NVIDIA GB300 NVL72 Infrastructure & Deployment_
Leviathan Systems is actively deploying GB300 NVL72 infrastructure for hyperscale AI training facilities in the United States. This is current, hands-on deployment experience with the latest generation of NVIDIA's rack-scale AI systems.
What Is the NVIDIA GB300 NVL72?_
The NVIDIA GB300 NVL72 is the Blackwell Ultra evolution of the GB200 NVL72. It replaces the B200 GPU with the B300 GPU, upgrading memory from 192 GB to 288 GB HBM3e per GPU through 12-high HBM stacks (vs. 8-high on B200). The result is 1.5x more AI performance than the GB200 NVL72 in the same rack footprint.
Leviathan Systems is actively deploying GB300 NVL72 infrastructure for hyperscale AI training facilities in the United States. This is current, hands-on deployment experience with the latest generation of NVIDIA's rack-scale AI systems.
GB300 NVL72 Infrastructure Specifications_
| Specification | GB300 NVL72 |
|---|---|
| GPUs per Rack | 72 Blackwell Ultra B300 GPUs |
| CPUs per Rack | 36 Grace CPUs |
| Memory per GPU | 288 GB HBM3e (12-high stacks) |
| Rack Power | ~120 kW (same envelope as GB200) |
| Interconnect | NVLink 5.0, 1.8 TB/s per GPU, 130 TB/s total |
| Compute Performance | ~1.1 exaFLOPS FP4 per rack |
| Weight | ~1,360 kg (3,000 lbs) |
| Cooling | 100% direct liquid cooling (mandatory) |
| Power Architecture | Supports new 800V DC distribution |
What Changes from GB200 to GB300?_
The physical rack form factor is identical. The GB300 NVL72 fits in the same space, uses the same cooling infrastructure, and presents the same mechanical interface as the GB200 NVL72. The changes are inside the compute trays: each tray now holds four B300 GPUs (vs. two B200 GPUs in GB200), paired with two Grace CPUs.
288 GB HBM3e per GPU means 20.7 TB total GPU memory per rack (vs. 13.8 TB for GB200). Larger models can be trained on fewer racks.
The GB300 introduces support for 800V DC power distribution, which reduces conductor losses and cable mass. This is forward-looking -- most current facilities still run 415V AC -- but new builds should plan for it.
The thermal envelope is unchanged. CDU capacity, manifold design, and facility water loop specifications carry over from GB200 deployments.
How Leviathan Deploys GB300_
Verify power capacity, cooling infrastructure, and floor loading for 120 kW racks.
Server placement, NVLink 5.0 domain wiring, power cabling, and PDU connections.
CDU connection, manifold routing, quick-disconnect installation, leak detection, pressure testing.
OTDR fiber testing, interconnect verification, POST checks, thermal validation, and handoff.
Ready to Deploy Your GPU Infrastructure?_
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