GIGABYTE B550 Aorus Pro AM4 DDR4 AMD Motherboard

The Gigabyte B550 Aorus Pro is an ATX-form-factor motherboard (305 mm × 244 mm) built around the AMD B550 chipset and Socket AM4, designed to support 3rd Generation AMD Ryzen processors as well as AMD Ryzen processors with Radeon Graphics. At its core is a true 12+2 phase digital VRM with 50 A DrMOS power stages and a dedicated PWM controller, delivering stable, precise voltage to the CPU under sustained workloads. The VRM and M.2 modules are cooled by a Fins-Array heatsink combined with a Direct Touch Heatpipe arrangement, while individual M.2 Thermal Guards help prevent NVMe SSD throttling under load. Memory support is handled by four DDR4 DIMM slots capable of holding up to 128 GB (32 GB per DIMM) in dual-channel configuration. The board accepts ECC and non-ECC unbuffered modules and supports XMP profiles, with overclocked speeds reaching DDR4-5200 on 3rd Gen Ryzen or DDR4-5400 on Ryzen with Radeon Graphics processors. Storage is served by two M.2 Socket 3 connectors — the CPU-connected M2A slot supports PCIe 4.0 x4 and SATA SSDs up to 22110 mm in length, while the chipset-connected M2B slot runs PCIe 3.0 x4. Six SATA 6 Gb/s ports support RAID 0, 1, and 10 configurations. The primary PCIe x16 slot (PCIEX16) runs at PCIe 4.0 x16 with a 3rd Gen Ryzen CPU, providing future-ready GPU bandwidth. Connectivity on the rear I/O panel includes a Realtek 2.5 GbE LAN port (2.5 Gbit/1 Gbit/100 Mbit), one USB 3.2 Gen 2 Type-C port, two USB 3.2 Gen 2 Type-A ports, three USB 3.2 Gen 1 ports, and six USB 2.0 ports, alongside a single HDMI 2.1 output (4096×2160 @ 60 Hz, HDR, HDCP 2.3 — available when using a Ryzen APU). Audio is handled by the Realtek ALC1220-VB codec with WIMA capacitors, delivering 120 dB SNR on the rear line-out with 7.1-channel HD Audio and S/PDIF optical output. RGB Fusion 2.0 provides addressable LED and standard RGB strip headers for ecosystem-wide lighting synchronisation. Smart Fan 5 manages up to seven fan and pump headers with individual temperature-sensor inputs, water-cooling flow-rate detection, and FAN STOP support. BIOS updates can be applied without an installed CPU, memory, or GPU via the Q-Flash Plus button on the rear panel — a convenience feature particularly useful during initial platform builds. Verified Specifications: - Form Factor: ATX, 305 mm × 244 mm - Chipset: AMD B550 - Socket: AM4 (3rd Gen AMD Ryzen; AMD Ryzen with Radeon Graphics) - Memory: 4 × DDR4 DIMM, up to 128 GB, dual-channel, ECC/non-ECC unbuffered, XMP - VRM: True 12+2 phase digital, 50 A DrMOS per phase - PCIe: 1× PCIe 4.0 x16 (CPU), 1× PCIe 3.0 x4 (chipset), 1× PCIe 3.0 x2 (chipset), 2× PCIe x1 - Storage: 2× M.2 PCIe 4.0/3.0 x4 (with Thermal Guards), 6× SATA 6 Gb/s (RAID 0/1/10) - LAN: Realtek 2.5 GbE - Audio: Realtek ALC1220-VB, 7.1-channel HD Audio, 120 dB SNR rear output, S/PDIF optical - USB (rear): 1× USB-C 3.2 Gen 2, 2× USB-A 3.2 Gen 2, 3× USB 3.2 Gen 1, 6× USB 2.0 - HDMI: 1× HDMI 2.1 (APU only), 4096×2160 @ 60 Hz, HDR - BIOS: AMI UEFI, 256 Mbit flash, Q-Flash Plus - Warranty: 3 years