ASRock Rack B550D4-4L ATX Motherboard
ASRock Rack B550D4-4L ATX Motherboard
ASRock Rack B550D4-4L ATX Motherboard
ASRock Rack B550D4-4L ATX Motherboard
ASRock Rack B550D4-4L ATX Motherboard

ASRock Rack B550D4-4L ATX Motherboard

In Stock
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AsRockRack B550D4-4L key features:

  1. ATX (12"x 9.6")
  2. supports AMD Ryzen 5000 Series Desktop Processors
  3. 4 DIMMs
  4. 1 PCIe 4.0 x16, 1 PCIe 4.0 x4
  5. 4 RJ45 (1GbE)
  6. 6 SATA 6Gb/s
  7. 1 M.2
  8. HDMI
  9. AST2500 Remote management (IPMI)


ASRock Rack B550D4-4L ATX Motherboard

International buyers, please email us for a shipping quote


 Physical Status
Form Factor ATX
 Processor System
CPU AMD Ryzen™ 5000 Series Desktop Processors
AMD Ryzen™ 4000 G-Series Desktop Processors with Radeon™ Graphics
AMD Ryzen™ PRO 4000 and 3000 Series Desktop Processors
3rd Gen AMD Ryzen™ Desktop Processors
Socket AM4 PGA 1331
Chipset AMD B550
 System Memory
Capacity 4 DDR4 DIMM slots
Type DDR4 288-pin ECC/non-ECC UDIMM
DIMM Size Per DIMM up to 32GB per DIMM
DIMM Frequency up to 3200 MT/s
Voltage 1.2V
 Expansion Slot
PCIe 4.0 x 16 SLOT6: PCIe x16 (PCIe 4.0 x16)
PCIe 4.0 x 8 SLOT4: PCIe x8 (PCIe4.0 x4)
M.2 1 M-key (PCIe3.0x4 or SATA 6Gb/s); support 22110/2280/2242 form factor
SATA Controller AMD B550 (RAID 0/1/10):
4 SATA 7-pin (SATA 6Gb/s)
Additional Storage Controller ASM1061:
2 SATA 7-pin (SATA 6Gb/s)
Additional GbE Controller 4 Intel® i210:
4 RJ45 (1 GbE)
BMC Controller ASPEED AST2500
IPMI Dedicated GLAN 1 x Realtek RTL8211E for dedicated management GLAN
Controller ASPEED AST2500:
1 DB15, 1 (15-pin) header

 Rear Panel I/O
VGA Port 1 DB15
USB 3.2 Gen1 Port 2 Type-A
USB 3.2 Gen2 Port 2 Type-A
Lan Port 4 RJ45 (1GbE)
Dedicate LAN 1 dedicated IPMI
Serial Port 1 DB9
UID Button/UID LED 1
 Internal Connector
COM Header 1
Front Lan LED Connector 1 for LAN3/LAN4
Auxiliary Panel Header 1 (18-pin): chassis intrusion, system fault LED, LAN1/LAN2 activity LED, locate, SMBus
TPM Header 1 (17-pin, LPC), 1 (13-pin, SPI)
Thermal Sensor Header 1
IPMB Header 1
VGA Header 1
Buzzer 1
Fan Header 6 (6-pin)
USB 3.2 (Gen1) Header 1 (19-pin) support 2 USB3.2 Gen1
USB 2.0 Header 1 (9-pin) support 2 USB2.0
Type A USB 3.2 (Gen1) Port 1
System Panel 1 (9-pin): power switch, reset switch, system power LED, HDD activity LED
Speaker Header 1
BMC_SMB Header 1
Power Connector 1 (24-pin, ATX main power), 1 (8-pin, ATX 12V), 1 (4-pin, ATX 12V)
Clear CMOS 1 contact pads
 Onboard LED
Standby PWR LED 5vsb 1
80 Debug Port LED 1
Fan Fail LED 6
 System BIOS
BIOS Type AMI UEFI BIOS; 256 Mb (32MB) SPI Flash ROM
BIOS Features Plug and Play, ACPI 5.1 compliance wake up events, SMBIOS 2.3
 Hardware Monitor
Temperature CPU, DDR, MB, Card Side, FCH, TR1 sensing
Fan Fan Tachometer
CPU Quiet Fan (Allow Chassis Fan Speed Auto-Adjust by CPU Temperature)
Multi-Speed Control
Voltage 3VSB, 5VSB, VCPU, VSOC, VCCM, APU VDDP, 1.05V_PROM_S5, 2.5V_PROM, 1.05V_PROM_RUN, BAT, 3V, 5V, 12V
Temperature Operation temperature: 10°C ~ 35°C / Non operation temperature: -40°C ~ 70°C

The specification is subject to change without notice in advance. The brand and product names are trademarks of their respective companies. Any configuration other than the original product specification is not guaranteed.

Form Factor
Ethernet Ports
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