PRIME B850M-K Gaming AMD AM5 (Ryzen 9000, DDR5, 2x M.2, PCIe 5.0, BIOS Flashback, Aura Sync)
B850M-K
ASUS Prime series motherboards are expertly engineered to unleash the full potential of AMD Ryzen™ 9000 series processors. The PRIME B850M-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 CPU fan connectors |
1 |
| Number of chassis fan connectors |
3 |
| EPS power connector (8-pin) |
Yes |
| Number of COM connectors |
1 |
| 12V power connector |
Yes |
| TPM connector |
Yes |
| RGB LED pin header |
Yes |
| Rear panel I/O ports |
|---|
| USB 2.0 ports quantity |
4 |
| USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity |
2 |
| USB 3.2 Gen 2 (3.1 Gen 2) Type-A ports quantity |
2 |
| Ethernet LAN (RJ-45) ports |
1 |
| PS/2 ports quantity |
1 |
| HDMI ports quantity |
1 |
| DisplayPorts quantity |
1 |
| Line-in |
Yes |
| Microphone in |
Yes |
| 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 B850 |
| Audio output channels |
7.1 channels |
| Product colour |
Black |
| Cooling type |
Passive |
| Windows operating systems supported |
Windows 10 x64, Windows 11 |
| Expansion slots |
|---|
| PCI Express x16 (Gen 4.x) slots |
1 |
| PCI Express x16 (Gen 5.x) slots |
1 |
| Number of M.2 (M) slots |
2 |
| 1st M.2 largest key size |
2280 |
| 1st M.2 highest PCI Express generation |
5.0 |
| 2nd M.2 largest key size |
2280 |
| 2nd M.2 highest PCI Express generation |
4.0 |
| BIOS |
|---|
| BIOS type |
UEFI AMI |
| BIOS memory size |
256 Mbit |
| Packaging data |
|---|
| Package width |
564 mm |
| Package depth |
288 mm |
| Package height |
297 mm |
| Package weight |
1.07 kg |
| Weight & dimensions |
|---|
| Width |
244 mm |
| Depth |
221 mm |
| Packaging content |
|---|
| Screws included |
Yes |
| Cables included |
SATA |
