ASUS Prime B550-PLUS AMD AM4 ATX Motherboard

The ASUS Prime B550-PLUS delivers robust performance for AMD Ryzen 3rd Generation processors with a comprehensive feature set designed for productivity and reliability. This ATX motherboard combines PCIe 4.0 support, dual M.2 slots, and intelligent cooling solutions in a foundation built for daily computing and DIY PC builds.

AMD B550 Platform Performance

Built around the AMD B550 chipset with AM4 socket compatibility, this motherboard supports 3rd Gen AMD Ryzen processors with full PCIe 4.0 capabilities. The robust power delivery system features VRM heatsinks with thermal pads to ensure stable operation under demanding workloads, while the PCH heatsink maintains optimal chipset temperatures.

High-Speed Storage and Connectivity

Two M.2 slots support PCIe 4.0 NVMe SSDs up to 22110 size, delivering transfer speeds up to 64 Gbps with RAID configuration support. Six SATA III ports provide additional storage expansion. Connectivity includes USB 3.2 Gen 2 Type-A and Type-C ports, Gigabit Ethernet, and dual display outputs via HDMI and DisplayPort for integrated graphics.

Memory and Expansion

Four DDR4 DIMM slots support up to 128GB of system memory with speeds reaching 4600MHz (OC) on compatible Ryzen processors. Expansion options include one PCIe 4.0 x16 slot, one PCIe 3.0 x16 slot (x4 mode), and three PCIe 3.0 x1 slots. AMD 2-Way CrossFireX technology is supported for multi-GPU configurations.

Comprehensive Cooling Control

Fan Xpert 4 technology manages multiple fan headers including dedicated CPU, CPU_OPT, AIO_PUMP, and three chassis fan connectors. This intelligent cooling system automatically adjusts fan speeds based on temperature sensors to maintain optimal thermal performance while minimizing noise levels.

Audio and RGB Customization

Realtek ALC887 7.1-channel audio codec with premium Japanese capacitors delivers clear sound quality. Audio shielding separates analog and digital signal domains to reduce interference, while separate PCB layers for left and right tracks minimize crosstalk. Aura Sync RGB headers support addressable Gen 2 LED strips for synchronized lighting effects across compatible hardware.

Build Quality and Features

The motherboard includes comprehensive I/O options with optical S/PDIF output, multiple USB configurations, and flexible internal headers for system expansion. BIOS-level tuning options provide performance customization without additional software, while the included I/O shield, SATA cables, and M.2 mounting hardware ensure a complete installation experience.

Description

Specification

• Motherboard Type: Desktop
• Form Factor: ATX
• Socket: AMD AM4
• Chipset: AMD B550
• #Hide#DDR Type: DDR4
• CPU Support: Click here for CPU support
  
  *Note: not compatible with Ryzen 5 3400G & Ryzen 3 3200G CPUs
• RAM Technology: DDR4 (Dual Channel)
• RAM Slots: 4 x DIMM
• RAM Speeds: 3rd Gen AMD Ryzen CPUs:
  4600(O.C)/4400(O.C)/4266(O.C.)/4133(O.C.)/4000(O.C.)/3866(O.C.)/3733(O.C.)/3600(O.C.)/3466(O.C.)/3333(O.C.)/3200/3000/2800/2666/2400/2133 MHz
  
  Next Gen AMD Ryzen PRO CPUs:
  4800(O.C.)/4600(O.C)/4466(O.C.)/4400(O.C)/4266(O.C.)/4133(O.C.)/4000(O.C.)/3866(O.C.)/3600(O.C.)/3466(O.C.)/3200/3000/2800/2666/2400/2133 MHz
• Maximum Memory: 128GB
• Graphics: Integrated Graphics Processor*
  
  Graphics specifications may vary between CPU types
• Graphics Ports: 1 x HDMI
  1 x DisplayPort
• Multi-GPU Support: Supports AMD 2-Way CrossFireX Technology
• PCI/PCI Express: 1 x PCIe 4.0 x16 (x16 mode)
  1 x PCIe 3.0 x16 (x4 mode)
  3 x PCIe 3.0 x1
• Storage: 6 x SATA III
  2 x M.2 (2242/2260/2280/22110) - SATA & PCIe
• RAID: "RAID 0, 1, 10"
• Wireless: -
• LAN: GB LAN
• Audio: Realtek ALC887 7.1-Channel High Definition Audio CODEC
• USB Ports Supported: "2 x USB 3.2 Gen2 (1 Type-A & 1 Type-C at back)
  6 x USB 3.2 Gen1 (4 at back, 2 at mid-board)
  6 x USB 2.0 (2 at back, 4 at mid-board)"
• Back Panel I/O Ports: 1 x DisplayPort
  1 x HDMI
  1 x LAN (RJ45)
  2 x USB 3.2 Gen2 (Type-A & Type-C)
  4 x USB 3.2 Gen1 (Type-A)
  2 x USB 2.0
  1 x Optical S/PDIF out
  5 x Audio jacks
• Internal I/O Connectors: 1 x CPU Fan
  1 x CPU OPT Fan
  3 x Chassis Fan
  1 x AIO_PUMP
  2 x Aura RGB Strip
  1 x Addressable Gen2
  1 x USB 3.2 Gen1
  2 x USB 2.0
  2 x M.2 Socket 3 with M key
  1 x SPI TPM
  6 x SATA 6Gb/s
  1 x Thunderbolt
• .: 1 x 24-pin EATX
  1 x 8-pin EATX 12V
  1 x Front audio
  1 x Thermal sensor
  1 x Clear CMOS
  1 x System panel
  1 x COM port
• Accessories: I/O Shield
  2 x SATA 6Gb/s cables
  1 x M.2 SSD screw package
• Additional Features: See Overview
• Package Type: Retail
• Package Weight: 1.3500 kg
• Warranty: 3 Years
• #Hide#M.2 Slot(s): Yes (M.2)
• #Hide#No. LAN Ports: 1 x LAN
• #Hide#Max LAN Speed: GB LAN