PLEASE NOTE:5th gen Ryzen CPUs will require a BIOS update to workAMD B450 (Ryzen AM4) micro ATX motherboard with M.2 support, HDMI/DVI-D/D-Sub, SATA 6 Gbps, 1 Gb Ethernet, USB 3.2 Gen 1 Type-A, BIOS FlashBack™ Comprehensive cooling: PCH heatsink and Fan XpertUltrafast connectivity: M.2 support, 1 Gb Ethernet, and USB 3.2 Gen 1 Type-A5X Protection III: Multiple hardware safeguards for all-around system protectionLED illumination: Lighting control for both PCIe slot and audio trace paths PrimeASUS Prime B450M II Series motherboards provide the solid foundation needed for your first build, plus flexibility to grow with your ambitions. We've melded all the good stuff that's packed into AMD Ryzen™ processors with essential ASUS design and engineering, so you benefit from industry-leading technologies — including automated system tuning, comprehensive cooling controls, and immersive onboard audio. When you build with an ASUS Prime B450M II Series motherboard, you build smart, easy and affordably. Tune It Your WayComprehensive controls form the foundation of the ASUS Prime series. The Prime B450M II motherboard packs flexible tools to tune every aspect of your system, enabling you to tweak performance settings to perfectly match the way you work – maximizing your productivity.Cooler by DesignPRIME B450M-K II is engineered with an array of hybrid fan headers and features comprehensive cooling controls that are configurable via Fan Xpert software or via the UEFI BIOS, ensuring your rig stays cool and stable under intense workloads.Build on a Solid FoundationPrime B450M II motherboard provides all the fundamentals to boost daily productivity, so your system will be ready for action with stable power, intuitive cooling and flexible transfer options. Achieve speed with onboard M.2M.2 Slot supports data-transfer speed up to 32Gbps via x4 PCI Express 3.0 bandwidth. It‘ s the perfect choice for an operating system or application drive, providing fast access to data.USB 3.2 Gen 1 Type-ANumerous USB ports support high-end rigs loaded with peripherals, including four rear-panel USB Type-A connectors with fast USB 3.2 Gen 1 connectivity for compatible cases.Outstanding AudioCombined onboard features deliver elevated audioIntelligent design and premium hardware create audio quality unlike anything you've ever experienced. Audio ShieldingSeparates analog/digital signal domains, significantly reducing multi-lateral interference. Separate Layer for Left and Right TracksEnsures minimal crosstalk between audio paths. Premium Japanese CapacitorsPremium parts provide an immersive sound signature, with exceptional fidelity. BIOS FLASHBACK™BIOS FlashBack™ is the simplest and safest (UEFI) BIOS update method. Simply drop the (UEFI) BIOS file onto a FAT32 formatted USB stick, plug it into the USB BIOS FlashBack™ port and press the button. Updates can even be performed without having memory or a CPU installed.SafeSlot CoreFortified PCIe slot prevents damageSafeSlot Core is the ASUS-exclusive PCIe slot. Featuring a fortified design that's anchored to the motherboard by a special hook, SafeSlot Core provides 1.6x stronger retention and 1.3x greater shearing resistance than standard expansion slots. Overvoltage ProtectionWorld-class circuit-protecting power designAn exclusive circuit design with built-in voltage regulators to protect your motherboard from damage caused by unexpected high-level voltages from unstable or inferior power supplies. DRAM Overcurrent ProtectionShort-circuit damage preventionOnboard resettable fuses prevent overcurrent and short-circuit damage. This extends beyond I/O ports to DRAM to safeguard the lifespan of your system and connected devices. Stainless-Steel Back I/O3X corrosion-resistance for greater durabilityCorrosion-resistant stainless-steel back I/O panels bonded with chromium oxide have a lifespan that's three times longer than ordinary panels. LANGuardPumped-up throughput 2.5X higher surge toleranceASUS LANGuard is a hardware-level network protection feature that integrates advanced signal-coupling technology and premium anti-EMI surface-mounted capacitors to improve throughput and ensure a more reliable connection. Motherboard TypeDesktopForm FactorMicro ATXSocketAMD AM4ChipsetAMD B450 RAM TechnologyDDR4 (Dual Channel)RAM Slots2 x DIMMRAM Speeds4400(O.C)/4000(O.C.)/3866(O.C.)/3733(O.C.)/3600(O.C.)/3466(O.C.)/3400(O.C.)/3300(O.C.)/3200(O.C.)/3000(O.C.)/2933(O.C.)/2800(O.C.)/2666/2400/2133 MHzMaximum Memory64GBGraphicsIntegrated Graphics Processor*Graphics specifications may vary between CPU typesGraphics Ports1 x VGA1 x DVI-D1 x HDMIMulti-GPU Support-PCI/PCI Express1 x PCIe 3.0 x162 x PCIe 2.0 x1Storage4 x SATA III1 x M.2 (2242/2260/2280) - SATA & PCIe**PCIe mode not supported with Athlon CPUsRAIDRAID 0, 1, 10Wireless-LANGB LANAudioRealtek ALC887/897 7.1-Channel High Definition Audio CODECUSB Ports Supported6 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 Ports1 x PS/2 keyboard/mouse1 x DVI-D1 x D-Sub1 x HDMI1 x LAN (RJ45)4 x USB 3.2 Gen1 Type-A2 x USB 2.03 x Audio jacks1 x BIOS FlashBack ButtonInternal I/O Connectors1 x CPU Fan1 x Chassis Fan1 x USB 3.2 Gen12 x USB 2.01 x M.2 Socket 3 with M key1 x SPI TPM1 x COM port4 x SATA 6Gb/s1 x S/PDIF out1 x 24-pin EATX1 x 8-pin ATX 12V1 x Front audio1 x System panel1 x Clear CMOS jumper1 x COM port header1 x SpeakerAccessoriesUsers manualI/O Shield2 x SATA 6Gb/s cables1 x M.2 Anchor1 x Supporting DVD