Flopper.io System Specification Sheet
August 10, 2026
flopper.io/system/nvidia-dgx-gb300-nvl72NVIDIA DGX GB300 NVL72
72x B300 Blackwell Ultra rack 2025
Overview
360
FP8 PFLOPS Dense
20.7 TB
Aggregate Memory
576.0 TB/s
Aggregate Bandwidth
—
Aggregate Power
Performance Metrics
| Precision | Peak (PFLOPS) | Per GPU (TFLOPS) | TFLOPS/W |
|---|---|---|---|
| FP32 | 6.0 | 83.3 | — |
| TF32 | 90.0 | 1250.0 | — |
| FP16 | 180.0 | 2500.0 | — |
| BF16 | 180.0 | 2500.0 | — |
| FP8 | 360.0 | 5000.0 | — |
| FP4 | 1080.0 | 15000.0 | — |
All figures are dense. Vendors commonly headline the sparse number, which is twice the dense one.
Configuration
- Accelerator
- B300 SXM 288GB
- Count
- 72
- Memory per GPU
- 288 GB
- Bandwidth per GPU
- 8.0 TB/s
Power & Efficiency
- Aggregate Power
- —
- TDP per GPU
- 1400 W
- FP8 Efficiency
- —
- 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
36 GB300 superchips (72 B300 GPUs + 36 Grace CPUs) in liquid-cooled rack