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B550d4u Server Motherboard Am4 PGA1331 AMD Ryzen 5000 DDR4 for Asrock Rack

Product Details

Customization:	Available
Integrated Graphics:	Integrated Graphics
Main Chipset:	AMD

Beijing Teket Innovation Technology Company Limited

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Product Description

Company Info.

Basic Info.

Model NO.

B550D4U

Maximum Memory Capacity

32G

Structure

Micro ATX

Memory

DDR4

SATA Interface

SATA2.0

CPU Socket

PGA1331

Printed Circuit Board

Six Layer

Main Board Structure

Integrated

Audio Effects

Not HiFi

Transport Package

Yes

Specification

9.6" x 9.6"

Trademark

ASRock Rack

Origin

Bj, Cn

Product Description

B550d4u Server Motherboard Am4 PGA1331 AMD Ryzen 5000 DDR4 for Asrock Rack

Order information
B550D4M ATX AM4 PGA1331 AMD Ryzen 5000 4 DDR4-3200 UDIMM 2*PCIe 1*M.2 1*OCP 2*GLAN 7*SATA HDMI
B550D4-4L ATX AM4 PGA1331 AMD Ryzen 5000 4 DDR4-3200 UDIMM 2*PCIe 1*M.2 6*SATA 2*GLAN HDMI
B550D4U Micro-ATX AM4 PGA1331 AMD Ryzen 5000 4 DDR4-3200 UDIMM 1*PCIe4.0 2*M.2 6*SATA 2*GLAN
B550D4U-2T (BTO) Micro-ATX AM4 PGA1331 AMD Ryzen 5000 4 DDR4-3200 UDIMM 1*PCIe4.0 2*M.2 6*SATA 2*10GLAN
B450D4U-V1L (BTO) Micro-ATX AM4 PGA1331 AMD Ryzen 2000 4 DDR4-3200 UDIMM 1*PCIe3.0 1*M.2 4*SATA 2*GLAN
B550D4ID-2L2T (BTO) Deep Mini-ITX AM4 PGA1331 AMD Ryzen 5000 4 DDR4-3200 UDIMM 1*PCIe4.0 1*OCulink 4*SATA 2*10GLAN 2*GLAN ATX/12VDC

B550d4u Server Motherboard Am4 PGA1331 AMD Ryzen 5000 DDR4 for Asrock Rack

B550D4U
Micro-ATX (9.6" x 9.6")
Support AMD Ryzen 5000 Series Desktop Processors
4 DIMM slots (2DPC), supports DDR4 ECC/non-ECC UDIMM
1 PCIe4.0 x16, 1 PCIe4.0 x4
1 M.2 (PCIe3.0 x4 or SATA 6Gb/s), 1 M.2 (PCIe3.0 x2)
6 SATA 6Gb/s
2 RJ45 (1GbE) by Intel® i210
Remote management (IPMI)

