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Supermicro SYS-621BT-HNC8R
Manufacturer P/N: SYS-621BT-HNC8R
Supermicro SYS-621BT-HNC8R: 2U Rackmount enterprise server. Compare processor, memory and expansion requirements; request a configured-system quote.
- Core count
- Up to 64C/128T; Up to 320MB Cache per CPU
- Memory
- Slot Count: 16 DIMM slots Max Memory (1DPC): Up to 4TB 5600MT/s ECC DDR5 RDIMM
- Memory voltage
- 1.1V
- Lan
- 1 RJ45 1 GbE Dedicated BMC LAN port
Pricing, availability, condition, included options and warranty are confirmed in your quotation.
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Technical overview
Details that define the model.
Use the complete part number when reviewing options and system requirements.
| Core count | Up to 64C/128T; Up to 320MB Cache per CPU |
|---|---|
| Memory | Slot Count: 16 DIMM slots Max Memory (1DPC): Up to 4TB 5600MT/s ECC DDR5 RDIMM |
| Memory voltage | 1.1V |
| Lan | 1 RJ45 1 GbE Dedicated BMC LAN port |
| Form factor | 2U Rackmount |
| Height | 3.47" (88 mm) |
| Width | 17.68" (449 mm) |
| Depth | 30.5" (774 mm) |
| Manufacturer | Supermicro |
| System model | SYS-621BT-HNC8R |
| CPU | Dual Socket E (LGA-4677) 5th Gen Intel® Xeon® / 4th Gen Intel® Xeon® Scalable processors Supports Intel Xeon CPU Max Series with high bandwidth memory (HBM) |
| Note | Supports up to 205W TDP CPUs (Air Cooled)* Supports up to 350W TDP CPUs (Liquid Cooled) *Air Cooled CPUs with TDP over 125W only supported under specific conditions. Contact a Supermicro representative for details. |
| SAS | SAS (12Gbps) via Broadcom® 3808; (IT mode) |
| Network Connectivity | Via AIOM |
| USB | 2 USB 3.0 Gen2 Type-A ports (Rear) |
| Video | 1 VGA port |
| BIOS Type | AMI 32MB Flash ROM |
| Software | SuperCloud Composer® (SCC) Supermicro Server Manager (SSM) Supermicro Update Manager (SUM) Supermicro SuperDoctor® 5 (SD5) Super Diagnostics Offline (SDO) Supermicro Thin-Agent Service (TAS) SuperServer Automation Assistant (SAA) New! |
| Power configurations | ACPI/APM Power Management |
| Hardware | Trusted Platform Module (TPM) 2.0 Silicon Root of Trust (RoT) – NIST 800-193 Compliant |
| Features | Cryptographically Signed Firmware Secure Boot Secure Firmware Updates Automatic Firmware Recovery Supply Chain Security: Remote Attestation Runtime BMC Protections System Lockdown |
| Fan | Fans with tachometer monitoring Pulse Width Modulated (PWM) fan connectors Status monitor for speed control |
| Temperature | Monitoring for CPU and chassis environment |
| Operating Systems | ESXi 7.0 U3, ESXi 8.0, Hypervisor 8.2.1, Oracle Linux 9.0, RHEL 9.0, SLES 15 SP4, SLES 15 SP5, Windows Server 2022, Windows Server 2025 |
| Enterprise Solutions | VMWare vSAN |
| Model | CSE-827BQ2-R3K04P |
| Package | 9.76" (H) x 24.65" (W) x 45.28" (D) |
| Weight | Gross Weight: 96.6 lbs (43.8 kg) Net Weight: 66.1 lbs (30 kg) |
| Available Color | Black front & silver body |
| Buttons | Power On/Off button UID button |
| LED | HDD activity LED Network activity LEDs Power status LED Universal Information (UID) LED |
| PCI-Express (PCIe) Configuration | Default 2 PCIe 5.0 x16 LP slots 1 PCIe 5.0 x16 AIOM slot (OCP 3.0 compatible) |
| Drive Bays Configuration | Default: Total 3 bays 2 front hot-swap 3.5" PCIe 5.0 NVMe/SAS drive bays 1 front hot-swap 3.5" PCIe 4.0 NVMe/SAS drive bay |
| M.2 | 2 M.2 PCIe 4.0 x4 NVMe slots (M-key 22110; VROC required for RAID) |
| Fans | Up to 4x 14.9K RPM Heavy Duty 8cm Fan(s) |
| Air Shroud | 4 Air Shrouds |
| Liquid Cooling | Direct to Chip (D2C) Cold Plate (optional) |
| RoHS | RoHS Compliant |
| Environmental Spec. | Operating Temperature: 10°C to 35°C (50°F to 95°F) Non-operating Temperature: -30°C to 60°C (-22°F to 140°F) Operating Relative Humidity: 8% to 80% (non-condensing) Non-operating Relative Humidity: 8% to 90% (non-condensing) |
| Recycle | Return Server-End of Life Product |
Model & application details
Explore this product.
