Flopper.io GPU Comparison Sheet
NVIDIA GB300 Grace Blackwell Ultra Desktop Superchip 252GB vs NVIDIA B300 SXM 288GB
Side by side datacenter GPU specifications from the Flopper.io database.
Overview
| NVIDIA GB300 Grace Blackwell Ultra Desktop Superchip 252GB | NVIDIA B300 SXM 288GB | |
|---|---|---|
| FP32 TFLOPS | 80.0 | 75.0 |
| VRAM | 252 GB | 288 GB |
| Memory Bandwidth | 7.1 TB/s | 8.0 TB/s |
| TDP | — | 1.4 kW |
Performance by Precision
| Precision | NVIDIA GB300 Grace Blackwell Ultra Desktop Superchip 252GB peak TFLOPS (dense) | NVIDIA B300 SXM 288GB peak TFLOPS (dense) |
|---|---|---|
| INT8 | 165.0 | 187.5 |
| FP8 | 5000.0 | 4500.0 |
| FP4 | 15000.0 | 13500.0 |
| FP16 | 2500.0 | 2250.0 |
| BF16 | 2500.0 | 2250.0 |
| TF32 | 1250.0 | 1125.0 |
| FP32 | 80.0 | 75.0 |
| FP64 | 1.3 | 1.3 |
| FP6 | 5000.0 | 4500.0 |
Specifications
| NVIDIA GB300 Grace Blackwell Ultra Desktop Superchip 252GB | NVIDIA B300 SXM 288GB | |
|---|---|---|
| Architecture | Blackwell Ultra | Blackwell Ultra |
| Process Node | 4nm | 4nm |
| Launch Year | 2025 | 2025 |
| Form Factor | Superchip | SXM |
| Memory Type | HBM3e | HBM3e |
| Interface Width | — | — |
| Interconnect | NVLink-C2C | — |
| TDP | — | 1.4 kW |
| FP32 Efficiency | — | 0.05 TFLOPS/W |