ASUS Prime B450M-A II DDR4 AMD Motherboard

The ASUS Prime B450M-A II is a Micro-ATX motherboard built on the AMD B450 chipset, designed for the AM4 socket. It supports 1st, 2nd, and 3rd Generation AMD Ryzen processors, as well as 1st and 2nd Generation AMD Ryzen processors with Radeon Vega Graphics and AMD Athlon processors with Radeon Vega Graphics. This makes it a versatile platform for a wide range of AMD-powered desktop builds. For memory, the board provides four DIMM slots supporting up to 128GB of unbuffered DDR4 RAM in dual-channel configuration. Native speeds of 2133, 2400, and 2666 MHz are supported, with overclocked profiles reaching up to DDR4-4400 (O.C.) depending on the processor installed. Storage options include one M.2 Socket 3 (M-key) slot accommodating devices in 2242, 2260, 2280, and 22110 form factors. When used with Ryzen processors, the M.2 slot supports both SATA and PCIe 3.0 x4 modes. Six SATA 6Gb/s ports are also available, with RAID 0, 1, and 10 support. Note that the M.2 slot shares bandwidth with SATA ports 5 and 6, so those ports are disabled when an M.2 device is installed. Connectivity is handled by a Realtek RTL8111H Gigabit Ethernet controller with ASUS LANGuard protection. USB ports on the rear I/O include two USB 3.2 Gen 2 Type-A (up to 10Gbps) and four USB 3.2 Gen 1 Type-A ports, plus a PS/2 combo port. Display outputs on the rear panel consist of one D-Sub, one DVI-D, and one HDMI 2.0b port, serving APU-based systems with integrated Radeon Vega Graphics. Audio is delivered by a Realtek ALC887/897 codec offering 7.1-channel HD audio with up to 24-bit/192kHz playback. The audio section features dedicated PCB layers, audio shielding, LED-illuminated design, and premium Japanese capacitors. The board carries ASUS 5X Protection III, covering DIGI+ VRM digital power control, LANGuard, overvoltage protection, SafeSlot Core reinforced PCIe slot, and a stainless-steel back I/O panel. A BIOS FlashBack button enables CPU-free BIOS updates. Thermal management is supported by a VRM heatsink, PCH heatsink, and Fan Xpert 2+ fan control software. Aura Sync RGB lighting is supported via one onboard RGB header, compatible with the Armoury Crate software ecosystem. The BIOS is a 256Mb Flash ROM UEFI AMI implementation with EZ Mode, CrashFree BIOS 3, and EZ Flash 3. Verified Specifications: - Form Factor: Micro-ATX, 9.6 x 9.5 inches (24.4 x 24.0 cm) - Socket / Chipset: AMD AM4 / AMD B450 - Memory: 4x DIMM, max 128GB, DDR4-2133 to DDR4-4400 (O.C.), dual-channel, unbuffered - Storage: 1x M.2 (PCIe 3.0 x4 / SATA, 2242–22110) + 6x SATA 6Gb/s (RAID 0/1/10) - Expansion: 1x PCIe 3.0 x16 + 2x PCIe 2.0 x1 - Rear USB: 2x USB 3.2 Gen 2 Type-A + 4x USB 3.2 Gen 1 Type-A - Display Out: 1x D-Sub, 1x DVI-D, 1x HDMI 2.0b - LAN: Realtek RTL8111H Gigabit Ethernet - Audio: Realtek ALC887/897, 7.1-channel HD, 24-bit/192kHz - BIOS: 256Mb Flash ROM, UEFI AMI - Warranty: 3 Years