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Asus PRIME B840M-K (90MB1PK0M0EAY0)

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Asus PRIME B840M-K
Towards:home / office
Form Factor:micro-ATX
Socket:AM5
Chipset:AMD B840
BIOS:Ami
RAM slots:DDR5 2 sl
RAM form factor:DIMM
RAM clock:8000 MHz
Sound (channels):7.1
Connectors:HDMI, M.2
Power connector:24-pin
Processor power:8-pin
All specifications
Specifications PRIME B840M-K
Main
Featuresfor home/office
SocketAM5
Form factormicro-ATX
Power phases11 / 8+2+1 /
VRM heatsink
Size (HxW)244x221 mm
Chipset
ChipsetAMD B840
BIOSAmi
UEFI BIOS
RAM
DDR52 slot(s)
Memory moduleDIMM
Operation mode2 channel
Max. clock frequency8000 MHz
Max. memory128 GB
EXPO support
Drive interface
SATA 3 (6Gbps)4
M.2 connector2
M.22xPCIe 4x
M.2 version2x4.0
Integrated RAID controller
Expansion slots
PCIe 16x slots2 pcs
PCIe modes16x/4x
PCIe support4.0
Steel PCIe connectors
Internal connections
TPM connector
USB-A 2.02 pcs
USB-A 5Gbps1 pcs
USB-C 5Gbps1 pcs
ARGB LED strip3
Video outputs
HDMI output
Integrated audio
AudiochipRealtek
Sound (channels)7.1
Network interfaces
LAN (RJ-45)2.5 Gbps
LAN ports1
LAN controllerRealtek
External connections
USB-A 2.02 pcs
USB-A 5Gbps4 pcs
Power connectors
Main power socket24-pin
CPU power8-pin
Fan power connectors4
CPU Fan 4-pin1
Chassis/Water Pump Fan 4-pin3
Official Websiteasus.com
Added to E-CatalogMarch 2026
P/N
90MB1PK0M0EAY0

The information in the model description is for reference purposes.
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AMD Socket AM5 AMD Ryzen 7000 Series, AMD Ryzen 8000 Series, AMD Ryzen 9000 Series. PC micro ATX AMD B840 7.1 channels. DDR5-... moreSDRAM 2 DIMM Maximum internal memory: 128 GB. HDD & SSD M.2, SATA III RAID support Number of storage drives supported: 6. BIOS type: UEFI AMI 256 Mbit. 2.5 Gigabit Ethernet. B840M-K. ASUS Prime series motherboards are expertly engineered to unleash the full potential of AMD Ryzen™ 9000 series processors. The PRIME B840M-K motherboard provides users and PC DIY builders with a range of performance optimizations via intuitive software and firmware features. It’s designed to be Advanced AI PC-ready, offering the power and connectivity needed for demanding AI applications.. Processor. Processor manufacturer. AMD. Processor socket. Socket AM5. Compatible processor series. AMD Ryzen 7000 Series, AMD Ryzen 8000 Series, AMD Ryzen 9000 Series. Supported processor sockets. Socket AM5. Memory. Supported memory types. DDR5-SDRAM. Number of memory slots. 2. Memory slots type. DIMM. Memory channels. Dual-channel. ECC сompatibility. ECC & Non-ECC. Maximum internal memory. 128 GB. Unbuffered memory. Yes. Storage controllers. Supported storage drive types. HDD & SSD. Supported storage drive interfaces. M.2, SATA III. Number of storage drives supported. 6. Number of HDDs supported. 4. RAID support. Yes. RAID levels. 0, 1, 5, 10. Graphics. Parallel processing technology support. Not supported. Internal I/O. USB 2.0 connectors. 2. USB 3.2 Gen 1 (3.1 Gen 1) connectors. 2. Number of SATA III connectors. 4. S/PDIF out connector. Yes. Front panel audio connector. Yes. Front panel connector. Yes. ATX Power connector (24-pin). Yes. CPU fan connector. Yes. Number of chassis fan connectors. 3. EPS power connector (8-pin). Yes. 12V power connector. Yes. TPM connector. Yes. Number of COM connectors. 1. RGB LED pin header. Yes. Number of RGB LED pin headers. 3. Rear panel I/O ports. USB 2.0 ports quantity. 2. USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity. 4. Ethernet LAN (RJ-45) ports. 1. HDMI ports quantity. 1. Network. Ethernet LAN. Yes. Ethernet interface type. 2.5 Gigabit Ethernet. Wi-Fi. No. Top Wi-Fi standard. Not available. Features. Component for. PC. Motherboard form factor. micro ATX. Motherboard chipset family. AMD. Motherboard chipset. AMD B840. Audio output channels. 7.1 channels. Product colour. Black. Windows operating systems supported. Windows 10 x64, Windows 11. Expansion slots. PCI Express x16 (Gen 4.x) slots. 1. PCI Express x16 (Gen 3.x) slots. 1. Number of M.2 (M) slots. 2. BIOS. BIOS type. UEFI AMI. BIOS memory size. 256 Mbit. Packaging data. Package width. 270 mm. Package depth. 263 mm. Package height. 51.5 mm. Package weight. 1.02 kg. Weight & dimensions. Width. 244 mm. Depth. 221 mm. Packaging content. Screws included. Yes. Cables included. SATA
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