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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

  • ProcessorIntel Xeon
  • Graphics processorMax GPU Count: Up to 10 double-width or 10 single-width GPU(
  • Installed RAMNo Memory Installed
  • Form factor5U Rackmount
  • Processor socketLGA 4677
  • Target workloadAI/ML/HPC
  • 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.

How it compares

Measured against everything we stock in Barebone Servers & DIY Kits, at today’s prices. Recalculated every night.

Price $7,241.99
Pricier than about 82% of the 532 comparable items (median $2,503.49).

New to this? Buying server hardware with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameSUPERMICRO
Model nameSYS-521GE-TNRT
Target workloadAI/ML/HPC
Processor
ProcessorIntel Xeon
Processor socketLGA 4677
Preinstalled processorNo CPU Installed
Max supported CPUs2
ChipsetIntel C741
Memory
Installed RAMNo Memory Installed
RAM slots32 × 288Pin
Maximum supported memoryUp to 8 TB: 32 × 256 GB DRAM
Supported memoryDDR5 4800
ECC supportYes
Storage
Preinstalled storageNo Storage Installed
M.2 slots2 x M.2 NVMe
Hot-swap drive bays24 × 2.5 in hot-swap NVMe/SATA/SAS drive bays (8x 2.5 in NVMe hybrid; 8x 2.5 in NVMe dedicated)
Connectivity
Primary LAN controllerIntel X710-AT2
Top LAN speed10 Gigabit
Ports & slots
PCIe slots12 x PCIe 5.0 x16 FHFL slot(s)
1 x PCIe 5.0 X16 FHFL slot(s)
VGA ports1
Ethernet port2
Power
Power supply2700 W Redundant Titanium Level power supplies
Size & build
Form factor5U Rackmount
Product dimensions8.75 in × 17.2 in × 29 in
Product weight65.5 lb (29.7 kg)
Shipping weight45.36 kg
Package size1041 × 686 × 675 mm
Environment & compliance
Temperature rangeOperating Temperature: 10 °C to 35 °C (50 °F to 95 °F)
Non-operating Temperature: -40 °C to 60 °C (-40 °F to 140 °F)
Humidity rangeOperating Relative Humidity: 8% to 90% (non-condensing)
Non-operating Relative Humidity: 5% to 95% (non-condensing)

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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