Supermicro SYS-421GE-TNHR2-LCC barebone server 8 GPU liquid-cooled

4U Liquid-Cooled 8-GPU Barebones

The Supermicro SYS-421GE-TNHR2-LCC is a 4U barebones server designed for liquid-cooled NVIDIA HGX H100 or H200 eight-GPU configurations. It supports dual 5th or 4th Gen Intel Xeon Scalable processors and provides 32 DDR5 DIMM slots for up to 8 TB of 5600 MT/s ECC memory. The platform targets high-density AI training and HPC clusters.

Suited for dense GPU compute.

This system suits organisations deploying large-scale AI models that require eight liquid-cooled GPUs with full PCIe Gen 5.0 x16 bandwidth per card. It is not intended for workloads needing extensive internal storage expansion beyond the eight 2.5-inch hot-swap NVMe bays and two M.2 NVMe boot devices, nor for builds requiring multiple additional PCIe add-in cards beyond the sixteen lanes allocated to GPUs.

Dual-socket Xeon platform with direct liquid cooling

The chassis integrates a liquid-cooling loop for the HGX GPU baseboard, removing the need for high-airflow fans and freeing rack space for density. Eight PCIe Gen 5.0 x16 low-profile slots connect the GPUs directly to the CPU root complexes. Two additional full-height Gen 5.0 x16 slots remain available for networking or storage controllers. Eight 2.5-inch hot-swap NVMe bays and two M.2 NVMe slots handle boot and active datasets, while optional 2.5-inch SATA bays can be added for secondary storage tiers.