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Green Micro ATX board with silver heatsinks and rear Wi-Fi antenna ports

ASRock

ASRock B450M/AC R2.0 AMD motherboard

SKU CH-NSPE-VADX7 MPN B450M/AC R2.0

Micro-ATX AM4 board with bundled 802.11ac Wi-Fi, four DDR4 slots up to 128 GB, Ultra M.2 PCIe Gen3 x4 and 7.1-channel audio

  • CPU Socket TypeAM4
  • CPU TypeSupports AMD AM4 Socket Ryzen 2000, 3000 and 5000 Series Des
  • ChipsetAMD Promontory B450
  • Number of Memory Slots4x288pin (DDR4)
  • Memory StandardAMD Ryzen series CPUs (Matisse) support DDR4 3200/ 2933/ 266
  • Maximum Memory Supported128GB ** Due to the operating system limitation, the actual
  • Supports Ryzen 2000, 3000 and 5000 series processors with AM4 socket
  • 10 power phase design delivers stable CPU power for overclocking
  • Four DDR4 slots accept up to 128GB memory at speeds to 3200
  • Ultra M.2 socket provides PCIe Gen3 x4 32Gb/s storage bandwidth
  • Realtek RTL8111H LAN and 802.11ac Wi-Fi give wired and wireless network options

AM4 Micro-ATX Board for Ryzen 2000 3000 5000

This ASRock B450M/AC R2.0 motherboard uses the AMD Promontory B450 chipset and an AM4 socket. It supports Ryzen 2000, 3000 and 5000 Series desktop processors. The Micro-ATX form factor fits smaller cases while providing four DDR4 slots and integrated 802.11ac Wi-Fi.

Check CPU Cooler Clearance and BIOS Version

Verify that your CPU cooler mounting holes match the AM4 layout and that the cooler height suits your case. Ryzen 5000 Series chips may require a BIOS update before first boot; confirm the board ships with a compatible revision or prepare a supported CPU for the update. Ensure your power supply has the 8-pin EPS connector for the 10 power phase design.

Dual Channel DDR4 up to 128GB with Ultra M.2 and RGB

Four 288-pin slots run dual-channel DDR4 up to 3200 MHz and a maximum of 128 GB. One Ultra M.2 socket accepts 2242 2260 2280 drives at PCIe Gen3 x4 speeds. A second M.2 Key E slot holds the bundled Wi-Fi module. Two RGB headers and one addressable RGB header drive strips up to 80 LEDs at 5 V or standard 5050 strips at 12 V. Realtek ALC892/897 provides 7.1 channel audio and RTL8111H handles wired LAN.

Highlights

  • Supports Ryzen 2000, 3000 and 5000 series processors with AM4 socket
  • 10 power phase design delivers stable CPU power for overclocking
  • Four DDR4 slots accept up to 128GB memory at speeds to 3200
  • Ultra M.2 socket provides PCIe Gen3 x4 32Gb/s storage bandwidth
  • Realtek RTL8111H LAN and 802.11ac Wi-Fi give wired and wireless network options

