Asus Prime B840 Plus Wifi Motherboard
Build a capable and future-ready system with the Asus Prime B840-PLUS WIFI. This ATX motherboard utilizes the latest AMD B840 chipset for the AM5 socket, supporting Ryzen™ 9000, 8000, & 7000 Series processors. Furthermore, it offers high-speed DDR5 memory support, ample storage options including three M.2 slots, and modern connectivity like Wi-Fi 6E and 2.5Gb Ethernet. Consequently, it provides a solid and versatile foundation for mainstream gaming and productivity builds.

Discover Balanced Performance and Connectivity
This Prime series board is engineered to leverage the power of modern AMD Ryzen CPUs. It supports high-speed DDR5 memory up to 7600+ MT/s (OC), enhanced with AMD EXPO™ and ASUS AEMP profiles for easy optimization. Additionally, the primary PCIe 4.0 x16 slot (with SafeSlot Core+) is ready for today’s powerful graphics cards. Storage flexibility is excellent, featuring three M.2 slots (two PCIe 4.0, one PCIe 3.0) and four SATA 6Gb/s ports, allowing for a mix of fast SSDs and larger capacity drives.

Stay connected with comprehensive networking options. The Prime B840-PLUS WIFI includes fast Realtek 2.5Gb Ethernet and onboard Wi-Fi 6E for high-speed wired and wireless connections, plus Bluetooth® 5.3. Moreover, USB connectivity is robust, featuring rear USB 10Gbps ports (Type-A and Type-C®) and internal headers for front panel connections. ASUS 5X Protection III provides hardware safeguards for longevity, while Q-Design features like Q-Antenna and Q-LED Core simplify the build process. Finally, VRM heatsinks and Fan Xpert 2+ ensure stable operation through effective cooling management.
Key Specifications
- Model: PRIME B840-PLUS WIFI
- CPU Socket: AM5 (Ryzen™ 9000/8000/7000 Series)
- Chipset: AMD B840
- Memory: 4x DDR5 DIMM, Max. 256GB, up to 7600MHz+ (OC), EXPO/AEMP
- Expansion Slots: 1x PCIe 4.0 x16, 1x PCIe 3.0 x16 (x4 mode), 2x PCIe 3.0 x16 (x1 mode), 1x PCIe 3.0 x1
- Storage: 2x M.2 PCIe 4.0 x4, 1x M.2 PCIe 3.0 x4, 4x SATA 6Gb/s
- Networking: Realtek 2.5Gb Ethernet, Wi-Fi 6E (802.11ax), Bluetooth 5.3
- Rear USB: 1x USB 10Gbps (Type-C®), 1x USB 10Gbps (Type-A), 2x USB 5Gbps (Type-A), 4x USB 2.0 (Type-A)
- Audio: Realtek 7.1 Surround Sound CODEC
- Form Factor: ATX
- Special Features: 5X Protection III, Q-Design (Q-Antenna, Q-LED Core), VRM Heatsink, Flexible M.2 Heatsink, EZ DIY (BIOS FlashBack™), Aura Sync, Thunderbolt™ (USB4®) Header
Questions & Answers
Who is this Motherboard for?
This motherboard is designed for mainstream PC builders and gamers using the AMD AM5 platform (Ryzen 7000/8000/9000 series). Specifically, it suits users who want a full-size ATX board with a solid mix of modern features like DDR5 support, triple M.2 slots, 2.5Gb LAN, and Wi-Fi 6E, but don’t necessarily need PCIe 5.0 capabilities.
Why Choose This Motherboard?
Choose this board for its well-rounded feature set on the new B840 chipset. It offers broad compatibility with Ryzen processors and high-speed DDR5 memory. Key advantages include ample storage with three M.2 slots, fast networking options (2.5Gb Ethernet and Wi-Fi 6E), and useful ASUS features like 5X Protection III and Q-Design elements. Therefore, it provides a reliable and versatile ATX platform for current-gen AMD builds.
What are the Pros?
Pros: Supports latest Ryzen CPUs; high-speed DDR5 support (7600+ MT/s OC); triple M.2 slots for storage flexibility; integrated Wi-Fi 6E and 2.5Gb Ethernet; USB 10Gbps ports on rear I/O; ATX form factor for good expansion; reliable 5X Protection III features; useful Q-Design and EZ DIY elements.
What are the Cons?
Cons: Lacks PCIe 5.0 support for graphics or M.2 slots; B840 chipset likely has fewer features/lanes than B850/X870; basic Realtek audio codec; limited number of high-speed rear USB ports compared to premium boards.
The Verdict
The Asus Prime B840-PLUS WIFI offers a capable and well-balanced entry into the latest AMD AM5 ecosystem using the new B840 chipset. It delivers essential modern features like high-speed DDR5 support, triple M.2 slots, 2.5Gb LAN, and Wi-Fi 6E in a standard ATX form factor. While it forgoes PCIe 5.0, its focus on providing a solid foundation with good connectivity and ASUS reliability makes it a strong choice for mainstream users building powerful and versatile Ryzen systems. It’s a practical option among the new generation of AM5 motherboards.
Find more details on the official ASUS Prime product page.
Consider pairing it with compatible AMD Ryzen processors or explore our DDR5 memory kits.


















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