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Silver 2U rackmount chassis with front drive bays and rear expansion slots

Supermicro

Supermicro ARS-221GL-NR 2U barebone server 144-core Grace CPU 480GB LPDDR5X 4 GPU support

SKU CH-7H6P-909Y4 MPN ARS-221GL-NR

2U barebone server with 144-core Grace CPU, 480GB LPDDR5X and support for four GPUs

  • High-density 2U design fits up to four GPUs in a compact rack space
  • 144-core Grace CPU superchip delivers massive parallel performance for AI workloads
  • 480 GB LPDDR5X onboard memory provides high bandwidth with low latency
  • Seven PCIe 5.0 x16 full-height slots enable flexible accelerator configurations
  • BlueField-3 DPU support offloads networking and storage tasks from the CPU

High-density 2U GPU server

The Supermicro ARS-221GL-NR is a 2U barebone server built around the NVIDIA Grace CPU Superchip with 144 cores and 480GB of onboard LPDDR5X memory. It targets organisations deploying large-scale AI training or high-performance computing workloads that demand maximum memory bandwidth in a compact rack footprint.

Four GPU support with NVLink

The chassis provides seven PCIe 5.0 x16 full-height full-length slots and is validated for up to four NVIDIA H100 PCIe GPUs connected via NVLink bridges. This topology enables direct GPU-to-GPU communication while the Grace Superchip handles host duties, reducing latency for multi-GPU training jobs.

Suits AI clusters needing dense GPU compute

Buyers who require a self-contained 2U node with integrated CPU memory and multi-GPU NVLink connectivity will match this platform. Teams needing more than four GPUs per node, alternative accelerator form factors, or discrete system memory channels should evaluate other configurations.

How it compares

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

Price $3,915.99
Pricier than about 70% of the 532 comparable items (median $2,503.49).

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Specifications

Size & build
Shipping weight39.24 kg
Package size1156 × 572 × 279 mm

Questions about this item

Will the onboard 480GB LPDDR5X memory ever need to be replaced or upgraded?

The 480GB LPDDR5X memory is soldered directly onto the board and cannot be removed or upgraded by the user.

Which component reaches its limit first when all four GPU slots run sustained workloads?

The system supports up to 4 NVIDIA H100 PCIe GPUs connected via NVLink bridges, and the 7 PCIe 5.0 x16 slots define the maximum GPU expansion ceiling.

How much heat and fan noise should I expect when this 2U server runs all day with four GPUs installed?

The 2U chassis houses 144 Grace CPU cores plus four full-height GPUs, so sustained operation produces significant heat that requires high airflow cooling.

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