ASRock B550M-ITX/AC AM4 Mini-ITX Motherboard (AMD Socket AM4/3rd Gen Ryzen Series CPU/Max 64GB DDR4 4733MHz Memory)

B550M-ITX/ac

• Supports AMD AM4 Socket Ryzen™ 3000, 4000 G-Series and 5000 Series Desktop Processors*
• Supports DDR4 4733+ (OC)
• 1 PCIe 4.0 x16
• Graphics Output: DisplayPort, HDMI
• 7.1 CH HD Audio (Realtek ALC887 Audio Codec)
• 4 SATA3, 1 Hyper M.2 (PCIe Gen4 x4 & SATA3)
• 6 USB 3.2 Gen1 (2 Front, 3 Rear Type-A, 1 Rear Type-C)
• Realtek Gigabit LAN
• Intel^® 802.11ac WiFi + BT 4.2

Unique Feature	ASRock Super Alloy
	– Premium 60A Power Choke
	– 50A Dr.MOS
	– Sapphire Black PCB
	– High Density Glass Fabric PCB
	Intel® 802.11ac WiFi
	ASRock Full Coverage M.2 Heatsink
	ASRock Hyper M.2 (PCIe Gen4x4)
	ASRock Full Spike Protection (for all USB, Audio, LAN Ports)
	ASRock Live Update & APP Shop
CPU	– Supports 3rd Gen AMD AM4 Ryzen™ / future AMD Ryzen™ Processors*
	– Digi Power design
	– 8 Power Phase design
	*Not compatible with AMD Ryzen™ 5 3400G and Ryzen™ 3 3200G.
Chipset	– AMD B550
Memory	– 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 & non-ECC, un-buffered memory*
	– AMD Ryzen series APUs (Renoir) 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 & non-ECC, un-buffered memory*
	– Max. capacity of system memory: 64GB**
	– Supports Extreme Memory Profile (XMP) memory modules
	– 15μ Gold Contact in DIMM Slots
	*Ryzen Series CPUs (Matisse):
	Ryzen Series APUs (Renoir):
	SR: Single rank DIMM, 1Rx4 or 1Rx8 on DIMM module label
	DR: Dual rank DIMM, 2Rx4 or 2Rx8 on DIMM module label
	**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-adjustment
Graphics	– Integrated AMD Radeon™ Vega Series Graphics in Ryzen Series APU*
	– DirectX 12, Pixel Shader 5.0
	– Shared memory default 2GB. Max Shared memory supports up to 16GB.**
	– 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 (4096×2160) @ 60Hz
	– Supports DisplayPort 1.4 Input with max. resolution up to 5K (5120×2880)@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® PlayReady
	*Actual support may vary by CPU
	**The Max shared memory 16GB requires 32GB system memory installed.
Audio	– 7.1 CH HD Audio (Realtek ALC887 Audio Codec)
	– Supports Surge Protection
LAN	– 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 PXE
Wireless 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 II
Slots	AMD Ryzen series CPUs (Matisse)
	– 1 x PCI Express 4.0 x16 Slot (PCIE1: x16 mode)*
	AMD Ryzen series APUs (Renoir)
	– 1 x PCI Express 3.0 x16 Slot (PCIE1: x16 mode)*
	– 1 x Vertical M.2 Socket (Key E) with the bundled WiFi-802.11ac module (on the rear I/O)
	*Supports PCIe riser cards to extend x8/x8 slots
	Supports NVMe SSD as boot disks
Storage	– 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) (with Renoir)**
	*Supports NVMe SSD as boot disks
	Supports ASRock U.2 Kit
Connector	– 1 x RGB LED Header*
	– 1 x Addressable LED Header**
	– 1 x CPU Fan Connector (4-pin)***
	– 2 x Chassis/Water Pump Fan Connectors (4-pin) (Smart Fan Speed Control)****
	– 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)
	*Supports in total up to 12V/3A, 36W LED Strip
	**Supports in total up to 5V/3A, 15W LED Strip
	***The CPU Fan Connector supports the CPU fan of maximum 1A (12W) fan power.
	****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 / Microphone
Software and UEFI	Software
	– ASRock Motherboard Utility (A-Tuning)
	– ASRock Polychrome SYNC
	– ASRock XFast LAN
	UEFI
	– ASRock Full HD UEFI
	– ASRock Instant Flash
	*These utilities can be downloaded from ASRock Live Update & APP Shop.
	Support CD
	– Drivers, Utilities, AntiVirus Software (Trial Version), Google Chrome Browser and Toolbar
Accessories	– Quick Installation Guide, Support CD, I/O Shield
	– 2 x SATA Data Cables
	– 2 x ASRock WiFi 2.4/5 GHz Antennas
	Hardware 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 Vcore
Form Factor	– Mini-ITX Form Factor: 6.7-in x 6.7-in, 17.0 cm x 17.0 cm
	– Solid Capacitor design
OS	– Microsoft® Windows® 10 64-bit
Certifications	– FCC, CE
	– ErP/EuP ready (ErP/EuP ready power supply is required)