ASUS PRIME B550-PLUS AMD B550 ATX Motherboard Socket AM4
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About This Item
- AMD B550 chipset for Socket AM4 AMD Ryzen 3000 Series processors
- 4 x DIMM slots supporting up to 128 GB DDR4 memory at 4600 MHz
- 2 x M.2 slots including PCIe 4.0 support and 6 x SATA III connectors
- ATX form factor with 2-Way CrossFireX support and UEFI AMI BIOS
- 7.1 channel audio with Realtek LAN and comprehensive cooling heatsinks
- Rear I/O includes 4 x USB 3.2 Gen 1, 2 x USB 3.2 Gen 2, HDMI, and DisplayPort
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ASUS PRIME B550-PLUS | AMD B550 ATX Foundation
The ASUS PRIME B550-PLUS AMD B550 Socket AM4 ATX is engineered for builders seeking a stable base for 3rd Generation AMD Ryzen systems. This motherboard offers robust power delivery and essential connectivity for productivity and light creative work. It suits users who need a reliable platform without unnecessary extras. You get a solid foundation for daily computing tasks.
Technical Specifications at a Glance
| Metric | Spec. |
|---|---|
| Chipset | AMD B550 |
| Socket | AM4 |
| Memory | 4x DDR4 slots (up to 128GB) |
| M.2 Slots | 2 |
| Form Factor | ATX |
| LAN | Gigabit Ethernet (Realtek RTL8111H) |
Stable Power for Ryzen Processors
This board uses a robust power design to support AMD Ryzen 3000 Series CPUs reliably. The VRM heatsinks and thermal pads help manage heat during sustained workloads. So, your system maintains stability even under pressure. This is crucial for long-term component health.
Dual PCIe 4.0 M.2 Storage Speed
You get two M.2 slots for fast NVMe SSDs. One slot supports PCIe 4.0, delivering speeds up to 64Gbps. This reduces game load times and speeds up file transfers. The second M.2 slot uses PCIe 3.0 for flexible storage options. However, note that Wi-Fi is not included; you will need a separate adapter for wireless connectivity.
Comprehensive Cooling Controls
The Prime B550-PLUS features multiple hybrid fan headers. These allow you to connect PWM or DC fans for custom cooling curves. ASUS Fan Xpert 2+ software lets you tune these profiles easily. In practice, this helps keep your system quiet during light use and cool during intense tasks.
7.1-Channel Audio and Connectivity
Enjoy immersive audio with the onboard 7.1-channel Realtek codec. The board provides four USB 3.2 Gen 1 ports and two USB 3.2 Gen 2 ports for peripherals. It also includes HDMI and DisplayPort for basic display output if your CPU has integrated graphics. However, the onboard graphics card is not present; a dedicated GPU is required for video output.
Box contents
- ASUS PRIME B550-PLUS motherboard
- I/O shield
- SATA cables
- M.2 mounting screws
- User guide
Check before you buy
- Confirm your CPU is an AMD Ryzen 3000 Series or newer (Socket AM4).
- Verify your case supports ATX form factor and has sufficient clearance.
- Check that your memory kit is DDR4 and on the QVL for best compatibility.
- Confirm you have a dedicated graphics card, as this board has no integrated GPU.
Frequently Asked Questions
Q: Does the ASUS PRIME B550-PLUS support PCIe 4.0?
A: Yes, the primary M.2 slot and top PCIe x16 slot support PCIe 4.0 speeds.
Q: Can I use ECC memory with this motherboard?
A: The board supports ECC and non-ECC memory, but ECC functionality depends on the CPU.
Q: How many fans can I connect?
A: It includes multiple hybrid fan headers; exact count is not specified in the input.
Q: Is Wi-Fi built-in?
A: No, this model does not have Wi-Fi; use Ethernet or add a Wi-Fi card.
Q: What RAID levels are supported?
A: It supports RAID 0, 1, and 10 for SATA and M.2 storage configurations.
The Consultant’s Verdict & Warranty
Choose the ASUS PRIME B550-PLUS if you need a no-nonsense ATX board for a Ryzen 3000-series build. It is ideal for office users, students, and DIY builders who value stability and essential features. This board delivers reliable performance without overspending on extras you may not need. Covered by the standard Manufacturer Warranty.
| Internal I/O | |
|---|---|
| Number of M.2 (M) slots | 2 |
| Supported storage drive interfaces | M.2, SATA |
| USB 2.0 connectors | 2 |
| USB 3.2 Gen 1 (3.1 Gen 1) connectors | 1 |
| Number of SATA III connectors | 6 |
| Technical details | |
| Motherboard chipset family | AMD |
| Motherboard chipset | AMD B550 |
| Supported processor sockets | Socket AM4 |
| Parallel processing technology support | 2-Way CrossFireX |
| On-board graphics card | No |
| Motherboard form factor | ATX |
| Audio | |
| Audio output channels | 7.1 channels |
| Performance | |
| Motherboard chipset family | AMD |
| Motherboard chipset | AMD B550 |
| RAID levels | 0, 1, 10 |
| Supported processor sockets | Socket AM4 |
| Audio output channels | 7.1 channels |
| Motherboard form factor | ATX |
| Processor | |
| Processor manufacturer | AMD |
| Compatible processor series | AMD Ryzen 3000 Series |
| Supported processor sockets | Socket AM4 |
| Processor socket | Socket AM4 |
| Memory | |
| Number of memory slots | 4 |
| Memory slots type | DIMM |
| Supported memory types | DDR4-SDRAM |
| Supported memory clock speeds | 2133,2400,2666,2800,3000,3200,3333,3466,3600,3733,3866,4000,4133,4266,4400,4600 MHz |
| Maximum internal memory | 128 GB |
| ECC сompatibility | ECC & Non-ECC |
| Storage controllers | |
| Supported storage drive interfaces | M.2, SATA |
| RAID levels | 0, 1, 10 |
| RAID support | Yes |
| Graphics | |
| Parallel processing technology support | 2-Way CrossFireX |
| On-board graphics card | No |
| Rear panel I/O ports | |
| USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity | 4 |
| USB 3.2 Gen 2 (3.1 Gen 2) Type-A ports quantity | 2 |
| USB 2.0 ports quantity | 2 |
| HDMI ports quantity | 1 |
| Ethernet LAN (RJ-45) ports | 1 |
| DisplayPorts quantity | 1 |
| Network | |
| Ethernet LAN | Yes |
| Wi-Fi | No |
| LAN controller | Realtek RTL8111H |
| Ethernet interface type | Gigabit Ethernet |
| Features | |
| Motherboard chipset family | AMD |
| Motherboard chipset | AMD B550 |
| Supported processor sockets | Socket AM4 |
| Audio output channels | 7.1 channels |
| Motherboard form factor | ATX |
| Harmonized System (HS) code | 84733020 |
| Product colour | Black, Silver |
| Expansion slots | |
| Number of M.2 (M) slots | 2 |
| PCI slots | 2 |
| BIOS | |
| BIOS type | UEFI AMI |
| BIOS memory size | 256 Mbit |
| Logistics data | |
| Harmonized System (HS) code | 84733020 |
| Weight & dimensions | |
| Height | 67 mm |
| Weight | 1 kg |
| Other features | |
| Height | 67 mm |
| Weight | 1 kg |
| Identifiers | |
| Distributor SKUs | MBD-90MB14U0-M0EAY0, 5773843, 119011, PRIME B550-PLUS, 346770, STD10130086, STD10005603, CL90MB14U0-M0EAY0 |
| Additional EANs | 0192876607770 |

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