Specifications

Physical Status
Form Factor	Micro-ATX
Dimensions	9.6" x 9.6"
Processor System
CPU	Supports: AMD Ryzen™ 5000 and 4000 G-Series Desktop Processors with Radeon™ Graphics AMD Ryzen™ 5000 and 3000 Series Desktop Processors AMD Ryzen™ PRO 5000, 4000 and 3000* Series Desktop Processors * Not compatible with AMD Ryzen™ PRO 3000 Series Desktop Processors with Radeon™ Graphics
Socket	Single Socket AM4 (PGA1331)
Chipset	AMD B550
System Memory
Supported DIMM Quantity	4 DIMM slots (2DPC)
Supported Type	Supports DDR4 288-pin ECC/non-ECC UDIMM For AMD Ryzen Desktop Processors with Radeon Graphics, ECC support is only with Processors with PRO technologies.
Max. Capacity per DIMM	ECC/non-ECC UDIMM: up to 32GB
Max. DIMM Frequency	up to 3200 MHz* * AMD Ryzen™ 3000 G-Series Desktop Processors with Radeon™ Graphics support up to 2666 MHz
Voltage	1.2V
PCIe Expansion Slots (SLOT7 close to CPU)
PCIe x 16	SLOT6: Latch PCIe4.0* x16 [CPU] *Supports PCIe3.0 when using AMD Ryzen™ 5000, 4000 G-Series Desktop Processors with Radeon™ Graphics
PCIe x 4	SLOT4: PCIe4.0* x4 [CPU] *Supports PCIe3.0 when using AMD Ryzen™ 5000, 4000 G-Series Desktop Processors with Radeon™ Graphics
Other PCIe Expansion Connectors
M.2 slot	1 M-key (PCIe3.0 x4 or SATA 6Gb/s), supports 22110/2280/2260/2242 form factor [FCH] 1 M-key (PCIe3.0 x2), supports 22110/2280/2260/2242 form factor [FCH]
SATA/SAS Storage
PCH Built-in Storage	AMD B550 (4 SATA 6Gb/s; RAID 0/1/10): 3 SATA 7-pin, 1 SATA DOM
Additional SATA Controller	ASM 1061 (2 SATA 6Gb/s): 2 SATA 7-pin
Ethernet
Additional GbE Controller	Intel^® i210: 2 RJ45 (1GbE)
Graphics
Controller	ASPEED AST2500: 1 DB15, 1 (15-pin) header AMD Ryzen Desktop Processors with Radeon Graphics: 1 HDMI
Rear I/O
UID Button/LED	1 UID button w/ LED
VGA Port	1 DB15, 1 HDMI
Serial Port	1 DB9
USB 3.2 Gen2 Port	2 Type-A (USB3.2 Gen2)
RJ45	2 RJ45 (1GbE) 1 dedicated IPMI
Internal Connector/Headers
Power Connector	1 (24-pin, ATX main power), 1 (8-pin, ATX 12V)
Auxiliary Panel Header	1 (19-pin): chassis intrusion, system fault LED, LAN activity LED
System Panel	1 (9-pin): power switch, reset switch, system power LED, HDD activity LED
VGA header	1
Speaker Header	1 (4-pin)
Buzzer	1
Fan Header	4 (6-pin), 2 (4-pin)
Thermal Sensor Header	1
TPM Header	1 (17-pin, LPC), 1 (13-pin, SPI)
SMBus header	1
PMBus header	1
IPMB Header	1
Clear CMOS	1 (contact pads)
USB 3.2 (Gen1) Header	1 (19-pin, 2 USB3.2 Gen1)
LED Indicators
Standby PWR LED	1
80 Debug Port LED	1
Fan Fail LED	6
BMC heartbeat LED	1
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
Fan	Fan Tachometer Multi-Speed Control CPU Quiet Fan (Allow Chassis Fan Speed Auto-Adjust by CPU Temperature)
Voltage	3VSB, 5VSB, VCPU, VSOC, VCCM, APU VDDP, 1.05V_PROM_S5, 2.5V_PROM, 1.05V_PROM_RUN, BAT, 3V, 5V, 12V
Supported OS
OS	Microsoft^® Windows: - Windows^® 10 (64 bit) - Windows^® 11 (64 bit) Linux: - RedHat Enterprise Linux Server 8.5 (64bit) / 7.9 (64bit) - CentOs 8.5 ( 64 bit) / 7.9 (64bit) - SUSE SLES 15.2(64 bit) - UBuntu 21.10 (64 bit) / 21.04 (64 bit) Hypervisor: - VMWare^® ESXi 6.7.0 U3 * On the Windows^® system, Raid mode supports UEFI Boot only. * The Linux system doesn't support Raid Mode.
Environment
Temperature	Operation temperature: 10°C ~ 35°C / Non operation temperature: -40°C ~ 70°C
Humidity	Non operation humidity: 20% ~ 90% ( Non condensing)

