| Brand |
ASUS |
| Series |
PRIME |
| Model |
PRIME B840M-A WIFI |
| CPU |
AMD Socket AM5 for AMD Ryzen 9000 & 8000 & 7000 Series Desktop Processors* |
| 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/. |
| * 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 & 8000 & 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 B840 Chipset |
| M.2_3 slot (Key M), type 2280 (supports PCIe 3.0 x4 mode) |
| 4 x SATA 6Gb/s ports |
| * AMD RAIDXpert2 Technology supports both PCIe RAID 0/1/5/10 and SATA RAID 0/1/5/10. RAID 5 Function is only supported by AMD Ryzen 9000 series CPU. |
| Ethernet |
1 x Realtek 2.5Gb Ethernet |
| ASUS LANGuard |
| Wireless & Bluetooth |
Wi-Fi 6E |
| 2×2 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 |
| 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 System Panel 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 |
| 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 |
| Form Factor |
micro-ATX Form Factor |
| 9.6 inch x 9.6 inch (24.4 cm x 24.4 cm) |
| Warranty Information |
| Warranty |
3 Year Warranty |
