ASUS PRIME B550-PLUS AMD B550 ATX Motherboard AM4
ASUS
ASUS PRIME B550-PLUS AMD B550 ATX Motherboard AM4
The ASUS PRIME B550-PLUS is an AMD B550 ATX motherboard built for Ryzen 5000, 4000G, and 3000 series processors. It combines PCIe 4.0 storage support, comprehensive cooling headers, and intuitive BIOS tuning for builders who want stable performance and room to overclock without complexity.
Why this product
PCIe 4.0 M.2 with dual slots
Supports up to two M.2 drives with PCIe 4.0 x4 bandwidth on the primary slot, reaching 64 Gbps for fast NVMe SSD speeds.
Flexible cooling control
Fan Xpert 4 software manages up to four system fans, one CPU fan, and AIO pump headers with auto-tuning and manual curves.
Robust VRM and power design
Dual VRM heatsinks with thermal pads and DIGI+ VRM circuitry deliver stable power for overclocking and sustained loads.
USB 3.2 Gen 2 connectivity
Both Type-A and Type-C ports on the rear I/O for fast peripheral and external storage connections.
Aura Sync RGB integration
Two standard RGB headers and one addressable Gen 2 header sync lighting with compatible accessories through Aura software.
- ChipsetAMD B550
- CPU SocketAMD AM4
- Form FactorATX (12 × 9.6 inches)
- Memory SupportDDR4 up to 128 GB across 4 DIMM slots
- M.2 Slots2 (PCIe 4.0 x4 and SATA capable on primary)
- SATA Ports6 × SATA 6 Gbps
- Rear USB2 × USB 3.2 Gen 2 (Type-A and Type-C), 4 × USB 3.2 Gen 1, 2 × USB 2.0
- Video OutputDisplayPort 1.2 and HDMI 2.1
- SKUASU-4110
- EAN4718017782340
- Supports AMD Ryzen 5000 series, 4000G series, and 3000 series processors in the AM4 socket; check ASUS website for specific CPU support list.
- Accepts up to 128 GB of DDR4 memory across four DIMM slots at speeds from 2133 MHz to 4600 MHz (overclocked).
- Fits standard ATX cases (12 × 9.6 inches).
- Supports AMD 2-Way CrossFireX for dual-GPU configurations.
- PCIe 4.0 speeds on M.2 slot depend on CPU generation: available with Ryzen 5000 and 3000 series, but only PCIe 3.0 with 4000G series.
Best for
- Builders planning moderate overclocking with stable power delivery and room to tune fan curves via software.
- Content creators and gamers who want fast NVMe storage with PCIe 4.0 bandwidth without a higher-tier chipset cost.
- System builders who value customizable RGB lighting and straightforward BIOS tuning tools.
- Users seeking a balance of features and price with a well-established AMD AM4 ecosystem.
Trade-offs
- Threadripper or HEDT builds—this is AM4-only and limited to mainstream Ryzen CPUs.
- Users requiring more than two M.2 slots or more than six SATA ports without add-in cards.
- Workloads demanding 10 Gigabit Ethernet—this board includes 1 Gb Ethernet only.
- Those needing Wi-Fi connectivity—this board has no wireless option.
ASUS Prime series is expertly engineered to unleash the full potential of 3rd Generation AMD Ryzen platform. Boasting a robust power design, comprehensive cooling solutions and intelligent tuning options, Prime B550 series motherboards provide daily users and DIY PC builders a range of performance tuning options via intuitive software and firmware features.
Tune It Your Way
Comprehensive controls form the foundation of the ASUS Prime series. The Prime B550 motherboard packs flexible tools to tune every aspect of your system, enabling you to tweak performance settings to perfectly match the way you work – maximizing your productivity.
Intelligent Control
EPU
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.
Fan Xpert 4
Flexible Air- and Liquid-Cooling Controls
Fan Xpert 4 software provides comprehensive control over fans, water pumps and all-in-one (AiO) coolers.
Cool to the Core
Prime B550 series is engineered with multiple onboard heatsinks and an array of hybrid fan headers to ensure your rig stays cool and stable under intense workloads.
