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GPU Specification Sheet
July 15, 2026
flopper.io/gpu/nvidia-gb300-grace-blackwell-ultra-superchip-252gb
NVIDIA GB300 Grace Blackwell Ultra Superchip 252GB
Blackwell Ultra
Superchip
2025
4nm
Overview
80.0
FP32 TFLOPS
252 GB
VRAM HBM3e
7.1 TB/s
Memory Bandwidth
—
TDP
Performance Metrics
Precision
Peak TFLOPS
Bits
Type
FP6
5000.0
—
Standard
FP8
5000.0
8
Standard
FP4
10000.0
4
Standard
FP16
2500.0
16
Standard
BF16
2500.0
16
Standard
TF32
1250.0
32
Standard
FP32
80.0
32
Standard
FP64
1.3
64
Standard
Memory Specifications
Capacity
252 GB
Type
HBM3e
Bandwidth
7.1 TB/s
Interface Width
—
Power & Efficiency
TDP
—
Est. Max Power
—
FP32 Efficiency
—
FP16 Efficiency
—
Hardware Details
Vendor:
NVIDIA
Architecture:
Blackwell Ultra
Process Node:
4nm
Form Factor:
Superchip
Launch Year:
2025
Variant:
Grace Blackwell Ultra Superchip 252GB
Interconnect
GPU-to-GPU:
NVLink-C2C
Bandwidth:
900 GB/s