ASROCK B550M Phantom Gaming 4 DDR4 AMD Motherboard

The ASRock B550M Phantom Gaming 4 is a Micro-ATX motherboard built on the AMD B550 chipset, designed for AMD AM4 socket processors including Ryzen 3000 series, 4000 G-Series APUs, and Ryzen 5000 series desktop processors (note: not compatible with Ryzen 5 3400G or Ryzen 3 3200G). Its compact 9.6-inch × 9.6-inch (24.4 cm × 24.4 cm) footprint makes it a strong candidate for space-efficient gaming and productivity builds without sacrificing connectivity or expansion options. Power delivery is handled by an 8-phase digital power design featuring ASRock Super Alloy components, including a Premium 50A power choke and solid capacitors. The board uses a 2oz copper PCB with high-density glass fabric construction, contributing to stable signal integrity and thermal headroom during sustained workloads. Memory support is robust: four DDR4 DIMM slots accommodate up to 128GB of unbuffered ECC and non-ECC memory. With Ryzen 5000 series (Matisse) CPUs, speeds up to DDR4 4533+ (OC) are supported; with Ryzen 4000 G-Series APUs (Renoir), speeds up to DDR4 4733+ (OC) are achievable. XMP profiles are also supported, and DIMM slots feature 15μ gold contacts for long-term reliability. Storage options are comprehensive: a Hyper M.2 slot (M2_1) supports PCIe Gen4 x4 at up to 64 Gb/s with Matisse CPUs, a second M.2 slot (M2_2) supports PCIe Gen3 x2 or SATA3, and four SATA3 6.0 Gb/s ports with RAID 0, 1, and 10 support round out the lineup. Expansion slots include one PCIe 4.0 x16, one PCIe 3.0 x16 (running at x4 electrically), and one PCIe 3.0 x1, with AMD CrossFireX multi-GPU support. Display output is handled via HDMI 2.1 (up to 4K/60Hz) and DisplayPort 1.4 (up to 5K/120Hz). Audio is provided by a Realtek ALC887/897 codec delivering 7.1-channel HD audio with surge protection. Networking is via a Realtek RTL8111H Gigabit LAN controller (10/100/1000 Mb/s) with Wake- LAN, Energy Efficient Ethernet 802.3az, and ESD protection. Lighting is managed through ASRock Polychrome RGB Sync, with two standard RGB headers (12V/3A, up to 36W) and two addressable RGB headers (5V/3A, up to 15W). Fan control covers one 4-pin CPU fan header and three 4-pin chassis/water pump fan headers with smart speed control. Verified Specifications: - Form Factor: Micro-ATX, 9.6 in × 9.6 in (24.4 cm × 24.4 cm) - Chipset: AMD B550 - Socket: AMD AM4 - CPU Support: Ryzen 3000, 4000 G-Series, 5000 Series (excludes Ryzen 5 3400G / Ryzen 3 3200G) - Memory: 4 × DDR4 DIMM, max 128GB, up to DDR4 4733+ (OC) with Renoir APUs - Storage: 1× Hyper M.2 PCIe Gen4 x4, 1× M.2 PCIe Gen3 x2/SATA3, 4× SATA3 6 Gb/s - Expansion: 1× PCIe 4.0 x16, 1× PCIe 3.0 x16 (x4 mode), 1× PCIe 3.0 x1 - Rear USB: 4× USB 3.2 Gen1, 2× USB 2.0 - Display: HDMI 2.1 (4K@60Hz), DisplayPort 1.4 (5K@120Hz) - Audio: Realtek ALC887/897, 7.1-channel HD - LAN: Realtek RTL8111H, 1 Gigabit - BIOS: 256Mb AMI UEFI with Instant Flash - Certifications: FCC, CE, ErP/EuP - Warranty: 3 Years