VRM Heatsink and Thermal Pads
Two massive VRM heatsinks with underneath thermal pads improve heat transfer from the MOSFETs and chokes for better cooling performance.
Build on a Solid Foundation
Prime B550 motherboard provides all the fundamentals to boost daily productivity, so your system will be ready for action with stable power, intuitive cooling and flexible transfer options.
PCIe 4.0 M.2 (up to 64 Gbps)
Achieve Speed With Onboard M.2
PCIe 4.0 M.2 Slot supports up to 22110 and provide NVMe SSD RAID support for an incredible performance boost.
CPU & Memory
| Brand | ASUS |
|---|---|
| CPU Socket | AMD AM4 |
| Supported CPUs | AMD Ryzen 5000 Series, 4000 G-Series, 3000 Series Desktop Processors |
| Chipset | AMD B550 |
| Memory Type | DDR4 |
| Memory Slots | 4 × DIMM |
| Max Memory | 128 GB |
| Memory Speeds | 2133 to 4600 MHz (with overclocking) |
Storage & Expansion
| M.2 Slots | 2 (both support 2242/2260/2280/22110 form factors) |
|---|---|
| Primary M.2 Speed | PCIe 4.0 x4 (64 Gbps) with Ryzen 5000/3000; PCIe 3.0 x4 with 4000G |
| M.2 Modes | NVMe PCIe and SATA |
| SATA Ports | 6 × SATA 6 Gbps |
| PCIe Slots | 1 × PCIe 4.0 x16 (CPU), 1 × PCIe 3.0 x16 (x4 mode, Chipset), 3 × PCIe 3.0 x1 |
| Multi-GPU Support | AMD 2-Way CrossFireX |
Connectivity & I/O
| Ethernet | 1 × Realtek 1 Gb (with LANGuard protection) |
|---|---|
| Audio Codec | Realtek ALC887/897 7.1-Channel High Definition |
| Video Outputs | 1 × DisplayPort 1.2, 1 × HDMI 2.1 (4K@60Hz) |
| Rear USB 3.2 Gen 2 | 1 × Type-A, 1 × Type-C (teal blue) |
| Rear USB 3.2 Gen 1 | 4 ports |
| Rear USB 2.0 | 2 ports |
| Internal USB 2.0 Headers | 2 (supports 4 additional USB 2.0 ports) |
| PS/2 | 1 × combo keyboard/mouse port |
Cooling & Power
| Fan Headers | 1 × CPU, 1 × CPU OPT, 3 × Chassis, 1 × AIO Pump |
|---|---|
| Fan Control | Fan Xpert 4 software with auto-tuning and manual curves |
| VRM Heatsinks | Dual aluminum heatsinks with thermal pads |
| Power Protection | ASUS DIGI+ VRM, Enhanced DRAM Overcurrent Protection, Overvoltage Protection, ESD Guards |
Features & Software
| RGB Lighting | 2 × Standard RGB headers, 1 × Addressable Gen 2 header |
|---|---|
| RGB Software | Aura Sync and Aura Creator |
| BIOS | 256 Mb Flash ROM, UEFI AMI with CrashFree BIOS 3 and EZ Flash 3 |
| Tuning Software | AI Suite 3 (TurboV EVO, EPU, Digi+ VRM, Fan Xpert 4), Armoury Crate |
| Energy Features | Energy Processing Unit (EPU) for power savings and Away mode |
| Included Cables | 2 × SATA 6 Gbps cables, M.2 screw package |
Physical
| Form Factor | ATX |
|---|---|
| Dimensions | 12 inches × 9.6 inches (30.5 cm × 24.4 cm) |
Shipping
All our products are shipped from the United Kingdom within 24 to 48 hours of purchase. See our Shipping and Returns page for full details.
Returns
- Tech Syndicate offers a full money-back guarantee on all purchases made in our store. If you are not satisfied with your purchase, we will provide a full refund, no questions asked.
- Refunds are available within 45 days of delivery.
- After the 45-day period you are no longer eligible for a refund, so we encourage you to try the product within the first few weeks to make sure it fits your needs.