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ASUS Prime B550M-A/CSM AMD B550 Socket AM4 micro ATX
861501 90MB14I0-M0EAYC
4718017755535
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All-around Energy Efficiency
With the Energy Processing Unit (EPU), you'll enjoy system-wide power savings. The EPU automatically optimizes power consumption and maximizes savings with Away mode.
Flexible Cooling Controls
Fan Xpert 2+ software provides comprehensive control over system fans. Auto-Tuning mode intelligently configures all parameters with a single click. There's also an Extreme Quiet mode that reduces chassis fan speeds to below the default minimum to keep your system whisper-quiet when performing light tasks. Fans can also be controlled via the UEFI BIOS.
Precise Digital Power Control
The Digi+ voltage-regulator module (VRM) delivers real-time control over voltage droop, automatically switching frequency and power-efficiency settings. It also allows you to fine-tune your CPU for ultimate stability and performance.
Processor | |
| Compatible processor series | AMD Ryzen 3000 Series |
| Processor socket | Socket AM4 |
| Processor manufacturer | AMD |
Memory | |
| Maximum internal memory | 128 GB |
| Supported memory clock speeds | 2133, 2400, 2666, 2800, 3000, 3200, 3466, 3600, 3866, 4000, 4133, 4400, 4600, 3333, 3733, 4266 |
| Supported memory types | DDR4-SDRAM |
| Memory slots type | DIMM |
| Unbuffered memory | Yes |
| Number of memory slots | 4 |
Storage controllers | |
| Supported storage drive interfaces | M.2, SATA III |
Graphics | |
| On-board graphics card | No |
Internal I/O | |
| Number of SATA connectors | 0 |
| USB 2.0 connectors | 2 |
| CPU fan connector | Yes |
| ATX Power connector (24-pin) | Yes |
| Number of chassis fan connectors | 2 |
| Number of Parallel ATA connectors | 0 |
| Front panel audio connector | Yes |
| USB 3.2 Gen 1 (3.1 Gen 1) connectors | 1 |
| Number of SATA II connectors | 0 |
| Number of SATA III connectors | 4 |
| EPS power connector (8-pin) | Yes |
| USB 3.2 Gen 2 (3.1 Gen 2) connectors | 0 |
Rear panel I/O ports | |
| PS/2 ports quantity | 1 |
| USB 2.0 ports quantity | 0 |
| Ethernet LAN (RJ-45) ports | 1 |
| Headphone outputs | 1 |
| Microphone in | Yes |
| VGA (D-Sub) ports quantity | 1 |
| DVI-D ports quantity | 1 |
| HDMI ports quantity | 1 |
| USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity | 4 |
| USB 3.2 Gen 1 (3.1 Gen 1) Type-C ports quantity | 0 |
| USB 3.2 Gen 2 (3.1 Gen 2) Type-A ports quantity | 2 |
| USB 3.2 Gen 2 (3.1 Gen 2) Type-C ports quantity | 0 |
Network | |
| LAN controller | Realtek RTL8111H |
| Ethernet interface type | Gigabit Ethernet |
| Ethernet LAN | Yes |
| Wi-Fi | No |
Features | |
| Motherboard form factor | micro ATX |
| Motherboard chipset | AMD B550 |
| Audio output channels | 7.1 channels |
| Motherboard chipset family | AMD |
| Component for | PC |
| Windows operating systems supported | Windows 10 x64 |
| Audio chip | Realtek ALC887 |
| Product colour | Black, Silver |
Expansion slots | |
| PCI Express x1 (Gen 3.x) slots | 2 |
| PCI Express x16 (Gen 4.x) slots | 1 |
BIOS | |
| BIOS type | UEFI AMI |
| BIOS memory size | 256 Mbit |
| Clear CMOS jumper | Yes |
Weight & dimensions | |
| Width | 244 mm |
| Depth | 244 mm |
| Height | 51 mm |
Other features | |
| Weight | 845 g |
| mSATA ports quantity | 0 |
Logistics data | |
| Harmonized System (HS) code | 84733020 |