ASRock Motherboard B550M-ITX/AC AMD AM4 Ryzen B550 Max 64GB DDR4 Mini-ITX Retail
MPNB550M-ITX/ACUnique FeatureASRock Super Alloy- Premium 60A Power Choke- 50A Dr.MOS- Sapphire Black PCB- High Density Glass Fabric PCBIntel 802.11ac WiFiASRock Full Coverage M.2 HeatsinkASRock Hyper M.2 (PCIe Gen4x4) ASRock Full Spike Protection (for all USB, Audio, LAN Ports) ASRock Live Update and APP ShopCPU- Supports 3rd Gen AMD AM4 RyzenTM / future AMD RyzenTM Processorsnote1- Digi Power design- 8 Power Phase designNote1: Not compatible with AMD RyzenTM 5 3400G and RyzenTM 3 3200G.Chipset- AMD B550Memory- Dual Channel DDR4 Memory Technology- 2 x DDR4 DIMM Slots- AMD Ryzen series CPUs (Matisse) support DDR4 4600+(OC) / 4533(OC) / 4466(OC) / 4400(OC) / 4333(OC) / 4333(OC) / 4266(OC) / 4200(OC) / 4133(OC) / 4000(OC) / 3866(OC) / 3800(OC) / 3733(OC) / 3600(OC) / 3466(OC) / 3200 / 2933 / 2667 / 2400 / 2133 ECC and non-ECC, un-buffered memory- AMD Ryzen series APUs support DDR4 4733+(OC) / 4666(OC) / 4600(OC) / 4533(OC) / 4466(OC) / 4400(OC) / 4333(OC) / 4266(OC) / 4200(OC) / 4133(OC) / 4000(OC) / 3866(OC) / 3800(OC) / 3733(OC) / 3600(OC) / 3466(OC) / 3200 / 2933 / 2667 / 2400 / 2133 ECC and non-ECC, un-buffered memory- Max. capacity of system memory: 64GBnote2- Supports Extreme Memory Profile (XMP) memory modules- 15Mu Gold Contact in DIMM SlotsSR: Single rank DIMM, 1Rx4 or 1Rx8 on DIMM module labelDR: Dual rank DIMM, 2Rx4 or 2Rx8 on DIMM module labelNote2: Due to the operating system limitation, the actual memory size may be less than 4GB for the reservation for system usage under Windows 32-bit OS. For Windows 64-bit OS with 64-bit CPU, there is no such limitation.BIOS- 256Mb AMI UEFI Legal BIOS with GUI support- Supports "Plug and Play"- ACPI 5.1 compliance wake up events- Supports jumperfree- SMBIOS 2.3 support- CPU, CPU VDDCR_SOC, DRAM, VPPM, +1.8VSB, VDDP Voltage Multi-adjustmentGraphics- Integrated AMD RadeonTM Vega Series Graphics in Ryzen Series APUnote1- DirectX 12, Pixel Shader 5.0- Shared memory default 2GB. Max Shared memory supports up to 16GB.note2- Dual graphics output: support HDMI and DisplayPort 1.4 ports by independent display controllers- Supports HDMI 2.1 with max. resolution up to 4K x 2K (4096x2160) at 60Hz- Supports DisplayPort 1.4 Input with max. resolution up to 5K (5120x2880) at 120Hz- Supports Auto Lip Sync, Deep Color (12bpc), xvYCC and HBR (High Bit Rate Audio) with HDMI 2.1 Port (Compliant HDMI monitor is required) - Supports HDR (High Dynamic Range) with HDMI 2.1- Supports HDCP 2.3 with HDMI 2.1 and DisplayPort 1.4 Ports- Supports 4K Ultra HD (UHD) playback with HDMI 2.1 and DisplayPort 1.4 Ports- Supports Microsoft PlayReadyNote1: Actual support may vary by CPUNote2: The Max shared memory 16GB requires 32GB system memory installed.Audio- 7.1 CH HD Audio (Realtek ALC887 Audio Codec) - Supports Surge ProtectionLAN- PCIE x1 Gigabit LAN 10/100/1000 Mb/s - Realtek RTL8111H- Supports Wake-On-LAN- Supports Lightning/ESD Protection- Supports Energy Efficient Ethernet 