ASUS PRIME B840M-K
Motherboard | micro ATX | Socket AM5 | AMD B840 Chipset | USB 3.2 Gen 1, USB-C 3.2 Gen 1 | 2.5 Gigabit LAN | onboard graphics (CPU required) | HD Audio (8-channel)
Main Specification
| Product Description | ASUS PRIME B840M-K - motherboard - micro ATX - Socket AM5 - AMD B840 |
|---|---|
| Product Type | Motherboard - micro ATX |
| Chipset Type | AMD B840 |
| Processor Socket | 1 x Socket AM5 |
| Compatible Processors | (supports Ryzen 7000/8000/9000 Series) |
| Max RAM Size | 128 GB |
| RAM Supported | 2 DIMM slots - DDR5, non-ECC, ECC, on-die ECC, unbuffered |
| Storage Ports | 4 x SATA-600 (RAID), 2 x M.2 |
| USB / FireWire Ports | 4 x USB 3.2 Gen 1 + 2 x USB 2.0 + (1 x USB-C 3.2 Gen 1 + 2 x USB 3.2 Gen 1 + 4 x USB 2.0 via headers) |
| Audio | HD Audio (8-channel) |
| LAN | 2.5 Gigabit Ethernet |
General
| Product Type | Motherboard - micro ATX |
|---|---|
| Chipset Type | AMD B840 |
| Processor Socket | Socket AM5 |
| Max Processors Qty | 1 |
| Compatible Processors | (supports Ryzen 7000/8000/9000 Series) |
Supported RAM
| Max Size | 128 GB |
|---|---|
| Technology | DDR5 |
| Bus Clock | 8000 MT/s (O.C.) |
| Supported RAM Integrity Check | Non-ECC, ECC, on-die ECC |
| Registered or Buffered | Unbuffered |
| Features | AMD EXPO technology, dual channel memory architecture, Intel Extreme Memory Profiles (XMP) |
Audio
| Type | HD Audio (8-channel) |
|---|---|
| Compliant Standards | High Definition Audio |
LAN
| Network Interfaces | 2.5 Gigabit Ethernet |
|---|
Expansion / Connectivity
| Expansion Slots | 1 x CPU 2 x DIMM 288-pin 1 x PCIe 4.0 x16 1 x PCIe 3.0 x16 (x4 mode) 2 x M.2 socket (2280 M.2 Key M slot) |
|---|---|
| Storage Interfaces | SATA-600 -connectors: 4 x 7pin Serial ATA - RAID 0 / RAID 1 / RAID 10 / RAID 5 PCIe 4.0 -connectors: 2 x M.2 - RAID 0 / RAID 1 / RAID 10 / RAID 5 |
| Interfaces | 4 x USB 3.2 Gen 1 2 x USB 2.0 1 x HDMI 1 x LAN (2.5Gigabit Ethernet) 1 x microphone - mini-jack 1 x audio line-in - mini-jack 1 x audio line-out - mini-jack |
| Internal Interfaces | 1 x USB-C 3.2 Gen 1 - header 2 x USB 3.2 Gen 1 - header 4 x USB 2.0 - header 1 x serial - header 1 x audio - header 1 x SPDIF out - header 1 x SPI - header |
| Power Connectors | 24-pin main power connector, 8-pin ATX12V connector |
Features
| BIOS Type | AMI |
|---|---|
| BIOS Features | UEFI BIOS, ASUS EZ Flash 3, ASUS UEFI BIOS EZ Mode |
| Sleep / Wake Up | Wake on LAN (WOL), wake on PME |
| Hardware Features | Preboot eXecution Environment (PXE), ASUS Enhanced Memory Profile (AEMP), CrashFree BIOS 3, LANGuard, ASUS 5X Protection III, ASUS Aura Sync, ASUS DIGI+ VRM, ASUS Overvoltage Protection, ASUS Q-Design, ASUS SafeSlot Core+, ASUS Stainless Steel Back I/O, Q-Dashboard, Q-DIMM, Q-LED, Q-Slot, VRM heatsink design, 8+2+1 Phase Power Design, ASUS EZ DIY, chipset heatsink, AI Cache Boost, 6 Layer PCB |
Miscellaneous
| Included Accessories | IO shield, M.2 screw package |
|---|---|
| Cables Included | 2 x Serial ATA cable |
| Software Included | Adobe Creative Cloud (free trial), Armoury Crate, ASUS AI Advisor, ASUS AURA Creator, ASUS CPU-Z, ASUS DriverHub, ASUS Fan Xpert 2+, Norton 360 Deluxe (60 days trial), TurboV Core, WinRAR (40 days trial) |
| Width | 24.4 cm |
| Depth | 22.1 cm |
Product features
Efficient processor support
The motherboard features a Socket AM5 designed to accommodate AMD Ryzen 7000/8000/9000 Series processors, providing a solid foundation for a high-performance system.High-speed memory capabilities
With support for DDR5 SDRAM and speeds up to 8000 MT/s (overclocked), this motherboard ensures fast data access and enhanced performance for demanding applications.Extensive connectivity options
The included USB 3.2 Gen 1 ports along with HDMI, LAN, and audio interfaces provide versatile connectivity, facilitating seamless integration with various devices.Robust expansion options
Featuring multiple slots such as PCIe 4.0 and M.2, the motherboard allows for various upgrades and installations, accommodating additional components to enhance system capabilities.Reliable protective features
Equipped with ASUS 5X Protection III and other safety measures, this motherboard is designed for durability and stability, ensuring long-term reliability for the system.Key selling points
- Supports AMD Ryzen 7000/8000/9000 Series processors
- Up to 8000 MT/s memory support for DDR5 SDRAM
- Multiple expansion slots for upgrades with PCIe 4.0 and DIMM options
- Includes advanced connectivity options like USB 3.2 Gen 1 and HDMI
- Features ASUS Aura Sync for customizable lighting
References
MPN: 90MB1PK0-M0EAY0
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28/08/2026 21:58:18