NVIDIA
NVIDIA GB300 NVL72 72-GPU Rack (Lenovo 48U MGX)
NVIDIA GB300 NVL72 rack-scale GPU system — 72 Blackwell Ultra GPUs and 36 Grace CPUs on the Lenovo 48U MGX reference rack, factory-integrated with direct water cooling.
NVIDIA GB300 NVL72 rack-scale GPU system, built on the Lenovo 48U MGX reference rack. Seventy-two Grace Blackwell Ultra GPUs and 36 Grace CPUs are packaged at a 1:2 CPU:GPU pairing with roughly 20.7 TB of HBM3e per rack, connected over fifth-generation NVLink across nine switch trays for rack-scale AI training and inference. Factory-integrated and direct-water-cooled. Configuration and availability confirmed at quote.
Specifications
| GPU architecture | NVIDIA GB300 (Grace Blackwell Ultra) |
|---|---|
| GPUs per rack | 72× GB300 (18 compute trays, 4 GPUs per tray) |
| GPU memory | 288 GB HBM3e per GPU (≈20.7 TB per rack) |
| CPU | 36× NVIDIA Grace (2 per tray) · 1:2 CPU:GPU pairing |
| NVLink fabric | 5th-gen NVLink · 1.8 TB/s per GPU · 130 TB/s all-to-all in-rack · 9× NVLink Switch Trays |
| Scale-out networking | ConnectX-8 SuperNIC · 800 Gb/s per GPU · Quantum-X800 InfiniBand / Spectrum-X |
| Form factor | 48U liquid-cooled MGX rack, factory-integrated |
| Cooling | Direct Water Cooling (DWC), rack + per-tray |
| Rack power | ≈132–140 kW per rack (liquid-cooled) |
| Rack weight | ≈1.36 t (≈3,000 lb) per rack |
| Condition | New |
| Warranty | 3-yr Lenovo Premier Next Business Day |
Specifications shown are headline figures. Confirm full configuration details when you request a quote.
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