AsRockRack B550D4-4L key features:
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| Physical Status | |
| Form Factor | ATX |
| Dimensions | |
| 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 |
| Storage | |
| 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) |
| Ethernet | |
| Additional GbE Controller | 4 Intel® i210: 4 RJ45 (1 GbE) |
| 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 APU: 1 HDMI |
| Rear Panel I/O | |
| HDMI | 1 |
| 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 |
| PMBus CONN | 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 |
| Environment | |
| 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.
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