ASRock B550 Pro4

The ASRock B550 Pro4 is an ATX-format motherboard (30.5×24.4 cm) built on the AMD B550 chipset for the AM4 socket, compatible with desktop Ryzen 3000/3000 G-Series, 4000 G-Series, 5000, and 5000 G-Series processors. Processor power is delivered through an 8 Power Phase design with Digi Power, with additional power connectors including 24-pin ATX, 8-pin, and 4-pin 12V headers. Memory is supported via 4 DDR4 DIMM slots in dual-channel configuration, accommodating up to 128 GB total capacity with XMP support and frequencies up to DDR4 4733+ (OC) depending on the processor. For graphics cards and expansion modules, the board provides 2 PCI Express x16 slots (the first operates in Gen4 x16 mode with Ryzen Vermeer/Matisse or Gen3 with APU; the second is Gen3 x4) and 2 PCIe 3.0 x1 slots, with AMD CrossFireX support enabled. The storage subsystem includes 6 SATA3 ports at 6 Gbps with RAID 0/1/10 capabilities, plus two M.2 slots: the Hyper M.2 (M2_1) supporting PCIe Gen4 x4 at 64 Gbps (with Vermeer/Matisse) and M.2 (M2_3) supporting either SATA3 or PCIe Gen3 x2 at 16 Gbps; the M2_3 slot shares bandwidth with SATA3_5_6. For integrated graphics, the board offers video outputs including HDMI (up to 4K@60 with HDR and HDCP 2.3) and D-Sub (up to 1920×1200@60). The rear I/O panel features PS/2, 1×USB 3.2 Gen2 Type-A, 1×USB 3.2 Gen2 Type-C, 4×USB 3.2 Gen1, an RJ-45 connector, and 3 audio jacks. Networking is handled by a Gigabit Realtek RTL8111H adapter with Wake-on-LAN and PXE support. Audio is delivered through 7.1 HD with the Realtek ALC1220/ALC1200 codec and Nahimic enhancement. The motherboard includes an M.2 Key-E slot for Wi-Fi/BT modules, SPI TPM header, COM header, 2 RGB and 2 addressable ARGB headers, and 6 fan connectors. The BIOS is a 256 Mb AMI UEFI implementation with graphical interface and Instant Flash capability; Windows 10/11 64-bit support is declared. The ASRock B550 Pro4 serves as a solid foundation for single-GPU configurations with NVMe Gen4 storage and extensive USB and SATA device connectivity.