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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

  • ProcessorSupports AMD AM4 Socket Ryzen 2000, 3000 and 5000 Series Des
  • ChipsetAMD Promontory B450
  • Form factorMicro ATX
  • CPU socketAM4
  • Memory slot count4 × 288pin (DDR4)
  • Supported memoryAMD Ryzen series CPUs (Matisse) support DDR4 3200/ 2933/ 266
  • 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.

How it compares

Measured against everything we stock in Motherboards for AMD CPUs, at today’s prices. Recalculated every night.

Price $67.99
Cheaper than about 86% of the 1,906 comparable items (median $224.49).

New to this? Buying PC parts with Monero — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameASRock
Model nameB450M/AC R2.0
Processor
ProcessorSupports AMD AM4 Socket Ryzen 2000, 3000 and 5000 Series Desktop Processors
CPU socketAM4
ChipsetAMD Promontory B450
Memory
Memory slot count4 × 288pin (DDR4)
Supported memoryAMD 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
Memory channelsDual Channel
Memory profilesIntel XMP 2.0
Storage
SATA ports4 x SATA3 6.0Gb/s Connectors, support RAID, NCQ, AHCI and Hot Plug
M.2 slots1 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 and RAID support0/1/10
Audio & video
Audio chipRealtek ALC892/897
Sound channels7.1 CH HD Audio with Content Protection
Supports Surge Protection
Connectivity
Ethernet controllerRealtek RTL8111H
Maximum network speed1 Gbit/s
Wi-Fi standardIntel 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 Mbit/s
Bluetooth support4.2 / 3.0 + High speed class II
Ports & slots
Additional slots1 x Vertical M.2 Socket (Key E) with the bundled WiFi-802.11ac module (on the rear I/O)
Rear panel 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 USB headers2 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)
Power
Power connectors1 × 24-pin ATX Power Connector
1 × 8-pin 12 V Power Connector
Size & build
Form factorMicro ATX
Width and length9.6 in × 9.6 in
Shipping weight1.18 kg
Package size275 × 260 × 60 mm
Compatibility
Windows 11 supportSupported
In the box
In the boxAccessories:
- 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
More details
LightingNone RGB

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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