Supermicro · Enterprise Server
SYS-621BT-HNC8R — Memory: Slot Count: 16 DIMM slots Max Memory (1DPC): Up to 4TB 5600MT/s ECC DDR5 RDIMM; Form Factor: 2U Rackmount.
Quotation on request · Exact BOM and availability confirmed before ordering.
Form factor2U Rackmount
Processor supportDual Socket E (LGA-4677) 5th Gen Intel® Xeon® / 4th Gen Intel® Xeon® Scalable processors Supports Intel Xeon CPU Max Series with high bandwidth memory (HBM)
Width17.68" (449 mm)
Height3.47" (88 mm)
Depth30.5" (774 mm)
Product classEnterprise Server
Manufacturer specifications
SYS-621BT-HNC8R platform details
This model appears in the manufacturer system matrix. Confirm current orderability, condition and the supplied configuration with your quotation.
| Manufacturer | Supermicro |
|---|---|
| System model | SYS-621BT-HNC8R |
| CPU | Dual Socket E (LGA-4677) 5th Gen Intel® Xeon® / 4th Gen Intel® Xeon® Scalable processors Supports Intel Xeon CPU Max Series with high bandwidth memory (HBM) |
| Core Count | Up to 64C/128T; Up to 320MB Cache per CPU |
| Note | Supports up to 205W TDP CPUs (Air Cooled)* Supports up to 350W TDP CPUs (Liquid Cooled) *Air Cooled CPUs with TDP over 125W only supported under specific conditions. Contact a Supermicro representative for details. |
| Memory | Slot Count: 16 DIMM slots Max Memory (1DPC): Up to 4TB 5600MT/s ECC DDR5 RDIMM |
| Memory Voltage | 1.1V |
| SAS | SAS (12Gbps) via Broadcom® 3808; (IT mode) |
| Network Connectivity | Via AIOM |
| LAN | 1 RJ45 1 GbE Dedicated BMC LAN port |
| USB | 2 USB 3.0 Gen2 Type-A ports (Rear) |
| Video | 1 VGA port |
| BIOS Type | AMI 32MB Flash ROM |
| Software | SuperCloud Composer® (SCC) Supermicro Server Manager (SSM) Supermicro Update Manager (SUM) Supermicro SuperDoctor® 5 (SD5) Super Diagnostics Offline (SDO) Supermicro Thin-Agent Service (TAS) SuperServer Automation Assistant (SAA) New! |
| Power configurations | ACPI/APM Power Management |
| Hardware | Trusted Platform Module (TPM) 2.0 Silicon Root of Trust (RoT) – NIST 800-193 Compliant |
| Features | Cryptographically Signed Firmware Secure Boot Secure Firmware Updates Automatic Firmware Recovery Supply Chain Security: Remote Attestation Runtime BMC Protections System Lockdown |
| CPU | 8+4 Phase-switching voltage regulator Monitors for CPU Cores, Chipset Voltages, Memory. |
| Fan | Fans with tachometer monitoring Pulse Width Modulated (PWM) fan connectors Status monitor for speed control |
| Temperature | Monitoring for CPU and chassis environment |
| Operating Systems | ESXi 7.0 U3, ESXi 8.0, Hypervisor 8.2.1, Oracle Linux 9.0, RHEL 9.0, SLES 15 SP4, SLES 15 SP5, Windows Server 2022, Windows Server 2025 |
| Enterprise Solutions | VMWare vSAN |
| Form Factor | 2U Rackmount |
| Model | CSE-827BQ2-R3K04P |
| Height | 3.47" (88 mm) |
| Width | 17.68" (449 mm) |
| Depth | 30.5" (774 mm) |
| Package | 9.76" (H) x 24.65" (W) x 45.28" (D) |
| Weight | Gross Weight: 96.6 lbs (43.8 kg) Net Weight: 66.1 lbs (30 kg) |
| Available Color | Black front & silver body |
| Buttons | Power On/Off button UID button |
| LED | HDD activity LED Network activity LEDs Power status LED Universal Information (UID) LED |
| PCI-Express (PCIe) Configuration | Default 2 PCIe 5.0 x16 LP slots 1 PCIe 5.0 x16 AIOM slot (OCP 3.0 compatible) |
| Drive Bays Configuration | Default: Total 3 bays 2 front hot-swap 3.5" PCIe 5.0 NVMe/SAS drive bays 1 front hot-swap 3.5" PCIe 4.0 NVMe/SAS drive bay |
| M.2 | 2 M.2 PCIe 4.0 x4 NVMe slots (M-key 22110; VROC required for RAID) |
| Fans | Up to 4x 14.9K RPM Heavy Duty 8cm Fan(s) |
| Air Shroud | 4 Air Shrouds |
| Liquid Cooling | Direct to Chip (D2C) Cold Plate (optional) |
| RoHS | RoHS Compliant |
| Environmental Spec. | Operating Temperature: 10°C to 35°C (50°F to 95°F) Non-operating Temperature: -30°C to 60°C (-22°F to 140°F) Operating Relative Humidity: 8% to 80% (non-condensing) Non-operating Relative Humidity: 8% to 90% (non-condensing) |
| Recycle | Return Server-End of Life Product |
Manufacturer technical views
Compare configurations
Choose your Supermicro server configuration
Supermicro SYS-621BT-HNC8R: 2U Rackmount enterprise server. Compare processor, memory and expansion requirements; request a configured-system quote.
