| Supported 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. |
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| RAID | 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 |
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| Audio | 3 x Audio jacks | |
| Internal I/O Ports | 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 |
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| TPM (Trusted Platform Module ) | 1 x SPI TPM header (14-1 pin) | |
| Others | ||
| 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 |
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| Bundled Software | 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 |
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| Warranty Information | ||
| Manufacturing Warranty | 3 Years Warranty | |
