







- Model: B550 Pro4
B550 Pro4
- Supports AMD AM4 Socket Ryzen™ 3000, 3000 G-Series, 4000
G-Series, 5000 and 5000 G-Series Desktop Processors*
- 8 Power Phase Design, Digi Power
- Supports DDR4 4733+ (OC)
- 1 PCIe 4.0 x16, 1 PCIe 3.0 x16, 2 PCIe 3.0 x1, 1 M.2 Key E
for WiFi
- Graphics Output Options: HDMI, D-Sub
- AMD CrossFireX™
- 7.1 CH HD Audio (Realtek ALC1200 Audio Codec), Nahimic Audio
- 6 SATA3, 1 Hyper M.2 (PCIe Gen4 x4), 1 M.2 (PCIe Gen3 x2
& SATA3)
- 2 USB 3.2 Gen2 (Rear Type A+C), 6 USB 3.2 Gen1 (2 Front, 4
Rear)
- Gigabit LAN
- *Not compatible with AMD Athlon™ Processors.
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 - XXL Aluminum
Alloy Heatsink - Premium 50A Power
Choke - Sapphire Black
PCB - High Density
Glass Fabric PCB - 2oz Copper PCB ASRock Steel Slot
Gen4 ASRock Full
Coverage M.2 Heatsink ASRock Hyper M.2
(PCIe Gen4x4) ASRock POST Status
Checker (PSC) ASRock Full Spike
Protection (for all USB, Audio, LAN Ports) ASRock Live Update
& APP Shop |
CPU |
- Supports AMD AM4
Socket Ryzen™ 3000, 3000 G-Series, 4000 G-Series, 5000 and 5000 G-Series
Desktop Processors* - Digi Power design - 8 Power Phase
design *Not compatible
with AMD Athlon™ Processors. |
Chipset |
- AMD B550 |
MEMORY |
- Dual Channel DDR4
Memory Technology - 4 x DDR4 DIMM Slots - AMD Ryzen series
CPUs (Vermeer) support DDR4 4533+(OC) / 4466(OC) / 4400(OC) / 4333(OC) /
4266(OC) / 4200(OC) / 4133(OC) / 4000(OC) / 3866(OC) / 3800(OC) / 3733(OC) /
3600(OC) / 3466(OC) / 3200 / 2933 / 2667 / 2400 / 2133 ECC & non-ECC,
un-buffered memory* - AMD Ryzen series
CPUs (Matisse) support DDR4 4533+(OC) / 4466(OC) / 4400(OC) / 4333(OC) /
4266(OC) / 4200(OC) / 4133(OC) / 4000(OC) / 3866(OC) / 3800(OC) / 3733(OC) /
3600(OC) / 3466(OC) / 3200 / 2933 / 2667 / 2400 / 2133 ECC & non-ECC,
un-buffered memory* - AMD Ryzen series
APUs (Cezanne) support DDR4 4733+(OC) / 4666(OC) / 4600(OC) / 4533(OC) /
4466(OC) / 4400(OC) / 4333(OC) / 4266(OC) / 4200(OC) / 4133(OC) / 4000(OC) /
3866(OC) / 3800(OC) / 3733(OC) / 3600(OC) / 3466(OC) / 3200 / 2933 / 2667 /
2400 / 2133 ECC & non-ECC, un-buffered memory* - AMD Ryzen series
APUs (Renoir) support DDR4 4733+(OC) / 4666(OC) / 4600(OC) / 4533(OC) /
4466(OC) / 4400(OC) / 4333(OC) / 4266(OC) / 4200(OC) / 4133(OC) / 4000(OC) /
3866(OC) / 3800(OC) / 3733(OC) / 3600(OC) / 3466(OC) / 3200 / 2933 / 2667 /
2400 / 2133 ECC & non-ECC, un-buffered memory* - AMD Ryzen series
APUs (Picasso) support DDR4 3400+(OC) / 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 *For Ryzen Series
APUs (Picasso, Cezanne and Renoir), ECC is only supported with PRO CPUs. |
BIOS |
- 256Mb AMI UEFI
Legal BIOS with GUI support - Supports
"Plug and Play" - ACPI 5.1
compliance wake up events - Supports
jumperfree - SMBIOS 2.3
support - CPU, CPU
VDDCR_SOC, DRAM, VPPM, 1.05V_PROM_S5, 2.5V_PROM, +1.8VSB, VDDP 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.** - Dual graphics
output: support HDMI and D-Sub ports by independent display controllers - Supports HDMI 2.1
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 2.1
Port (Compliant HDMI monitor is required) - Supports HDR
(High Dynamic Range) with HDMI 2.1 - Supports HDCP 2.3
