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Supermicro 1U 2-node barebone server, matte black chassis with front drive bays and rear I/O ports

Supermicro

Supermicro ARS-121L-DNR 1U 2-Node barebone server

SKU CH-91EJ-G3B0J MPN ARS-121L-DNR

A 1U barebone holding two nodes, each with an NVIDIA Grace CPU Superchip, 480 GB LPDDR5X memory, two PCIe 5.0 x16 slots and up to four E1.S NVMe drives

  • Two-node density fits 1U rack space
  • Grace CPU Superchip delivers 900 GB/s chip interconnect
  • 480 GB LPDDR5X memory per node onboard
  • PCIe 5.0 x16 slots take BlueField-3 or ConnectX-7
  • Four E1.S hot-swap bays plus two M.2 NVMe per node

Dense dual-node 1U server

The Supermicro ARS-121L-DNR is a 1U barebone system that fits two independent compute nodes. Each node is built around an NVIDIA Grace CPU Superchip and targets high-density inference or HPC clusters. It is for integrators who need maximum throughput per rack unit.

Firmware-limited drive support

Installation follows standard 1U rail mounting and hot-swap drive carrier procedures. A pending firmware fix currently limits each node to four E1.S drives and two GPUs instead of the full complement. Buyers who need the full drive count today should verify the fix timeline before deployment.

480GB LPDDR5X per node

Each node provides up to 480GB of onboard LPDDR5X memory with a 900GB/s NVLink C2C interconnect between the two CPUs. This capacity and bandwidth combination decides whether the system fits a specific model size or dataset. Builders who need more memory per socket must choose a different platform.

How it compares

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

Price $30,219.99
Pricier than about 90% 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

Size & build
Shipping weight20.87 kg
Package size1219 × 711 × 198 mm

Questions about this item

How do I verify the NVLink interconnect is running at 900GB/s after setup?

Check the system firmware or NVIDIA management tools for the reported NVLink Chip-2-Chip link speed; it should read 900GB/s when the Grace CPU Superchips are communicating correctly.

What comes with the ARS-121L-DNR barebone and what must I source separately?

The barebone includes the 1U chassis, dual-node motherboards with onboard LPDDR5X memory, PCIe 5.0 x16 slots, E1.S and M.2 drive bays, and seven hot-swap fans; you must add NVIDIA BlueField-3 or ConnectX-7 cards, E1.S NVMe drives, and M.2 NVMe drives.

Which memory capacity should I choose for each node?

Each node provides up to 480GB of onboard LPDDR5X memory; select the configuration that matches your workload capacity requirement.

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