ASROCK B450 Pro4 DDR4 AMD Motherboard
MPN ASROCK-B450-PRO4 · Brand ASROCK · ATX
The ASRock B450 Pro4 is a full ATX AMD AM4 motherboard featuring dual M.2 slots, six SATA3 ports, USB 3.1 Gen2 Type-A and Type-C, and triple display output supporting up to 4K — ideal for AMD Ryzen builds
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Overview
The ASRock B450 Pro4 is a full-size ATX motherboard built on the AMD B450 chipset, designed for AMD AM4 socket processors including Ryzen series (Summit Ridge, Pinnacle Ridge, and Raven Ridge). Measuring 12.0 x 8.8 inches (30.5 x 22.4 cm), it fits standard mid-tower and full-tower cases, making it a versatile foundation for desktop AMD Ryzen builds. Memory support is handled through four DDR4 DIMM slots in a dual-channel configuration, accepting up to 64 GB of unbuffered DDR4 RAM. Supported speeds reach DDR4 3200 via overclocking, with native support for 2933, 2667, 2400, and 2133 MHz. ECC memory is supported with Pinnacle Ridge and Summit Ridge CPUs. DIMM slots feature 15-micron gold contacts for reliable long-term connectivity. Storage is a strong point of this board. Six SATA3 6.0 Gb/s connectors are available — four natively supporting RAID 0, RAID 1, and RAID 10, and two additional connectors powered by the ASMedia ASM1061 controller. Two M.2 sockets round out the storage options: the primary Ultra M.2 slot (M2_1) runs up to PCIe Gen3 x4 at 32 Gb/s for NVMe drives, while the secondary slot (M2_2) supports both SATA3 and PCIe Gen3 x2 (16 Gb/s), accommodating form factors from 2230 to 22110. Expansion slots include two PCIe 3.0 x16 slots and four PCIe 2.0 x1 slots. With Summit Ridge and Pinnacle Ridge CPUs, the primary x16 slot runs at full x16 bandwidth. AMD Quad CrossFireX multi-GPU configurations are supported. The board's 9-phase digital power design (Digi Power) delivers stable CPU Vcore voltage, while the ASRock Super Alloy build includes a 2oz copper PCB, high-density glass fabric PCB, and premium power choke for enhanced durability. Connectivity on the rear I/O panel includes one USB 3.1 Gen2 Type-A port and one USB 3.1 Gen2 Type-C port (both at 10 Gb/s), four USB 3.1 Gen1 ports, two USB 2.0 ports, a PS/2 keyboard/mouse port, and a Realtek RTL8111H Gigabit LAN port with Wake- LAN and Energy Efficient Ethernet (802.3az) support. Three video outputs — D-Sub, HDMI, and DisplayPort 1.2 — enable triple-monitor configurations when using Ryzen APUs with integrated Radeon Vega graphics. HDMI supports up to 4K at 30 Hz; DisplayPort 1.2 supports up to 4K at 60 Hz. Audio is delivered through a Realtek ALC892 codec with 7.1-channel HD audio output and ELNA audio capacitors for reduced noise floor. RGB and addressable LED headers, along with ASRock Polychrome RGB software, allow lighting customization. Full Spike Protection covers all USB, audio, and LAN ports against ESD and power surges. Verified Specifications: - Socket: AMD AM4 - Chipset: AMD B450 - Form Factor: ATX (30.5 x 22.4 cm) - Memory: 4x DDR4 DIMM, Dual Channel, up to 64 GB, DDR4 3200 (OC) - Storage: 6x SATA3, 1x Ultra M.2 PCIe Gen3 x4 (32 Gb/s), 1x M.2 PCIe Gen3 x2/SATA3 - PCIe Slots: 2x PCIe 3.0 x16, 4x PCIe 2.0 x1 - USB (Rear): 1x Gen2 Type-A, 1x Gen2 Type-C, 4x Gen1, 2x USB 2.0 - Display Outputs: D-Sub, HDMI (4K@30Hz), DisplayPort 1.2 (4K@60Hz) - Audio: Realtek ALC892, 7.1 CH HD, ELNA audio caps - LAN: Realtek RTL8111H, 1 Gbps - Power: 24-pin ATX + 8-pin 12V - BIOS: 128Mb AMI UEFI with multilingual GUI - Warranty: 3 Years - Certifications: FCC, CE, ErP/EuP ready
Datasheet
| Warranty | 3 Years |
|---|---|
| Form Factor | ATX |
| Chipset | – AMD Promontory B450 |
