ASRock B450M Pro4 R2.0 AMD AM4 Motherboard

The ASRock B450M Pro4 R2.0 delivers reliable performance for AMD Ryzen builds in a compact Micro-ATX form factor. Built on the AMD B450 chipset, this motherboard supports AMD AM4 Socket Ryzen processors including 2000, 3000, 4000 G-Series, 5000, and 5000 G-Series desktop processors, making it compatible with multiple generations of AMD CPUs.

10-Phase Power Delivery System

Equipped with a 10-phase power design and premium 42A power chokes, this motherboard provides stable power delivery to the CPU for consistent performance. The Super Alloy construction includes 2oz copper PCB layers, high-density glass fabric PCB, and sapphire black PCB for enhanced durability and thermal efficiency during extended use.

Memory and Storage Configuration

Four DDR4 DIMM slots support up to 128GB of dual-channel memory at speeds up to DDR4-3200, with support for both ECC and non-ECC unbuffered memory modules. Storage options include four SATA3 6.0 Gb/s connectors with RAID support, plus dual M.2 sockets—one Ultra M.2 slot supporting PCIe Gen3 x4 speeds up to 32Gb/s, and a second M.2 slot for SATA3 6Gb/s SSDs.

Expansion and Connectivity

The expansion layout includes one PCIe 3.0 x16 slot, one PCIe 2.0 x16 slot (x4 mode), and one PCIe 2.0 x1 slot, with support for AMD Quad CrossFireX multi-GPU configurations. Rear I/O features dual USB 3.2 Gen2 ports (Type-A and Type-C) delivering 10 Gb/s transfer speeds, four additional USB 3.2 Gen1 ports, and two USB 2.0 ports. Realtek Gigabit LAN provides reliable network connectivity with Energy Efficient Ethernet 802.3az support.

Integrated Graphics and Audio

Three display outputs—D-Sub, DVI-D, and HDMI 1.4—enable triple monitor support when using AMD Ryzen APUs with integrated Radeon Vega graphics. The HDMI port supports 4K resolution at 30Hz with HDCP 1.4 protection. Realtek ALC892/897 audio codec delivers 7.1-channel HD audio output.

Polychrome RGB Lighting

Onboard RGB headers and an addressable RGB header allow connection of compatible LED strips, fans, and coolers. Polychrome RGB Sync enables synchronized lighting effects across compatible accessories for customized system aesthetics.

Advanced Features

Smart fan control manages up to five fan connectors including CPU, CPU/water pump, and three chassis/water pump fan headers with 4-pin PWM support. Full Spike Protection safeguards all USB, audio, and LAN ports. The 128Mb AMI UEFI BIOS includes ASRock's Full HD interface, Instant Flash, and Easy RAID Installer utilities.

Supports AMD AM4 Socket Ryzen 2000, 3000, 4000 G-Series, 5000 and 5000 G-Series Desktop Processors
Supports DDR4 3200
1 PCIe 3.0 x16, 1 PCIe 2.0 x16, 1 PCIe 2.0 x1
AMD Quad CrossFireX
Graphics Output:HDMI, DVI-D, D-Sub
7.1 CH HD Audio (Realtek ALC892/897 Audio Codec)
4 SATA3, 1 Ultra M.2 (PCIe Gen3 x4), 1 M.2 (SATA3)
2 USB 3.2 Gen2 (Rear Type-A+C)
6 USB 3.2 Gen1 (2 Front, 4 Rear)
Realtek Gigabit LAN

10 POWER PHASE DESIGN
Featuring sturdy components and completely smooth power delivery to the CPU. Plus, it offers unmatched overclocking capabilities and enhanced performance with the lowest temperature for advanced gamers as well.

RULE YOUR OWN LIGHTING WAY - POLYCHROME RGB
This motherboard features onboard RGB headers and an addressable RGB header that allow motherboard to be connected to compatible LED devices such as strip, CPU fans, coolers, chassis and so on. Users may also synchronize RGB LED devices across the Polychrome RGB Sync-certified accessories to create their own unique lighting effects.

Dual M.2 For SSD
Two of the world's fastest M.2 slots. One delivers up to PCIe Gen3 x4 32Gb/s transfer speed, the other one supports SATA3 6Gb/s mode.

Dual USB 3.2 Gen2 (Type-A + Type-C)
This motherboard has a pair of onboard Type-A and Type-C USB 3.2 Gen2 ports built on the rear i/o for supporting next generation USB 3.2 Gen2 devices and to deliver up to 10 Gbps data transfer rates.

2oz Copper
It comes with 2 ounces copper inner layers, using only carefully selected copper materials for PCB layers, delivering lower temperature and higher energy efficiency for overclocking.

AMD StoreMI Technology
A powerful tool that combines the speed of your SSD with the capacity of your hard disk into a single, fast, easy-to-manage drive, AMD StoreMI technology "combines" these two types of storage into a single drive and automatically moves the data you access the most to the SSD, so you get the best of both worlds.

Premium 42A Power Choke
Compared to traditional chokes, ASRock's premium 42A power chokes effectively make the saturation current up to three times better, thus providing enhanced and improved Vcore voltage to the motherboard.

Sapphire Black PCB
Pure black PCB appearance. The new Sapphire Black PCB represents rock-solid quality and gives the motherboard a more mysterious touch.

High Density Glass Fabric PCB
High Density Glass Fabric PCB design that reduces the gaps between the PCB layers to protect the motherboard against electrical shorts caused by humidity.