B550D4M
ATX (12"x 9.6")
Support AMD Ryzen 5000 Series Desktop Processors
4 DIMM slots (2DPC), supports DDR4 ECC/non-ECC UDIMM
1 PCIe4.0 x8, 1 PCIe4.0 x4
1 M.2 (PCIe3.0 x4 or SATA 6Gb/s)
1 OCP 2.0 Mezzanine connector A (PCIe3.0 x8)
2 RJ45 (1GbE) by Intel® i210
7 SATA 6Gb/s
HDMI
Remote management (IPMI)

Specifications

Physical Status
Form Factor	ATX
Dimensions	12" x 9.6" (305 mm x 244 mm)
Processor System
CPU	Supports: AMD Ryzen™ 5000 and 4000 G-Series Desktop Processors with Radeon™ Graphics AMD Ryzen™ 5000 and 3000 Series Desktop Processors AMD Ryzen™ PRO 5000, 4000 and 3000* Series Desktop Processors * Not compatible with AMD Ryzen™ PRO 3000 Series Desktop Processors with Radeon™ Graphics
Socket	Single Socket AM4 (PGA1331)
Chipset	AMD B550
System Memory
Supported DIMM Quantity	4 DIMM slots (2DPC)
Supported Type	Supports DDR4 288-pin ECC/non-ECC UDIMM For AMD Ryzen Desktop Processors with Radeon Graphics, ECC support is only with Processors with PRO technologies.
Max. Capacity per DIMM	ECC/non-ECC UDIMM: up to 32GB
Max. DIMM Frequency	up to 3200 MHz* * AMD Ryzen™ 3000 G-Series Desktop Processors with Radeon™ Graphics support up to 2666 MHz
Voltage	1.2V
PCIe Expansion Slots (SLOT7 close to CPU)
PCIe x 16	SLOT6: PCIe x16 (PCIe4.0* x8) [CPU] *Supports PCIe3.0 when using AMD Ryzen™ 5000, 4000 G-Series Desktop Processors with Radeon™ Graphics
PCIe x 8	SLOT4: PCIe x8 (PCIe4.0* x4) [CPU] *Supports PCIe3.0 when using AMD Ryzen™ 5000, 4000 G-Series Desktop Processors with Radeon™ Graphics
Mezzanine slot	1 OCP 2.0 Mezzanine connector A (PCIe3.0 x8) [CPU]
M.2	1 M-key (PCIe3.0x4 or SATA 6Gb/s); support 22110/2280/2242 form factor [FCH]
SATA/SAS Storage
PCH Built-in Storage	AMD B550 (5 SATA 6Gb/s; RAID 0/1/10): 4 SATA 7-pin, 1 M.2
Additional SATA Controller	ASM1061 (2 SATA6Gb/s): 2 SATA 7-pin
Ethernet
Additional GbE Controller	2 Intel^® i210: 2 RJ45 (1GbE)
Server Management
BMC Controller	ASPEED AST2500
IPMI Dedicated GLAN	1 x Realtek RTL8211E for dedicated management GLAN
Graphics
Controller	ASPEED AST2500: 1 DB15, 1 (15-pin) header AMD Ryzen Desktop Processors with Radeon Graphics: 1 HDMI
Rear I/O
UID Button/LED	1 UID button, 1 UID LED
VGA Port	1 DB15, 1 HDMI
Serial Port	1 DB9
USB 3.2 Gen1 Port	2 Type-A (USB3.2 Gen1)
USB 3.2 Gen2 Port	2 Type-A (USB3.2 Gen2)
RJ45	2 RJ45 (1GbE) 1 dedicated IPMI
Internal Connector/Headers
Power Connector	1 (24-pin, ATX main power), 1 (8-pin, ATX 12V), 1 (4-pin, ATX 12V)
Auxiliary Panel Header	1 (18-pin): chassis intrusion, system fault LED, LAN1/LAN2 activity LED, locate, SMBus
System Panel	1 (9-pin): power switch, reset switch, system power LED, HDD activity LED
COM Header	1
VGA header	1
Speaker Header	1
Buzzer	1
Fan Header	6 (6-pin)
Thermal Sensor Header	1
TPM Header	1 (17-pin, LPC), 1 (13-pin, SPI)
SMBus header	1
PMBus header	1
IPMB Header	1
Clear CMOS	1 (contact pads)
USB 3.2 (Gen1) Header	1 (19-pin, 2 USB3.2 Gen1)
USB 2.0 Header	1 (9-pin, 2 USB2.0)
Type A USB 3.2 (Gen1) Port	1 (Type-A, 1 USB3.2 Gen1)
LED Indicators
Standby PWR LED	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
Environment
Temperature	Operation temperature: 10°C ~ 35°C / Non operation temperature: -40°C ~ 70°C
Humidity	Non operation humidity: 20% ~ 90% ( Non condensing)

