Flopper.io System Specification Sheet
October 9, 2026
flopper.io/system/nvidia-dgx-gb300-nvl72NVIDIA DGX GB300 NVL72
72x GB300 Blackwell Ultra rack 2025
Overview
360
FP8 PFLOPS Dense
20.7 TB
Aggregate Memory
576.0 TB/s
Aggregate Bandwidth
142.0 kW
Aggregate Power
Performance Metrics
| Precision | Peak (PFLOPS) | Per GPU (TFLOPS) | TFLOPS/W |
|---|---|---|---|
| FP64 | 0.10 | 1.4 | — |
| FP32 | 6.00 | 83 | — |
| TF32 | 90.0 | 1,250 | — |
| FP16 | 180 | 2,500 | — |
| BF16 | 180 | 2,500 | — |
| FP8 | 360 | 5,000 | — |
| FP4 | 1,080 | 15,000 | — |
| INT8 | 12.0 | 167 | — |
| FP6 | 360 | 5,000 | — |
All figures are dense. Vendors commonly headline the sparse number, which is twice the dense one.
Configuration
- Accelerator
- GB300 NVL72 GPU 288GB
- Count
- 72
- Memory per GPU
- 288 GB
- Bandwidth per GPU
- 8.0 TB/s
Power & Efficiency
- Aggregate Power
- 142.0 kW
- TDP per GPU
- —
- FP8 Efficiency
- 2.54 TFLOPS/W
- Aggregate Bandwidth
- 576.0 TB/s
System Details
Vendor: NVIDIA
Family: NVL
Architecture: Blackwell Ultra
Form Factor: rack
Release Year: 2025
Process Node: 4nm
Interconnect
NVLink + NVSwitch
Notes
NVIDIA's own build of the GB300 NVL72 reference rack: 36 GB300 superchips, 72 Blackwell Ultra GPUs and 36 Grace CPUs, joined into one NVLink domain in a liquid-cooled rack.