ASRock B450M/AC MB B450 Micro-ATX: AM4 Socket For AMD Ryzen Processors Ultra M.2, 4x DDR4, 4x SATA 6Gbps, 1x Gigabit LAN, Intel 802.11ac +BT4.2, 1 PCIe 3.0 x16, 1 PCIe 2.0 x16, USB 3.2, HDMI, Audio 7.1

– Premium 42A Power Choke

– Sapphire Black PCB

– High Density Glass Fabric PCB

– 2oz Copper PCB

Intel 802.11ac WiFi

ASRock Ultra M.2 (PCIe Gen3 x4)

ASRock Full Spike Protection (for all USB, Audio, LAN Ports)

ASRock Live Update & APP Shop

– Digi Power design

– 9 Power Phase design

– 4 x DDR4 DIMM Slots

– AMD Ryzen series CPUs (Matisse) support DDR4 3200 / 2933 / 2667 / 2400 / 2133 ECC & non-ECC, un-buffered memory*

– AMD Ryzen series CPUs (Pinnacle Ridge) support DDR4 3200+(OC) / 2933(OC) / 2667 / 2400 / 2133 ECC & non-ECC, un-buffered memory*

– AMD Ryzen series CPUs (Picasso) support DDR4 2933 / 2667 / 2400 / 2133 non-ECC, un-buffered memory*

– AMD Ryzen series CPUs (Summit Ridge) support DDR4 3200+(OC) / 2933(OC) / 2667 / 2400 / 2133 ECC & non-ECC, un-buffered memory*

– AMD Ryzen series CPUs (Raven Ridge) support DDR4 3200+(OC) / 2933 / 2667 / 2400 / 2133 non-ECC, un-buffered memory*

– Max. capacity of system memory: 64GB**

– Supports Extreme Memory Profile (XMP) memory modules

– 15μ Gold Contact in DIMM Slots

*For Ryzen Series CPUs (Picasso and Raven Ridge), ECC is only supported with PRO CPUs.

Please refer to below table for AMD non-XMP memory frequency support.

Ryzen Series CPUs (Matisse):

Ryzen Series CPUs (Pinnacle Ridge):

Ryzen Series CPUs (Picasso):

Ryzen Series CPUs (Summit Ridge):

Ryzen Series CPUs (Raven Ridge):

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.

– Supports “Plug and Play”

– ACPI 5.1 compliance wake up events

– Supports jumperfree

– SMBIOS 2.3 support

– DRAM Voltage multi-adjustment

– DirectX 12, Pixel Shader 5.0

– Shared memory default 2GB. Max Shared memory supports up to 16GB.**

– Supports HDMI 1.4 with max. resolution up to 4K x 2K (4096×2160) @ 24Hz / (3840×2160) @ 30Hz

– Supports Auto Lip Sync, Deep Color (12bpc), xvYCC and HBR (High Bit Rate Audio) with HDMI 1.4 Port (Compliant HDMI monitor is required)

– Supports HDCP 1.4 with HDMI 1.4 Port

– Supports 4K Ultra HD (UHD) playback with HDMI 1.4 Port

*Actual support may vary by CPU

**The Max shared memory 16GB requires 32GB system memory installed.

– Premium Blu-ray Audio support

– Supports Surge Protection

– ELNA Audio Caps

– Realtek RTL8111H

– Supports Wake-On-LAN

– Supports Lightning/ESD Protection

– Supports Energy Efficient Ethernet 802.3az

– Supports PXE

– 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 / 3.0 + High speed class II

– 1 x PCI Express 3.0 x16 Slot (PCIE1: x16 mode)*

– 1 x PCI Express 2.0 x16 Slot (PCIE2: x4 mode)

AMD Ryzen series CPUs (Picasso, Raven Ridge)

– 1 x PCI Express 3.0 x16 Slot (PCIE1: x8 mode)*

– 1 x PCI Express 2.0 x16 Slot (PCIE2: x4 mode)

AMD Athlon series CPUs

– 1 x PCI Express 3.0 x16 Slot (PCIE1: x4 mode)*

– 1 x PCI Express 2.0 x16 Slot (PCIE2: x4 mode)

– Supports AMD Quad CrossFireX and CrossFireX

– 1 x Vertical M.2 Socket (Key E) with the bundled WiFi-802.11ac module (on the rear I/O)

*Supports NVMe SSD as boot disks

– 1 x Ultra M.2 Socket (M2_1), supports M Key type 2242/2260/2280 M.2 PCI Express module up to Gen3 x4 (32 Gb/s) (with Matisse, Picasso, Summit Ridge, Raven Ridge and Pinnacle Ridge) or Gen3 x2 (16 Gb/s) (with Athlon series APU)*

*Supports NVMe SSD as boot disks

Supports ASRock U.2 Kit

– 1 x Power LED and Speaker Header

– 1 x RGB LED Header*

– 1 x Addressable LED Header**

– 1 x AMD Fan LED Header***

– 1 x CPU Fan Connector (4-pin)****

– 1 x Chassis Fan Connector (3-pin)*****

– 1 x Chassis/Water Pump Fan Connector (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 AMD LED Fan USB Header

– 2 x USB 2.0 Headers (Support 4 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 AMD Fan LED Header supports LED strips of maximum load of 3A (36W) and length up to 2.5M.

****The CPU Fan Connector supports the CPU fan of maximum 1A (12W) fan power.

*****The Chassis Fan Connector supports the chassis 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 can auto detect if 3-pin or 4-pin fan is in use.

– 1 x HDMI Port

– 2 x USB 2.0 Ports (Supports ESD Protection)

– 4 x USB 3.2 Gen1 Ports (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

– ASRock A-Tuning

– ASRock Polychrome SYNC

– ASRock XFast LAN

– ASRock Full HD UEFI ASRock Instant Flash

– ASRock Easy RAID Installer

– 2 x SATA Data Cables

– 2 x ASRock WiFi 2.4/5 GHz Antennas

– 1 x Screw for M.2 Socket

– Fan Tachometer: CPU, Chassis, Chassis/Water Pump Fans

– Quiet Fan (Auto adjust chassis fan speed by CPU temperature): CPU, Chassis, Chassis/Water Pump Fans

– Fan Multi-Speed Control: CPU, Chassis, Chassis/Water Pump Fans

– CASE OPEN detection

– Voltage monitoring: +12V, +5V, +3.3V, Vcore

– 2oz Copper PCB

– Solid Capacitor design

– ErP/EuP ready (ErP/EuP ready power supply is required)