B550D4-4L
ATX (12"x 9.6")
Support AMD Ryzen 5000 Series Desktop Processors
4 DIMM slots (2DPC), supports DDR4 ECC/non-ECC UDIMM
1 PCIe 4.0 x16, 1 PCIe 4.0 x4
Supports 1 M.2 (PCIe3.0 x4 or SATA 6Gb/s)
6 SATA 6Gb/s
4 RJ45 (1GbE) by Intel® i210
HDMI
Remote management (IPMI)

Specifications

Physical Status
Form Factor	ATX
Dimensions	12" x 9.6" (305 mm x 244 mm)
Processor System
CPU	Supports: AMD Ryzen™ 5000 and 4000 G-Series Desktop Processors with Radeon™ Graphics AMD Ryzen™ 5000 and 3000 Series Desktop Processors AMD Ryzen™ PRO 5000, 4000 and 3000* Series Desktop Processors * Not compatible with AMD Ryzen™ PRO 3000 Series Desktop Processors with Radeon™ Graphics
Socket	Single Socket AM4 (PGA1331)
Chipset	AMD B550
System Memory
Supported DIMM Quantity	4 DIMM slots (2DPC)
Supported Type	Supports DDR4 288-pin ECC/non-ECC UDIMM For AMD Ryzen Desktop Processors with Radeon Graphics, ECC support is only with Processors with PRO technologies.
Max. Capacity per DIMM	ECC/non-ECC UDIMM: up to 32GB
Max. DIMM Frequency	up to 3200 MHz* * AMD Ryzen™ 3000 G-Series Desktop Processors with Radeon™ Graphics support up to 2666 MHz
Voltage	1.2V
PCIe Expansion Slots (SLOT7 close to CPU)
PCIe x 16	SLOT6: PCIe x16 (PCIe4.0* x16) [CPU] *Supports PCIe3.0 when using AMD Ryzen™ 5000, 4000 G-Series Desktop Processors with Radeon™ Graphics
PCIe x 8	SLOT4: PCIe x8 (PCIe4.0* x4) [CPU] *Supports PCIe3.0 when using AMD Ryzen™ 5000, 4000 G-Series Desktop Processors with Radeon™ Graphics
Other PCIe Expansion Connectors
M.2 slot	1 M-key (PCIe3.0 x4 or SATA 6Gb/s); support 22110/2280/2242 form factor [FCH]
SATA/SAS Storage
PCH Built-in Storage	AMD B550 (4 SATA 6Gb/s; RAID 0/1/10): 4 SATA 7-pin
Additional SATA Controller	ASM1061 (2 SATA6Gb/s): 2 SATA 7-pin
Ethernet
Additional GbE Controller	4 Intel^® i210: 4 RJ45 (1GbE)
Server Management
BMC Controller	ASPEED AST2500
IPMI Dedicated GLAN	1 x Realtek RTL8211E for dedicated management GLAN
Graphics
Controller	ASPEED AST2500: 1 DB15, 1 (15-pin) header AMD Ryzen™ Desktop Processors with Radeon™ Graphics: 1 HDMI
Rear I/O
UID Button/LED	1 UID button, 1 UID LED
VGA Port	1 DB15, 1 HDMI
Serial Port	1 DB9
USB 3.2 Gen1 Port	2 Type-A (USB3.2 Gen1)
USB 3.2 Gen2 Port	2 Type-A (USB3.2 Gen2)
RJ45	4 RJ45 (1GbE) 1 dedicated IPMI
Internal Connector/Headers
Power Connector	1 (24-pin, ATX main power), 1 (8-pin, ATX 12V), 1 (4-pin, ATX 12V)
Auxiliary Panel Header	1 (18-pin): chassis intrusion, system fault LED, LAN1/LAN2 activity LED, locate, SMBus
System Panel	1 (9-pin): power switch, reset switch, system power LED, HDD activity LED
COM Header	1
VGA header	1
Speaker Header	1
Buzzer	1
Fan Header	6 (6-pin)
Thermal Sensor Header	1
TPM Header	1 (17-pin, LPC), 1 (13-pin, SPI)
SMBus header	1
PMBus header	1
IPMB Header	1
Clear CMOS	1 (contact pads)
Front Lan LED Connector	1 for LAN3/LAN4
USB 3.2 (Gen1) Header	1 (19-pin, 2 USB3.2 Gen1)
USB 2.0 Header	1 (9-pin, 2 USB2.0)
Type A USB 3.2 (Gen1) Port	1 (Type-A, 1 USB3.2 Gen1)
LED Indicators
Standby PWR LED	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
Environment
Temperature	Operation temperature: 10°C ~ 35°C / Non operation temperature: -40°C ~ 70°C
Humidity	Non operation humidity: 20% ~ 90% ( Non condensing)

