NVIDIA DGX Spark vs NVIDIA H20
Side-by-side comparison of specifications, performance, and efficiency.
NVIDIA DGX Spark
Architecture
Grace Blackwell
Year
2025
VRAM
128 GB
TDP
240 W
NVIDIA H20
Architecture
Hopper
Year
2024
VRAM
96 GB
TDP
400 W
Specifications
NVIDIA DGX Spark NVIDIA H20
Architecture
Grace Blackwell Hopper
Launch Year
2025 2024
Form Factor
Desktop Workstation SXM
VRAM
128 GB96 GB
Memory Bandwidth
273 GB/s4.0 TB/s
TDP
240 W400 W
Process Node
4nm 4nm
| Spec | NVIDIA DGX Spark | NVIDIA H20 |
|---|---|---|
| Architecture | Grace Blackwell | Hopper |
| Launch Year | 2025 | 2024 |
| Form Factor | Desktop Workstation | SXM |
| VRAM | 128 GB | 96 GB |
| Memory Bandwidth | 273 GB/s | 4.0 TB/s |
| TDP | 240 W | 400 W |
| Process Node | 4nm | 4nm |
Performance (TFLOPS)
NVIDIA DGX Spark NVIDIA H20
FP64
—1.0 TFlops
FP32
—44.0 TFlops
FP16
100.0 TFlops148.0 TFlops
BF16
—148.0 TFlops
INT8
—296.0 TFlops
| Precision | NVIDIA DGX Spark | NVIDIA H20 |
|---|---|---|
| FP64 | — | 1.0 TFlops |
| FP32 | — | 44.0 TFlops |
| FP16 | 100.0 TFlops | 148.0 TFlops |
| BF16 | — | 148.0 TFlops |
| INT8 | — | 296.0 TFlops |
FLOPS by Precision
Efficiency — TDP vs FP32 Performance
Analysis
Most Efficient
NVIDIA
H20
0.11 TFLOPS/W
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