| CPU Type | AMD AM4 Socket- Digi Power design- 9 Power Phase design- Supports 105W Water Cooling (Pinnacle Ridge); Supports 95W Water Cooling (Summit Ridge); Supports 65W Water Cooling (Raven Ridge) |
| Os | – Microsoft Windows 10 64-bit |
| 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 |
| 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 |
| Audio | – 7.1 CH HD Audio with Content Protection (Realtek ALC892 Audio Codec)*- Premium Blu-ray Audio support- Supports Surge Protection- ELNA Audio Caps |
| Slots | AMD Ryzen series CPUs (Summit Ridge and Pinnacle Ridge)- 2 x PCI Express 3.0 x16 Slots (PCIE2: x16 mode; PCIE4: x4 mode)*AMD Ryzen series CPUs (Raven Ridge)- 2 x PCI Express 3.0 x16 Slots (PCIE2: x8 mode; PCIE4: x4 mode) (If you use Athlon 200GE APU, PCIE2 slot will run at x4 mode.)*- 4 x PCI Express 2.0 x1 Slots- Supports AMD Quad CrossFireX™ and CrossFireX™***Supports NVMe SSD as boot disksIf M2_1 is occupied, PCIE4 will be disabled.**This feature is only supported with Ryzen Series CPUs (Summit Ridge, Pinnacle Ridge and Raven Ridge) |
| Memory | – Dual Channel DDR4 Memory Technology- 4 x DDR4 DIMM Slots- AMD Ryzen series CPUs (Pinnacle Ridge) support DDR4 3200 (OC) / 2933/2667/2400/2133 ECC & 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**- 15μ Gold Contact in DIMM Slots |
| 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 Summit Ridge, Raven Ridge and Pinnacle Ridge)**- 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) |
| Graphics | – Integrated AMD Radeon™ Vega Series Graphics in Ryzen Series APU*- DirectX 12, Pixel Shader 5.0- Max. shared memory 2GB- Three graphics output options: D-Sub, HDMI and DisplayPort 1.2- Supports Triple Monitor- Supports HDMI with max. resolution up to 4K x 2K (4096×2160) @ 24Hz / (3840×2160) @ 30Hz- Supports DisplayPort 1.2 with max. resolution up to 4K x 2K (4096×2160) @ 60Hz- Supports D-Sub with max. resolution up to 1920×1200 @ 60Hz- Supports Auto Lip Sync, Deep Color (12bpc), xvYCC and HBR (High Bit Rate Audio) with HDMI Port (Compliant HDMI monitor is required)- Supports HDCP with HDMI and DisplayPort 1.2 Ports- Supports 4K Ultra HD (UHD) playback with HDMI and DisplayPort 1.2 Ports |
| Connector | – 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 3.1 Gen1 Header (Supports 2 USB 3.1 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) fan power.******The Chassis/Water Pump Fan supports the water cooler fan of maximum 2A (24W) fan power.CPU_FAN2/WP, CHA_FAN1/WP, CHA_FAN2/WP and CHA_FAN3/WP can auto detect if 3-pin or 4-pin fan is in use |
| 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 |
| Certifications | – FCC, CE- ErP/EuP ready (ErP/EuP ready power supply is required) |
| Rear Panel I/O | – 1 x PS/2 Mouse/Keyboard Port- 1 x D-Sub Port- 1 x HDMI Port- 1 x DisplayPort 1.2- 2 x USB 2.0 Ports (Supports ESD Protection)- 1 x USB 3.1 Gen2 Type-A Port (10 Gb/s) (Supports ESD Protection)- 1 x USB 3.1 Gen2 Type-C Port (10 Gb/s) (Supports ESD Protection)- 4 x USB 3.1 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 |
| Unique Feature | ASRock USB 3.1 Gen2- ASRock USB 3.1 Gen2 Type-A Port (10 Gb/s)- ASRock USB 3.1 Gen2 Type-C Port (10 Gb/s)ASRock Super Alloy- Premium Power Choke- Sapphire Black PCB- High Density Glass Fabric PCB- 2oz Copper PCBASRock Ultra M.2 (PCIe Gen3 x4)ASRock Full Spike Protection (for all USB, Audio, LAN Ports) |
| Hardware Monitor | – Temperature Sensing: CPU, MB- 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- Voltage monitoring: 12V, 5V, 3.3V, Vcore |
| Software And Uefi | Software- ASRock A-Tuning- ASRock Polychrome RGB- ASRock XFast LANUEFI- ASRock Full HD UEFI- ASRock Instant Flash- ASRock Easy RAID Installer |