B550D4U-2T (BTO)
Micro-ATX (9.6" x 9.6")
Support AMD Ryzen 5000 Series Desktop Processors
4 DIMM slots (2DPC), supports DDR4 ECC/non-ECC UDIMM
1 PCIe4.0 x16, 1 PCIe4.0 x4
1 M.2 (PCIe3.0 x4 or SATA 6Gb/s)
6 SATA 6Gb/s
2 RJ45 (10GbE) by Intel® X710-AT2
Remote management (IPMI)

Specifications

Physical Status
Form Factor	Micro-ATX
Dimensions	9.6" x 9.6"
Processor System
CPU	Supports: AMD Ryzen™ 5000 and 4000 G-Series Desktop Processors with Radeon™ Graphics AMD Ryzen™ 5000 and 3000 Series Desktop Processors AMD Ryzen™ PRO 5000, 4000 and 3000* Series Desktop Processors * Not compatible with AMD Ryzen™ PRO 3000 Series Desktop Processors with Radeon™ Graphics
Socket	Single Socket AM4 (PGA1331)
Chipset	AMD B550
System Memory
Supported DIMM Quantity	4 DIMM slots (2DPC)
Supported Type	Supports DDR4 288-pin ECC/non-ECC UDIMM For AMD Ryzen Desktop Processors with Radeon Graphics, ECC support is only with Processors with PRO technologies.
Max. Capacity per DIMM	ECC/non-ECC UDIMM: up to 32GB
Max. DIMM Frequency	up to 3200 MHz* * AMD Ryzen™ 3000 G-Series Desktop Processors with Radeon™ Graphics support up to 2666 MHz
Voltage	1.2V
PCIe Expansion Slots (SLOT7 close to CPU)
PCIe x 16	SLOT6: Latch PCIe4.0* x16 [CPU] *Supports PCIe3.0 when using AMD Ryzen™ 5000, 4000 G-Series Desktop Processors with Radeon™ Graphics
PCIe x 4	SLOT4: PCIe4.0* x4 [CPU] *Supports PCIe3.0 when using AMD Ryzen™ 5000, 4000 G-Series Desktop Processors with Radeon™ Graphics
Other PCIe Expansion Connectors
M.2 slot	1 M-key (PCIe3.0 x4 or SATA 6Gb/s), supports 22110/2280/2260/2242 form factor [FCH]
SATA/SAS Storage
PCH Built-in Storage	AMD B550 (4 SATA 6Gb/s; RAID 0/1/10): 3 SATA 7-pin, 1 SATA DOM
Additional SATA Controller	ASM 1061 (2 SATA 6Gb/s): 2 SATA 7-pin
Ethernet
Additional GbE Controller	1 Intel^® X710-AT2: 2 RJ45 (10GbE)
Graphics
Controller	ASPEED AST2500: 1 DB15, 1 (15-pin) header AMD Ryzen Desktop Processors with Radeon Graphics: 1 HDMI
Rear I/O