Specifications

BrandASRock
ModelB450M/AC R2.0
CPU Socket TypeAM4
CPU TypeSupports AMD AM4 Socket Ryzen 2000, 3000 and 5000 Series Desktop Processors
ChipsetAMD Promontory B450
Number of Memory Slots4x288pin (DDR4)
Memory StandardAMD 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*
* For Ryzen Series CPUs
Maximum Memory Supported128GB
** 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.
Channel SupportedDual Channel
Memory Performance ProfileIntel XMP 2.0
PCI Express 3.0 x16AMD Ryzen series CPUs (Matisse, Summit Ridge and Pinnacle Ridge)
- 1 x PCI Express 3.0 x16 Slot (PCIE1: x16 mode)*
AMD Ryzen series CPUs (Picasso, Raven Ridge)
- 1 x PCI Express 3.0 x16 Slot (PCIE1: x8 mode)*
AMD Athlon series CPUs
- 1 x PCI Express 3.0 x16 Slot (PCIE1: x4 mode)*
* Supports NVMe SSD as boot disks
PCI Express 2.0 x16AMD Ryzen series CPUs (Summit Ridge and Pinnacle Ridge)
- 1 x PCI Express 2.0 x16 Slot (PCIE2: x4 mode)
AMD Ryzen series CPUs (Raven Ridge)
- 1 x PCI Express 2.0 x16 Slot (PCIE2: x4 mode)
AMD Athlon series CPUs
- 1 x PCI Express 2.0 x16 Slot (PCIE2: x4 mode)
Other Slots1 x Vertical M.2 Socket (Key E) with the bundled WiFi-802.11ac module (on the rear I/O)
Serial ATA (SATA)4 x SATA3 6.0Gb/s Connectors, support RAID, NCQ, AHCI and Hot Plug
M.21 x Ultra M.2 Socket (M2_1), supports M Key type 2242/2260/2280 M.2 PCI Express module up to Gen3 x4 (32Gb/s) (with Matisse, Picasso, Summit Ridge, Raven Ridge and Pinnacle Ridge) or Gen3 x2 (16Gb/s) (with Athlon series APU)*
* Supports NVMe SSD as boot disks
* Supports ASRock U.2 Kit
SATA RAID0/1/10
Onboard Video ChipsetIntegrated 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.**
Supports HDMI 1.4 with max. resolution up to 4K x 2K (4096x2160) @ 24Hz / (3840x2160) @ 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
Audio ChipsetRealtek ALC892/897
Audio Channels7.1 CH HD Audio with Content Protection
Supports Surge Protection
LAN ChipsetRealtek RTL8111H
Max LAN Speed1Gbps
Wireless LANIntel 802.11 ac Wi-Fi Module
Supports IEEE 802.11 a/b/g/n/ac
Supports Dual-Band (2.4/5 GHz)
Supports high speed wireless connections up to 433 Mbps
BluetoothBluetooth 4.2 / 3.0 + High speed class II
Back I/O Ports2 x Antenna Ports
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
Onboard USB2 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)
Other Connectors1 x Chassis Intrusion Header
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 Front Panel Audio Connector
1 x AMD LED Fan USB Header
*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 m
Form FactorMicro ATX
LED LightingNone RGB
Dimensions (W x L)9.6" x 9.6"
Power Pin1 x 24-pin ATX Power Connector
1 x 8-pin 12V Power Connector
Windows 11Supported
FeaturesUnique Feature:
ASRock Super Alloy
- 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
BIOS:
- 128MB AMI UEFI Legal BIOS with multilingual GUI support
- Supports "Plug and Play"
- ACPI 5.1 compliance wake up events
- Supports jumperfree
- SMBIOS 2.3 support
- DRAM Voltage multi-adjustment
Software and UEFI:
Software
- ASRock A-Tuning
- ASRock Polychrome SYNC
- ASRock XFast LAN
UEFI
- ASRock Full HD U
Package ContentsAccessories:
- Quick Installation Guide, Support CD, I/O Shield
- 2 x SATA Data Cables
- 2 x ASRock Wi-Fi 2.4/5 GHz Antennas
- 1 x Screw for M.2 Socket
Shipping weight1.18 kg
Package size275 × 260 × 60 mm

Questions about this item

What comes in the box and is the Wi-Fi module already installed?

The board includes a WiFi 802.11ac module that fits into the vertical M.2 Key E socket on the rear I/O, so wireless networking works immediately.

Which M.2 drive sizes does the Ultra M.2 slot accept?

The Ultra M.2 socket supports M Key modules in 2242, 2260 and 2280 form factors.

What does the 32Gb/s Ultra M.2 rating mean with a Ryzen 5000 series CPU?

With a Matisse processor the slot runs at PCIe 3.0 x4, delivering up to 32Gb/s bandwidth to the installed M.2 drive.

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