Brand ASROCK
Model
B450 PRO4 R2.0

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

Socket
AM4

Chipset
AMD B450

Memory Support
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 (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
15 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.
**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.

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, HDMI and DisplayPort 1.2
Supports Triple Monitor
Supports HDMI 1.4 with max. resolution up to 4K x 2K (4096x2160) @ 24Hz / (3840x2160) @ 30Hz
Supports DisplayPort 1.2 with max. resolution up to 4K x 2K (4096x2160) @ 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 HDMI 1.4 and DisplayPort 1.2 Ports
Supports 4K Ultra HD (UHD) playback with HDMI 1.4 and DisplayPort 1.2 Ports

*Actual support may vary by CPU
**The Max shared memory 16GB requires 32GB system memory installed.

Multi Graphic Support
N/A

Audio
7.1 CH HD Audio with Content Protection (Realtek ALC892/897 Audio Codec)
Supports Surge Protection

Expansion Slots
AMD Ryzen series CPUs (Vermeer, Matisse, Renoir, Summit Ridge and Pinnacle Ridge)
- 2 x PCI Express 3.0 x16 Slots (PCIE2: x16 mode; PCIE4: x4 mode)*
AMD Ryzen series CPUs (Picasso, Raven Ridge)
- 2 x PCI Express 3.0 x16 Slots (PCIE2: x8 mode; PCIE4: x4 mode)*
AMD Athlon series CPUs
- 2 x PCI Express 3.0 x16 Slots (PCIE2: x4 mode; PCIE4: x2 mode)*

- 4 x PCI Express 2.0 x1 Slots
- Supports AMD Quad CrossFireX and CrossFireX**

*Supports NVMe SSD as boot disks
If M2_1 is occupied, PCIE4 will be disabled.
**This feature is only supported with Ryzen Series CPUs (Vermeer, Matisse, Renoir, Summit Ridge, Pinnacle Ridge, Picasso and Raven Ridge).

Maximum PCIe Version
PCIe 3.0

Storage
4 x SATA3 6.0 Gb/s Connectors, support RAID (RAID 0, RAID 1 and RAID 10), NCQ, AHCI and Hot Plug*
2 x SATA3 6.0 Gb/s Connectors by ASMedia ASM1061, support 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, 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 2230/2242/2260/2280/22110 M.2 SATA3 6.0 Gb/s module and M.2 PCI Express module up to Gen3 x2 (16 Gb/s)**

*M2_2, SATA3_3 and SATA3_4 share lanes. If either one of them is in use, the others will be disabled.
**If M2_1 is occupied, PCIE4 will be disabled.
Supports NVMe SSD as boot disks
Supports ASRock U.2 Kit

USB
N/A

Internal I/O Connectors
1 x COM Port Header
1 x TPM 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)

*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 CPU/Water Pump Fan supports the water cooler fan of maximum 2A (24W) fa