These specifications describe platform support and expansion options. They do not mean that maximum memory, processors, drives or expansion cards are installed. Review the configured bill of materials for each system.
| Selection criteria | This modelSYS-621BT-HNC8RSupermicro SYS-621BT-HNC8RRequest configuration for SYS-621BT-HNC8R | Compare modelSYS-221BT-HNC8RSupermicro SYS-221BT-HNC8RRequest configuration for SYS-221BT-HNC8R | Compare modelSYS-621BT-HNTRSupermicro SYS-621BT-HNTRRequest configuration for SYS-621BT-HNTR |
|---|---|---|---|
| Processor support | Dual Socket E (LGA-4677) 5th Gen Intel® Xeon® / 4th Gen Intel® Xeon® Scalable processors Supports Intel Xeon CPU Max Series with high bandwidth memory (HBM) | Dual Socket E (LGA-4677) 5th Gen Intel® Xeon® / 4th Gen Intel® Xeon® Scalable processors Supports Intel Xeon CPU Max Series with high bandwidth memory (HBM) | Dual Socket E (LGA-4677) 5th Gen Intel® Xeon® / 4th Gen Intel® Xeon® Scalable processors Supports Intel Xeon CPU Max Series with high bandwidth memory (HBM) |
| Memory support | Slot Count: 16 DIMM slots Max Memory (1DPC): Up to 4TB 5600MT/s ECC DDR5 RDIMM | Slot Count: 16 DIMM slots Max Memory (1DPC): Up to 4TB 5600MT/s ECC DDR5 RDIMM | Slot Count: 16 DIMM slots Max Memory (1DPC): Up to 4TB 5600MT/s ECC DDR5 RDIMM |
| Network connectivity | Via AIOM | Via AIOM | Via AIOM |
| Form factor | 2U Rackmount | 2U Rackmount | 2U Rackmount |
| Expansion slots | Default 2 PCIe 5.0 x16 LP slots 1 PCIe 5.0 x16 AIOM slot (OCP 3.0 compatible) | Default 2 PCIe 5.0 x16 LP slots 1 PCIe 5.0 x16 AIOM slot (OCP 3.0 compatible) | Default 2 PCIe 5.0 x16 LP slots 1 PCIe 5.0 x16 AIOM slot (OCP 3.0 compatible) |
| Drive bays | Default: Total 3 bays 2 front hot-swap 3.5" PCIe 5.0 NVMe/SAS drive bays 1 front hot-swap 3.5" PCIe 4.0 NVMe/SAS drive bay | Default: Total 6 bays 2 front hot-swap 2.5" PCIe 5.0 NVMe/SAS drive bays 4 front hot-swap 2.5" PCIe 4.0 NVMe/SAS drive bays | Default: Total 3 bays 2 front hot-swap 3.5" PCIe 5.0 NVMe/SATA drive bays 1 front hot-swap 3.5" PCIe 4.0 NVMe/SATA drive bay |
Other catalog models are shown for selection planning. A shared family or form factor does not establish component interchangeability. Check the complete P/N, system revision, firmware and requested configuration before ordering.
Model selection & order planning
Order review: SYS-621BT-HNC8R
Supermicro SYS-621BT-HNC8R
- Start with SYS-621BT-HNC8R and list the required processors, memory, storage and network connections.
- Confirm the intended rack or chassis arrangement, power supply and cooling environment.
- Separate chassis hardware, installed options, software and support into quotation line items.
Explore Supermicro enterprise server options
- Supermicro SYS-621BT-HNTRCore count: Up to 64C/128T; Up to 320MB Cache per CPU
- Supermicro SYS-621C-TN12RCore count: Up to 64C/128T; Up to 112.5MB Cache per CPU
- Supermicro SYS-621H-TN12RCore count: Up to 64C/128T; Up to 320MB Cache per CPU
These are other catalog models in this category. Review each model separately; a shared category does not establish interchangeability.
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