Technical specifications
ASRock 4U18N-B550 — Full Technical Specifications
Official datasheet
Original spec sheet © Vendor. Hosted by hardwaresys for buyer reference. Specifications subject to vendor’s published documentation.
Full Specifications
| Form Factor | 4U Rackmount |
| Chassis Model | 4U18N |
| Dimensions | 950 x 438 x 176 mm (37.4" x 17.2" x 6.9") |
| Support Motherboard | B550D4ID/18N |
| Buttons | UID, Power, RESET |
| LEDs | System Fail, LAN1/LAN2, UID, Power |
| I/O Ports | 2 RJ45(1GbE) by Intel® i210; 2 Type-A (USB 3.2 Gen1); 1 DB15; |
| IPMI LAN | 1 dedicated IPMI |
| Internal Side | 2 Fi xed 2.5" NVMe (PCIe4.0 x4) /SATA drive bays (BTO); 1 M-key (PCIe4.0 x4 or SATA 6Gb/s), supports 22110/2280 form factor [CPU]; 1 M-key (PCIe3.0 x2 or SATA 6Gb/s), supports 2280 form factor [FCH] |
| Type | 4 (3+1) RPSU |
| Output Watts | 1600W |
| Efficiency | Platinum |
| AC Input | 100-240V, 50/60Hz |
| Middle | 80x80mm x5 |
| Fail LED | Abnormal(DC on): LED ON (Solid Red); Normal: LED OFF |
| CPU | Supports:; AMD Ryzen™ 5000 and 3000 Series Desktop Processors; AMD Ryzen™ 4000 and 3000 G-Series Desktop Processors with Radeon™ Graphics; AMD Ryzen™ PRO 5000, 4000 and 3000 Series Desktop Processors |
| Socket | AM4 PGA 1331*; *Please note that this motherboard only supports LGA115x CPU heatsink. |
| Chipset | B550 |
| 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 | 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 |
| TPM Support | By optional accessory |
| BMC Controller | ASPEED AST2500 |
| Dedicated IPMI LAN | 1 x Realtek RTL8211E for dedicated management GLAN |
| Controller | ASPEED AST2500 |
| VRAM | DDR4 16MB |
| Output | 1 DB15 (VGA) |
| BIOS Type | 32MB 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 |
| Temperature | CPU Temperature Sensing; System Temperature Sensing |
| Fan | Middle Fan Tachometer; Middle Fan Multi-Speed Control |
| Voltage | Vcpu, +1.8V, +3V,+5V, +12V, BAT, +1.8VSB, +3VSB, +5VSB |
| Temperature | Operating temperature: 10°C ~ 35°C / Non-operating temperature: -40°C ~ 70°C |
| Humidity | - Non-operating humidity: 20% ~ 90% (non-condensing) |
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