Blackwell B200 vs Ampere A100 SXM4
Complete side-by-side comparison of specs, performance, memory, power efficiency, and pricing.
Blackwell B200
89
Spec Wins
Ampere A100 SXM4
61
Detailed Specifications
Blackwell B200 — Best For
Ampere A100 SXM4 — Best For
Who Should Choose Each GPU?
Choose Blackwell B200 if you…
- ✓Need maximum CUDA/TensorRT/vLLM ecosystem compatibility
- ✓Need more VRAM (192GB vs 80GB) for large model inference
- ✓Prioritize raw FP8 throughput (4,500 vs 0 TFLOPS)
- ✓Running Frontier Training workloads
- ✓Running AGI Research workloads
Choose Ampere A100 SXM4 if you…
- ✓Need maximum CUDA/TensorRT/vLLM ecosystem compatibility
- ✓Have power-constrained data centers (400W vs 1000W TDP)
- ✓Working with a tighter CapEx budget (lower list price)
- ✓Running Training workloads
- ✓Running Fine-tuning workloads
Verdict
The Blackwell B200 and Ampere A100 SXM4 target different priorities. The Blackwell B200's 192GB of HBM3e gives it a clear edge for large-model inference where fitting the full model in VRAM eliminates quantization overhead. For training throughput, the Blackwell B200's 4,500 FP8 TFLOPS outpaces the Ampere A100 SXM4's 0 TFLOPS. Both GPUs use CUDA, so ecosystem switching cost is not a factor. Use our TCO Calculator to model the full 3-year cost difference for your specific utilization and power costs.
Blackwell B200 vs Ampere A100 SXM4: Common Questions
Which is faster, Blackwell B200 or Ampere A100 SXM4?+
In FP8 throughput, the Blackwell B200 leads with 4,500 TFLOPS vs 0 TFLOPS. For LLM inference, memory capacity and bandwidth often matter more than raw TFLOPS — the Blackwell B200 has more VRAM (192GB).
Is Blackwell B200 or Ampere A100 SXM4 better for LLM training?+
For LLM training at scale, the Blackwell B200 has higher raw throughput. However, the choice also depends on your software stack: Blackwell B200 offers CUDA compatibility with the widest framework support (PyTorch, JAX, TensorRT).
What is the price difference between Blackwell B200 and Ampere A100 SXM4?+
The Blackwell B200 is estimated at $35,000 per unit and the Ampere A100 SXM4 at $12,000. Actual pricing varies by vendor, volume, and configuration. Check our Buy page for current reseller pricing.
Which GPU is more power efficient, Blackwell B200 or Ampere A100 SXM4?+
The Ampere A100 SXM4 has a lower TDP (400W vs 1000W). Performance-per-watt depends on your workload — for FP8 inference, divide TFLOPS by TDP: Blackwell B200 = 4.5 TFLOPS/W vs Ampere A100 SXM4 = 0.0 TFLOPS/W.