with HDMI 2.1 Port*** - Supports 4K Ultra
HD (UHD) playback with HDMI 2.1 Port - Supports
Microsoft® PlayReady *Actual support may
vary by CPU **The Max shared
memory 16GB requires 32GB system memory installed. ***Picasso supports
HDCP 2.2 with HDMI 2.0 Port |
Audio |
- 7.1 CH HD Audio
with Content Protection (Realtek ALC1200 Audio Codec) - Premium Blu-ray
Audio support - Supports Surge
Protection - PCB Isolate
Shielding - Individual PCB
Layers for R/L Audio Channel - Nahimic Audio |
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 and Matisse) - 2 x PCI Express
x16 Slots (PCIE1: Gen4x16 mode; PCIE3: Gen3 x4 mode)* AMD Ryzen series
APUs (Cezanne and Renoir) - 2 x PCI Express
x16 Slots (PCIE1: Gen3x16 mode; PCIE3: Gen3 x4 mode)* AMD Ryzen series
APUs (Picasso) - 2 x PCI Express
x16 Slots (PCIE1: Gen3x8 mode; PCIE3: Gen3 x4 mode)*
- 2 x PCI Express
3.0 x1 Slots - Supports AMD Quad
CrossFireX™ and CrossFireX™ - 1 x M.2 Socket
(Key E), supports type 2230 WiFi/BT PCIe WiFi module *Supports NVMe SSD
as boot disks |
Storage |
- 6 x SATA3 6.0
Gb/s Connectors, support RAID (RAID 0, RAID 1 and RAID 10), NCQ, AHCI and Hot
Plug* - 1 x Hyper M.2
Socket (M2_1), supports M Key type 2260/2280/22110 M.2 PCI Express module up
to Gen4x4 (64 Gb/s) (with Matisse) or Gen3x4 (32 Gb/s) (with Cezanne, Renoir
and Picasso)** - 1 x M.2 Socket
(M2_3), supports M Key type 2242/2260/2280 M.2 SATA3 6.0 Gb/s module and M.2
PCI Express module up to Gen3 x2 (16 Gb/s)** *M2_3 and SATA3_5_6
share lanes. If either one of them is in use, the other one will be disabled. **Supports NVMe SSD
as boot disks Supports ASRock U.2
Kit |
Connector |
- 1 x COM Port
Header - 1 x SPI TPM
Header - 1 x Power LED and
Speaker Header - 2 x RGB LED
Headers* - 2 x Addressable
LED Headers** - 1 x CPU Fan
Connector (4-pin)*** - 1 x CPU/Water
Pump Fan Connector (4-pin) (Smart Fan Speed Control)**** - 4 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 4 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) *Support in total
up to 12V/3A, 36W LED Strip **Support in total
up to 5V/3A, 15W LED Strip ***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, CHA_FAN3/WP and CHA_FAN4/WP can auto detect if
3-pin or 4-pin fan is in use. |
Rear Panel I/O |
- Antenna Bracket - 1 x PS/2
Mouse/Keyboard Port - 1 x D-Sub Port - 1 x HDMI Port - 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
Motherboard Utility (A-Tuning) - ASRock Polychrome
SYNC - ASRock XFast LAN UEFI - ASRock Full HD
UEFI - ASRock Instant
Flash *These utilities
can be downloaded from ASRock Live Update & APP Shop. |
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 - 3 x Screws for
M.2 Sockets - 1 x Standoff for
M.2 Socket |
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 - Voltage
monitoring: +12V, +5V, +3.3V, CPU Vcore, CPU VDDCR_SOC, DRAM, VPPM,
1.05V_PROM_S5, +1.8V, VDDP |
Form Factor |
- ATX Form Factor:
12.0-in x 9.6-in, 30.5 cm x 24.4 cm - Solid Capacitor
design - 2oz Copper PCB |
OS |
- Microsoft®
Windows® 10 64-bit / 11 64-bit |
Certifications |
- FCC, CE |
Warranty |
3 Years |
Note* |
Price, feature and
specifications are subject to change without notice. |