





ASUS PRIME B840-PLUS WIFI Motherboard
- CPU socket
- AM5
- Chipset (MB)
- AMD B840 MB
- Form factor
- ATX
- Supported memory
- DDR5
- Number of memory slots
- 4
Description
ASUS PRIME B840-PLUS WIFI is an ATX motherboard for the AM5 platform, aimed at a stable mid-range build with a long lifespan ahead. It works with AMD Socket AM5 Ryzen 9000, 8000, and 7000 Series processors and gives you a modern set of features – from DDR5 memory to WiFi 6E and 2.5Gb LAN. Support for up to 256 GB RAM and three M.2 slots means you can comfortably use it for both gaming and more serious work. You also get current wireless standards with Bluetooth 5.3, plus decent built-in 7.1 audio.
What you get
With four DDR5 slots and a maximum of 256 GB RAM, you have enough room for upgrades, even if you start with a smaller kit, and support for up to 7600 MHz (OC) is a nice bonus if you want to squeeze more out of your Ryzen. The three M.2 slots allow you to separate the system disk, games, and projects onto separate NVMe devices – convenient for speed and organization. The main PCIe 4.0 x16 slot is ready for a modern GPU, while the additional PCIe 3.0 slots are convenient for a capture card, sound card, or other expansion module. The built-in WiFi 6E and 2.5Gb Ethernet give you the choice between fast wired and modern wireless internet, without relying on external adapters. Realtek 7.1 audio with 24-bit/192 kHz and premium capacitors is more than enough for a normal gaming and multimedia configuration without a separate sound card.
- Socket AM5 with AMD B840 chipset ensures compatibility with Ryzen 9000, 8000, and 7000 Series processors and allows smooth upgrades within the platform.
- Four slots for DDR5 memory with a maximum of 256 GB and up to 7600 MHz (OC) provide serious resources for gaming, streaming, and heavy multitasking.
- Support for dual-channel memory helps you get the most out of the bandwidth of DDR5 modules.
- Three M.2 slots (PCIe 4.0 x4 and 3.0 x4) allow you to build a fast NVMe storage solution for games, work, and projects without cluttering the system with SATA cables.
- Four SATA 6Gb/s ports with support for RAID 0, 1, 10 are suitable for additional SSD/HDD arrays – whether for archiving, projects, or media library.
- The built-in WiFi 6E (802.11ax) and Bluetooth 5.3 provide modern wireless connectivity for gaming, peripherals, and streaming without the need for separate cards.
- Realtek 2.5Gb Ethernet port is a good solution for fast and stable wired networking, especially if you are downloading large files or playing online.
- Realtek 7.1 Surround Sound with 24-bit/192 kHz and premium capacitors offers clear sound for games and movies without necessarily investing in a separate sound card.
- A rich set of expansion slots – 1 x PCIe 4.0 x16, plus several PCIe 3.0 x16/x1 – gives you flexibility for GPU and additional cards according to your needs.
Who it is suitable for
This motherboard is suitable if you want a balanced AM5 build for gaming and work, with prospects for upgrading RAM and storage in the coming years. It is a good choice for those who value built-in WiFi 6E and 2.5Gb LAN, but do not seek extreme overclocking features or expensive extras from the high-end series. If you are aiming for the highest class enthusiast settings and multiple PCIe 5.0 devices, you may feel limited here.
The combination of AM5, DDR5, three M.2 slots, and WiFi 6E makes ASUS PRIME B840-PLUS WIFI a very sensible foundation for a modern, long-term build without unnecessary luxury, but with all the important things in place.
Full specifications
- Manufacturer
-
ASUS
- CPU socket
-
AM5
- Chipset (MB)
- AMD B840
- Form factor
- ATX
- Supported processors
-
AMD Socket AM5 Ryzen™ 9000, 8000 and 7000 Series Processors
- Supported memory
-
DDR5
- Number of memory slots
- 4
- Maximum RAM capacity
- 256 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 Chipset1 x PCIe 3.0 x16 slot (support x4 mode)2 x PCIe 3.0 x16 slots (support x1 mode)1 x PCIe 3.0 x1 slot
- Power connector
-
1 x 8-pin +12V Power connector1 x 4-pin +12V Power connector1 x 24-pin Main Power connector
- BIOS
- 256 Mb Flash ROM, UEFI AMI BIOS
- Dimensions
- ATX - 30.5 x 24.4 cm
- Processor generation
-
7th generation8th generation9th generation
- Warranty
- 36 months
- OS
-
Support for Windows 10 and 11 64-bit
- M2 slot
-
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 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 2280 (supports PCIe 4.0 x4/x2 mode)AMD B840 ChipsetM.2_3 slot (Key M), type 2242/2260/2280 (supports PCIe 3.0 x4 mode
- USB ports
-
Rear USB (Total 8 ports)2 x USB 10Gbps port(s) (1 x Type-A + 1 x USB Type-C®)2 x USB 5Gbps ports (2 x Type-A)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
-
1 x Wi-Fi Module1 x BIOS Flashback Button1 x HDMI1 x Display Port1 x RJ-453 x Audio jacks
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