Flopper.io GPU Specification Sheet
October 17, 2026
flopper.io/gpu/nvidia-gb300-grace-blackwell-ultra-superchip-252gbNVIDIA GB300 Grace Blackwell Ultra Desktop Superchip 252GB
Blackwell Ultra Superchip 2025 4nm
Overview
80.0
FP32 TFLOPS
252 GB
Memory HBM3e
7.1 TB/s
Memory Bandwidth
—
TDP
Performance Metrics
| Precision | Peak (dense) | 2:4 Sparse | Bits | Type |
|---|---|---|---|---|
| FP64 | 1.3 | N/A | 64 | Standard |
| FP32 | 80.0 | N/A | 32 | Standard |
| TF32 | 1250.0 | 2500.0 | 32 | Standard |
| BF16 | 2500.0 | 5000.0 | 16 | Standard |
| FP16 | 2500.0 | 5000.0 | 16 | Standard |
| FP8 | 5000.0 | 10000.0 | 8 | Standard |
| FP6 | 5000.0 | 10000.0 | — | Standard |
| FP4 | 15000.0 | 20000.0 | 4 | Standard |
| INT8 | 165.0 | 330.0 | 8 | Standard |
Memory Specifications
- Capacity
- 252 GB
- Type
- HBM3e
- Bandwidth
- 7.1 TB/s
- Interface Width
- —
Power & Efficiency
- TDP
- —
- Max power
- —
- FP32 dense TFLOPS per W of TDP
- —
- FP16 dense TFLOPS per W of TDP
- —
Per W of TDP figures divide dense peak by accelerator TDP. Board power only: excludes host CPUs, networking, cooling and facility overhead.
Hardware Details
Vendor: NVIDIA
Architecture: Blackwell Ultra
Process Node: 4nm
Form Factor: Superchip
Launch Year: 2025
Variant: Grace Blackwell Ultra Desktop Superchip 252GB
Interconnect
GPU-to-GPU: NVLink-C2C
Bandwidth: 900 GB/s bidirectional, per GPU
Enterprise Features
Sparsity: Yes