






ASUS PRIME B840M-A WIFI AM5 Motherboard
- CPU socket
- AM5
- Chipset (MB)
- AMD B840 MB
- Form factor
- Micro ATX
- Supported memory
- DDR5
- Number of memory slots
- 4
Description
ASUS PRIME B840M-A WIFI AM5 is a Micro ATX motherboard for the AM5 platform, aimed at a stable mid-range build with a modern set of features. You get support for Ryzen 9000, 8000, and 7000 series processors, DDR5 memory, and built-in WiFi 6E, so you're not tied to a cable right away. The AMD B840 chipset gives you a solid foundation for gaming and work, without unnecessary 'luxury' additions that only raise the price. The Micro ATX form factor is convenient for more compact cases, but without serious compromises in expandability.
What you get
The AM5 socket supporting Ryzen 9000, 8000, and 7000 series means you can step into both current and next-generation CPUs without immediately thinking about a new motherboard. The four DDR5 slots with a maximum capacity of up to 192 GB and frequencies up to 7600 MHz (OC) give you serious room – from a standard gaming build to heavy multitasking and working on large projects. The three M.2 slots, combined with four SATA 6Gb/s ports and RAID 0/1/10 support, allow you to set up a very fast NVMe + mass storage solution according to your needs. The built-in WiFi 6E and Bluetooth 5.3 eliminate the need for additional cards or dongles and make your machine ready for modern wireless networks and peripherals. Realtek 7.1 audio with support for up to 24-bit/192 kHz and premium capacitors is more than enough for quality sound in games, movies, and everyday use.
- The motherboard uses AM5 socket, making it compatible with current AMD Ryzen generations and ensuring a longer lifespan for the platform.
- The AMD B840 chipset offers a balanced set of features for gaming and productivity without unnecessary additions that would increase the system's cost.
- With 4 DDR5 slots, dual-channel memory, and a maximum of 192 GB RAM, you can configure both a budget and a seriously loaded machine.
- Support for memory up to 7600 MHz (OC) allows you to extract more performance from Ryzen processors at higher frequencies.
- A total of 3 x M.2 slots (PCIe 4.0 and 3.0 depending on CPU/chipset) allow you to combine several NVMe SSDs for fast booting and working with large projects or game libraries.
- 4 x SATA 6Gb/s ports with support for RAID 0, 1, 10 are suitable for a mass storage array – whether for games, media, or backup.
- The built-in WiFi 6E (802.11ax) and Bluetooth 5.3 provide you with modern wireless connections, while the Realtek 2.5Gb Ethernet port is ready for fast wired networking.
- Realtek 7.1 Surround Sound audio with up to 24-bit/192 kHz and premium capacitors delivers clear sound without the need for a separate sound card for most scenarios.
- Expansion slots with PCIe 4.0 x16 for the graphics card and additional PCIe 3.0 x16 (x1) slots allow you to add expansion cards as needed.
Who it is suitable for
This board is suitable if you are looking for an AM5 build for gaming and productivity in a more compact case, with WiFi 6E and good upgrade options for RAM and storage. It is a good choice for Ryzen 7000/8000/9000 configurations where you want PCIe 4.0 NVMe speed, plenty of RAM, and stable network connectivity. It is not aimed at extreme overclocking or flashy high-end builds with tons of extra features, but rather at a reasonably balanced system.
The combination of AM5, DDR5 up to 192 GB, three M.2 slots, and built-in WiFi 6E makes ASUS PRIME B840M-A WIFI AM5 a very practical foundation for a long-term build. You get a modern platform with enough expandability and features without paying for unnecessary 'bling'.
Full specifications
- Manufacturer
-
ASUS
- CPU socket
-
AM5
- Chipset (MB)
- AMD B840
- Form factor
- Micro ATX
- Supported processors
-
Supports AMD Socket AM5 Ryzen™ 9000, 8000 and 7000 Series Processors
- Supported memory
-
DDR5
- Number of memory slots
- 4
- Maximum RAM capacity
- 192 GB
- Memory frequency (MHz)
-
7600(OC) MHz
- Support for dual-channel memory
- Yes
- Built-in audio
-
Realtek 7.1 Surround Sound High Definition Audio CODECSupports up to 24-Bit/192 kHz playbackPremium audio capacitors
- Built-in Wi-Fi
-
WiFi 6E (802.11ax)
- Bluetooth version
- Bluetooth V5.3
- Built-in LAN
-
1 x Realtek 2.5Gb Ethernet port
- SATA interface
- 4 x SATA 6Gb/s
- RAID support
- 0,1,10
- Expansion slots
-
AMD Ryzen™ 9000 & 7000 Series Desktop Processors1 x PCIe 4.0 x16 slot (supports x16 mode)AMD Ryzen™ 8000 Series Desktop Processors1 x PCIe 4.0 x16 slot (supports x8/x4 mode)AMD B840 Chipset2 x PCIe 3.0 x16 slots (support x1 mode)
- Power connector
-
1 x 24-pin Main Power connector1 x 8-pin +12V Power connector
- Dimensions
- Micro ATX - 24.4 x 24.4 cm
- Processor generation
-
7th generation8th generation9th generation
- Warranty
- 36 months
- OS
-
Support for Windows 10 and 11 64-bit
- M2 slot
-
Total supports 3 x M.2 slotsAMD Ryzen™ 9000 & 7000 Series Desktop ProcessorsM.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 ProcessorsM.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 ChipsetM.2_3 slot (Key M), type 2280 (supports PCIe 3.0 x4 mode)
- USB ports
-
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 ports2 x USB 2.0 headers support 4 additional USB 2.0 ports* USB Type-C® power delivery output: max. 5V/3A
- Rear I/O panel
-
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 DisplayPort1 x HDMI™ port1 x Wi-Fi module1 x Realtek 2.5Gb Ethernet port3 x Audio jacks1 x BIOS FlashBack™ button
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