UID Button/LED	1 UID button w/ LED
VGA Port	1 DB15, 1 HDMI
Serial Port	1 DB9
USB 3.2 Gen1 Port	2 Type-A (USB3.2 Gen1)
RJ45	2 RJ45 (10GbE) 1 dedicated IPMI
Internal Connector/Headers
Power Connector	1 (24-pin, ATX main power), 1 (8-pin, ATX 12V)
Auxiliary Panel Header	1 (19-pin): chassis intrusion, system fault LED, LAN activity LED
System Panel	1 (9-pin): power switch, reset switch, system power LED, HDD activity LED
VGA header	1
Speaker Header	1 (4-pin)
Buzzer	1
Fan Header	4 (6-pin), 2 (4-pin)
Thermal Sensor Header	1
TPM Header	1 (17-pin, LPC), 1 (13-pin, SPI)
SMBus header	1
PMBus header	1
IPMB Header	1
Clear CMOS	1 (contact pads)
USB 3.2 (Gen1) Header	1 (19-pin, 2 USB3.2 Gen1)
LED Indicators
Standby PWR LED	1
80 Debug Port LED	1
Fan Fail LED	6
BMC heartbeat LED	1
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
Fan	Fan Tachometer Multi-Speed Control CPU Quiet Fan (Allow Chassis Fan Speed Auto-Adjust by CPU Temperature)
Voltage	3VSB, 5VSB, VCPU, VSOC, VCCM, APU VDDP, 1.05V_PROM_S5, 2.5V_PROM, 1.05V_PROM_RUN, BAT, 3V, 5V, 12V
Supported OS
OS	Microsoft^® Windows: - Windows^® 10 (64 bit) - Windows^® 11 (64 bit) Linux: - RedHat Enterprise Linux Server 8.5 (64bit) / 7.9 (64bit) - CentOs 8.5 ( 64 bit) / 7.9 (64bit) - SUSE SLES 15.2(64 bit) - UBuntu 21.10 (64 bit) / 21.04 (64 bit) Hypervisor: - VMWare^® ESXi 6.7.0 U3 * On the Windows^® system, Raid mode supports UEFI Boot only. * The Linux system doesn't support Raid Mode.
Environment
Temperature	Operation temperature: 10°C ~ 35°C / Non operation temperature: -40°C ~ 70°C
Humidity	Non operation humidity: 20% ~ 90% ( Non condensing)

B450D4U-V1L (BTO)
Micro-ATX (9.6'' x 9.6'')
Supports AMD Ryzen™ 2000 Series Desktop Processors
Supports AMD Ryzen™ 2000 G-Series Desktop Processors with Radeon™ Graphics
Supports 3rd Gen AMD Ryzen™ Desktop Processors
Supports 4 DIMM (2DPC)
1 PCIe3.0 x16/x8, 1 PCIe3.0 x8/x0, 1 PCIe3.0 x4
1 M.2
4 SATA 6Gb/s
Supports 1 RJ45 (1GbE) by Intel® i210

