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Silver 5U rackmount server chassis front panel with drive bays and fan vents

Supermicro

Supermicro SYS-521GE-TNRT 5U rackmount barebone server

SKU CH-BAGN-427CH MPN SYS-521GE-TNRT

5U barebone for AI/HPC with dual Xeon sockets, 32 DDR5 slots, 13 PCIe 5.0 x16 slots, 10 GPU capacity and 2.5" hot-swap bays

  • Form Factor5U Rackmount
  • WorkloadAI/ML/HPC
  • CPU TypeIntel Xeon
  • CPU SocketLGA 4677
  • Installed CPUNo CPU Installed
  • Max Processors2
  • Supports up to 10 double-width GPUs for massive AI compute
  • 13 PCIe 5.0 x16 slots give maximum expansion headroom
  • 32 DDR5 4800 ECC DIMM slots scale memory to 8 TB
  • Four 2700 W titanium redundant supplies ensure continuous power
  • 5U chassis fits 8 hot-swap 2.5" NVMe, SATA or SAS bays

AI/ML/HPC barebone server

The Supermicro SYS-521GE-TNRT is a 5U rackmount barebone designed for AI, machine-learning and high-performance computing clusters. It ships without processors, memory or storage, allowing integrators to configure up to two Intel Xeon Scalable CPUs and populate 32 DDR5 4800 ECC DIMM slots for up to 8 TB of memory.

Sustained thermal headroom

Eight hot-swap heavy-duty fans with optimal speed control move air across dual 350 W TDP CPUs and up to ten double-width GPUs without throttling during extended training runs. Four 2700 W titanium redundant power supplies in a 2+2 arrangement maintain stable delivery when every PCIe 5.0 x16 slot is saturated.

Integration constraints

The chassis provides 13 full-height PCIe 5.0 x16 slots, dual M.2 NVMe sockets and front-access 2.5-inch hot-swap bays for SATA, SAS or NVMe drives. Installers must source a CPU cooler rated for 350 W, cable the dual-root PCIe switch for GPU direct interconnects and add an optional NVLink bridge for multi-GPU scaling.

Highlights

  • Supports up to 10 double-width GPUs for massive AI compute
  • 13 PCIe 5.0 x16 slots give maximum expansion headroom
  • 32 DDR5 4800 ECC DIMM slots scale memory to 8 TB
  • Four 2700 W titanium redundant supplies ensure continuous power
  • 5U chassis fits 8 hot-swap 2.5" NVMe, SATA or SAS bays

Specifications

BrandSUPERMICRO
ModelSYS-521GE-TNRT
Form Factor5U Rackmount
WorkloadAI/ML/HPC
CPU TypeIntel Xeon
CPU SocketLGA 4677
Installed CPUNo CPU Installed
Max Processors2
CPU Features4th Gen Intel Xeon Scalable processors
Future support for the upcoming 5th Gen Intel Xeon processors
Supports up to 350W TDP CPUs (Air Cooled)
Supports up to 350W TDP CPUs (Liquid Cooled)
North BridgeIntel C741
Memory Slots32 x 288Pin
Installed Memory SizeNo Memory Installed
Max Memory SupportedUp to 8TB: 32 x 256 GB DRAM
Memory Type SupportedDDR5 4800
ECC SupportedYes
Installed HDDNo Storage Installed
M.22 x M.2 NVMe
GPU/VPUMax GPU Count: Up to 10 double-width or 10 single-width GPU(s)
Supported GPU: NVIDIA PCIe: A100, L40S, H100
CPU-GPU Interconnect: PCIe 5.0 x16 Switch Dual-Root
GPU-GPU Interconnect: NVIDIA NVLink Bridge (optional)
PCI Express12 x PCIe 5.0 x16 FHFL slot(s)
1 x PCIe 5.0 X16 FHFL slot(s)
First LANIntel X710-AT2
Max. LAN Speed10 Gigabit
Hot-Swap Bays24 x 2.5" hot-swap NVMe/SATA/SAS drive bays (8x 2.5" NVMe hybrid; 8x 2.5" NVMe dedicated)
VGA1
RJ452
Max. Power2700W Redundant Titanium Level power supplies
TemperatureOperating Temperature: 10°C ~ 35°C (50°F ~ 95°F)
Non-operating Temperature: -40°C to 60°C (-40°F to 140°F)
HumidityOperating Relative Humidity: 8% to 90% (non-condensing)
Non-operating Relative Humidity: 5% to 95% (non-condensing)
FeaturesCryptographically Signed Firmware
Secure Boot
Secure Firmware Updates
Automatic Firmware Recovery
Supply Chain Security: Remote Attestation
Runtime BMC Protections
System Lockdown
Dimensions8.75" x 17.2" x 29"
Weight65.5 lbs.
Shipping weight45.36 kg
Package size1041 × 686 × 675 mm

Questions about this item

How loud and hot does the 5U chassis get with all eight heavy-duty fans running continuously?

Eight hot-swap fans with optimal speed control adjust airflow to the thermal load, keeping dual 350W CPUs and up to ten GPUs within limits during sustained AI/ML/HPC workloads.

Which CPUs, memory and GPUs must I supply because the barebone ships without them?

You must add up to two LGA 4677 Xeon Scalable processors, DDR5 4800 ECC RDIMMs for the 32 DIMM slots, and NVIDIA PCIe A100, L40S or H100 GPUs for the 13 PCIe 5.0 x16 slots.

Will my existing PCIe 4.0 storage and networking cards work in the 13 PCIe 5.0 x16 slots?

Yes, the 12 plus 1 PCIe 5.0 x16 full-height full-length slots are backward compatible with PCIe 4.0 and 3.0 cards, so older NVMe, SAS or NIC add-in cards will function at their rated speeds.

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