802.3az- Supports PXEWireless LAN- Intel 802.11ac WiFi Module- Supports IEEE 802.11a/b/g/n/ac- Supports Dual-Band (2.4/5 GHz) - Supports high speed wireless connections up to 433Mbps- Supports Bluetooth 4.2 + High speed class IISlotsAMD Ryzen series CPUs (Matisse) - 1 x PCI Express 4.0 x16 Slot (PCIE1: x16 mode)note1AMD Ryzen series APUs- 1 x PCI Express 3.0 x16 Slot (PCIE1: x16 mode)note1- 1 x Vertical M.2 Socket (Key E) with the bundled WiFi-802.11ac module (on the rear I/O) Note1: Supports PCIe riser cards to extend x8/x8 slotsSupports NVMe SSD as boot disksStorage- 4 x SATA3 6.0 Gb/s Connectors, support RAID (RAID 0, RAID 1 and RAID 10), NCQ, AHCI and Hot Plug- 1 x Hyper M.2 Socket (M2_1), supports M Key type 2280 M.2 SATA3 6.0 Gb/s module and M.2 PCI Express module up to Gen4x4 (64 Gb/s) (with Matisse) or Gen3x4 (32 Gb/s)note2Note1: Supports NVMe SSD as boot disksSupports ASRock U.2 KitConnector- 1 x RGB LED Headernote1- 1 x Addressable LED Headernote2- 1 x CPU Fan Connector (4-pin)note3- 2 x Chassis/Water Pump Fan Connectors (4-pin) (Smart Fan Speed Control)note4- 1 x 24 pin ATX Power Connector- 1 x 8 pin 12V Power Connector- 1 x Front Panel Audio Connector- 1 x USB 2.0 Header (Supports 2 USB 2.0 ports) (Supports ESD Protection) - 1 x USB 3.2 Gen1 Header (Supports 2 USB 3.2 Gen1 ports) (Supports ESD Protection) Note1: Supports in total up to 12V/3A, 36W LED StripNote2: Supports in total up to 5V/3A, 15W LED StripNote3: The CPU Fan Connector supports the CPU fan of maximum 1A (12W) fan power. Note4: The Chassis/Water Pump Fan supports the water cooler fan of maximum 2A (24W) fan power. CHA_FAN1/WP and CHA_FAN2/WP can auto detect if 3-pin or 4-pin fan is in use.Rear Panel I/O- 2 x Antenna Ports- 1 x PS/2 Mouse/Keyboard Port- 1 x HDMI Port- 1 x DisplayPort 1.4- 2 x USB 2.0 Ports (Supports ESD Protection) - 3 x USB 3.2 Gen1 Type-A Ports (Supports ESD Protection) - 1 x USB 3.2 Gen1 Type-C Port (Supports ESD Protection) - 1 x RJ-45 LAN Port with LED (ACT/LINK LED and SPEED LED) - HD Audio Jacks: Line in / Front Speaker / MicrophoneSoftware and UEFISoftware- ASRock Motherboard Utility (A-Tuning) - ASRock Polychrome SYNC- ASRock XFast LANUEFI- ASRock Full HD UEFI- ASRock Instant FlashNote: These utilities can be downloaded from ASRock Live Update and APP Shop.Support CD- Drivers, Utilities, AntiVirus Software (Trial Version), Google Chrome Browser and ToolbarAccessories- Quick Installation Guide, Support CD, I/O Shield- 2 x SATA Data Cables- 2 x ASRock WiFi 2.4/5 GHz AntennasHardware Monitor- Temperature Sensing: CPU, Chassis/Water Pump Fans- Fan Tachometer: CPU, Chassis/Water Pump Fans- Quiet Fan (Auto adjust chassis fan speed by CPU temperature): CPU, Chassis/Water Pump Fans- Fan Multi-Speed Control: CPU, Chassis/Water Pump Fans- Voltage monitoring: +12V, +5V, +3.3V, CPU VcoreForm Factor- Mini-ITX Form Factor: 6.7-in x 6.7-in, 17.0 cm x 17.0 cm- Solid Capacitor designOS- Microsoft Windows 10 64-bitCertifications- FCC, CE- ErP/EuP ready (ErP/EuP ready power supply is required)