Specifications

Physical Status
Form Factor	Micro-ATX
Dimensions	9.6'' x 9.6'' (244 mm x 244 mm)
Processor System
CPU	AMD Ryzen™ 2000 Series Desktop Processors AMD Ryzen™ 2000 G-Series Desktop Processors with Radeon™ Graphics 3rd Gen AMD Ryzen™ Desktop Processors
Socket	AM4 PGA 1331
Chipset	AMD B450
System Memory
Supported DIMM Quantity	4 DDR4 DIMM slots (2DPC)
Supported Type	DDR4 288-pin ECC/non-ECC UDIMM For AMD Ryzen Desktop Processors with Radeon Graphics, ECC support is only with Processors with PRO technologies.
Max. Capacity per DIMM	Up to 64GB per DIMM
Max. DIMM Frequency	Up to 2933 MT/s SR: Single rank DIMM, 1Rx4 or 1Rx8 on DIMM module label DR: Dual rank DIMM, 2Rx4 or 2Rx8 on DIMM module label
Voltage	1.2V
PCIe Expansion Slots (SLOT7 close to CPU)
PCIe x 16	SLOT6: PCIe3.0 x16, auto switch to x8 when SLOT4 is occupied SLOT4: PCIe x16 (PCIe3.0 x8) Only reserve for 3^rd Gen AMD Ryzen™ Desktop Processors
PCIe x 8	SLOT5: PCIe x8 (PCIe3.0 x4)
Other PCIe Expansion Connectors
M.2 slot	1 M-key (PCIe2.0 x4), supports 22110/2280/2260/2242 form factor
SATA/SAS Storage
PCH Built-in Storage	AMD B450 (4 SATA 6Gb/s): 3 SATA 7-pin, 1 SATA DOM
Ethernet
Interface	1000 /100 /10 Mbps
Additional GbE Controller	Intel^® i210: 1 RJ45 (1GbE) Supports Wake-On-LAN Supports Energy Efficient Ethernet 802.3az Supports PXE
Graphics
Controller	ASPEED AST2510
VRAM	DDR4 512MB (256Mx16)
Rear I/O
VGA Port	1 DB15
USB 3.2 Gen1 Port	2 Type-A (USB3.2 Gen1)
RJ45	1 RJ45 (1GbE)
Internal Connector/Headers
Power Connector	1 (24-pin, ATX main power), 1 (8-pin, ATX 12V)
Auxiliary Panel Header	1 (18-pin): chassis intrusion, system fault LED, LAN1/LAN2 activity LED, locate, SMBus
System Panel	1 (9-pin): power switch, reset switch, system power LED, HDD activity LED
Buzzer	1
Fan Header	6 (4-pin)
TPM Header	1 (17-pin, LPC)
Clear CMOS	1
USB 3.2 (Gen1) Header	1 (19-pin, 2 USB3.2 Gen1)
LED Indicators
Standby PWR LED	1
80 Debug Port LED	1
Fan Fail LED	6
BMC heartbeat LED	1
System BIOS
BIOS Type	128Mb AMI UEFI Legal BIOS
BIOS Features	Plug and Play (PnP) ACPI 2.0 Compliance Wake Up Events SMBIOS 2.8.0 Support ASRock Rack Instant Flash
Hardware Monitor
Temperature	CPU/DDR temperature sensing MB/Card side temperature sensing
Fan	Fan Tachometer Quiet Fan (Allow Chassis Fan Speed Auto-Adjust by CPU Temperature) Fan Multi-Speed Control
Voltage	Voltage Monitoring: CPU, DDR4, 3v/5v/12v,+1.05V_PCH, +BAT, 3VSB, 5VSB
Environment
Temperature	Operation temperature: 10°C ~ 35°C / Non operation temperature: -40°C ~ 70°C

B550D4ID-2L2T (BTO)
Deep mini-ITX (6.7" x 8.2")
Support AMD Ryzen 5000 Series Desktop Processors
4 DIMM slots (2DPC), supports DDR4 ECC/non-ECC UDIMM
1 PCIe4.0 x16
1 OCuLink (4 SATA 6Gb/s)
Supports 1 M.2 (PCIe4.0 x4 or SATA 6Gb/s)
4 SATA 6Gb/s
2 RJ45 (10GbE) by Intel® X710
2 RJ45 (1GbE) by Intel® i210
Supports ATX PSU and 12V DC-in
Remote management (IPMI)