2oz Copper PCB
Using only carefully selected copper materials for PCB layers, 2oz Copper PCB delivers lower temperature and higher energy efficiency for overclocking.

Specification

Unique Feature
ASRock USB 3.2 Gen2
- ASRock USB 3.2 Gen2 Type-A Port (10 Gb/s)
- ASRock USB 3.2 Gen2 Type-C Port (10 Gb/s)
ASRock Super Alloy
- Premium 42A Power Choke
- Sapphire Black PCB
- High Density Glass Fabric PCB
- 2oz Copper PCB
ASRock Ultra M.2 (PCIe Gen3 x4)
ASRock Full Spike Protection (for all USB, Audio, LAN Ports)
ASRock Live Update & APP Shop

CPU
Supports AMD AM4 Socket Ryzen 2000, 3000, 4000 G-Series, 5000 and 5000 G-Series Desktop Processors
Digi Power design
10 Power Phase design

Chipset
AMD Promontory B450

Memory
Dual Channel DDR4 Memory Technology
4 x DDR4 DIMM Slots
AMD Ryzen series CPUs (Vermeer) support DDR4 3200 / 2933 / 2667 / 2400 / 2133 ECC & non-ECC, un-buffered memory
AMD Ryzen series CPUs (Matisse) support DDR4 3200 / 2933 / 2667 / 2400 / 2133 ECC & non-ECC, un-buffered memory
AMD Ryzen series APUs (Cezanne) support DDR4 3200 / 2933 / 2667 / 2400 / 2133 ECC & non-ECC, un-buffered memory
AMD Ryzen series APUs (Renoir) 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: 128GB
Supports Extreme Memory Profile (XMP) memory modules
15µ Gold Contact in DIMM Slots

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

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.
Three graphics output options: D-Sub, DVI-D and HDMI
Supports Triple Monitor
Supports HDMI 1.4 with max. resolution up to 4K x 2K (4096x2160) @ 24Hz / (3840x2160) @ 30Hz
Supports DVI-D with max. resolution up to 1920x1200 @ 60Hz
Supports D-Sub with max. resolution up to 1920x1200 @ 60Hz
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 DVI-D and HDMI 1.4 Ports
Supports 4K Ultra HD (UHD) playback with HDMI 1.4 Port

Audio
7.1 CH HD Audio with Content Protection (Realtek ALC892/897 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

Slots
AMD Ryzen series CPUs (Vermeer, Matisse, Cezanne, Renoir, Summit Ridge and Pinnacle Ridge)
- 1 x PCI Express 3.0 x16 Slot (PCIE2: x16 mode)
- 1 x PCI Express 2.0 x16 Slot (PCIE3: x4 mode)
AMD Ryzen series CPUs (Picasso, Raven Ridge)
- 1 x PCI Express 3.0 x16 Slot (PCIE2: x8 mode)
- 1 x PCI Express 2.0 x16 Slot (PCIE3: x4 mode)
AMD Athlon series CPUs
- 1 x PCI Express 3.0 x16 Slot (PCIE2: x4 mode)
- 1 x PCI Express 2.0 x16 Slot (PCIE3: x4 mode)

1 x PCI Express 2.0 x1 Slot
Supports AMD Quad CrossFireX and CrossFireX

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 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 Vermeer, Matisse, Cezanne, Renoir, Picasso, Summit Ridge, Raven Ridge and Pinnacle Ridge) or Gen3 x2 (16 Gb/s) (with Athlon series APU)
1 x M.2 Socket (M2_2), supports M Key type 2230/2242/2260/2280 M.2 SATA3 6.0 Gb/s module

Connector
1 x COM Port Header
1 x TPM Header
1 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 CPU/Water Pump Fan Connector (4-pin) (Smart Fan Speed Control)
3 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
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)

Rear Panel I/O
1 x PS/2 Mouse/Keyboard Port
1 x D-Sub Port
1 x DVI-D Port
1 x HDMI Port
2 x USB 2.0 Ports (Supports ESD Protection)
1 x USB 3.2 Gen2 Type-A Port (10 Gb/s) (Supports ESD Protection)
1 x USB 3.2 Gen2 Type-C Port (10 Gb/s) (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

Software and UEFI
Software
- ASRock A-Tuning
- ASRock Polychrome SYNC
- ASRock XFast LAN
UEFI
- ASRock Full HD UEFI
- ASRock Instant Flash
- ASRock Easy RAID Installer

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 Screws for M.2 Sockets

Hardware Monitor
Temperature Sensing: CPU, CPU/Water Pump, Chassis/Water Pump Fans
Fan Tachometer: CPU, CPU/Water Pump, Chassis/Water Pump Fans
Quiet Fan (Auto adjust chassis fan speed by CPU temperature): CPU, CPU/Water Pump, Chassis/Water Pump Fans
Fan Multi-Speed Control: CPU, CPU/Water Pump, Chassis/Water Pump Fans
CASE OPEN detection
Voltage monitoring: +12V, +5V, +3.3V, Vcore

Form Factor
Micro ATX Form Factor: 9.6-in x 9.6-in, 24.4 cm x 24.4 cm
Solid Capacitor design

OS
Microsoft Windows 10 64-bit / 11 64-bit

• Socket: AM4
• CPU Compatibility: AMD Ryzen
• Chipset: AMD B450
• Form Factor: Micro ATX
• Memory Slots: DDR4 - 4 Slots
• M.2 Compatibility: NVMe / SATA
• USB C: No