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 312 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 312 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 312 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 = 0.8 TFLOPS/W.