Specifications

Physical Status
Form Factor	Deep mini-ITX
Dimensions	6.7" x 8.2"
Processor System
CPU	Supports: AMD Ryzen™ 5000 and 4000 G-Series Desktop Processors with Radeon™ Graphics AMD Ryzen™ 5000 and 3000 Series Desktop Processors AMD Ryzen™ PRO 5000, 4000 and 3000* Series Desktop Processors * Not compatible with AMD Ryzen™ PRO 3000 Series Desktop Processors with Radeon™ Graphics
Socket	Single Socket AM4 (PGA1331)* *Please note that this motherboard only supports LGA115x CPU heatsink.
Chipset	AMD B550
System Memory
Supported DIMM Quantity	4 DIMM slots (2DPC)
Supported Type	Supports DDR4 288-pin ECC/non-ECC UDIMM For AMD Ryzen Desktop Processors with Radeon Graphics, ECC support is only with Processors with PRO technologies.
Max. Capacity per DIMM	ECC/non-ECC UDIMM: up to 32GB
Max. DIMM Frequency	up to 3200 MHz* * AMD Ryzen™ 3000 G-Series Desktop Processors with Radeon™ Graphics support up to 2666 MHz
Voltage	1.2V
PCIe Expansion Slots (SLOT7 close to CPU)
PCIe x 16	SLOT7: PCIe4.0* x16 [CPU] *Supports PCIe3.0 when using AMD Ryzen™ 5000, 4000 G-Series Desktop Processors with Radeon™ Graphics
Other PCIe Expansion Connectors
M.2 slot	1 M-key (PCIe4.0 x4* or SATA 6Gb/s), supports 22110 (BTO)/2280 form factor [CPU] 1 M-key (PCIe3.0 x2 or SATA 6Gb/s), supports 2280 form factor (BTO)* [FCH] Supports PCIe3.0 when using AMD Ryzen™ 5000, 4000 G-Series Desktop Processors with Radeon™ Graphics * M2_1 22110 form factor support is possible by depopulating BMC_SMB and IPMB header and other BOM change *** M2_2 support is possible by depopulating BMC_SMB and IPMB header and other BOM change
OCuLink	1 OCuLink (4 SATA 6Gb/s) [FCH]
SATA/SAS Storage
PCH Built-in Storage	AMD B550 (4 SATA 6Gb/s; RAID 0/1/10): 1 OCuLink
Ethernet
Additional GbE Controller	1 Intel^® X710-AT2: 2 RJ45 (10GbE) 2 Intel^® I210: 2 RJ45 (1GbE)
Server Management
BMC Controller	ASPEED AST2500
IPMI Dedicated GLAN	1 x Realtek RTL8211E for dedicated management GLAN
Graphics
Controller	ASPEED AST2500: 1 DB15 AMD Ryzen™ Desktop Processors with Radeon™ Graphics: 1 HDMI
Rear I/O
UID Button/LED	1 UID button, 1 UID LED
VGA Port	1 DB15, 1 HDMI
USB 3.2 Gen1 Port	2 Type-A (USB3.2 Gen1)
RJ45	2 RJ45 (10GbE), 2 RJ45 (1GbE) 1 dedicated IPMI
Internal Connector/Headers
Power Connector	1 (4-pin, ATX PSU signal) w/ ATX 24-pin adapter cable, 2 (8-pin, ATX 12V) support 12V DC-in
Other Power Connectors	1 (4-pin) for HDD power when using 12V DC-in power source
Auxiliary Panel Header	1 (9-pin): chassis intrusion, system fault LED, LAN activity LED
System Panel	1 (9-pin): power switch, reset switch, system power LED, HDD activity LED
COM Header	1
Speaker Header	1
Fan Header	3 (4-pin)
Thermal Sensor Header	1
TPM Header	1 (17-pin, LPC), 1 (13-pin, SPI)
SMBus header	1
PMBus header	1
IPMB Header	1
Clear CMOS	1
USB 3.2 (Gen1) Header	1 (19-pin, 2 USB3.2 Gen1)
NMI Header	1
NC-SI	1
LED Indicators
Standby PWR LED	1
80 Debug Port LED	1
Fan Fail LED	3
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
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
Environment
Temperature	Operation temperature: 10°C ~ 35°C / Non operation temperature: -40°C ~ 70°C
Humidity	Non operation humidity: 20% ~ 90% ( Non condensing)