Ampere A100 SXM4 vs Instinct MI250X
Complete side-by-side comparison of specs, performance, memory, power efficiency, and pricing.
Ampere A100 SXM4
61
Spec Wins
Instinct MI250X
48
Detailed Specifications
Ampere A100 SXM4 — Best For
Instinct MI250X — Best For
Who Should Choose Each GPU?
Choose Ampere A100 SXM4 if you…
- ✓Need maximum CUDA/TensorRT/vLLM ecosystem compatibility
- ✓Have power-constrained data centers (400W vs 560W TDP)
- ✓Running Training workloads
- ✓Running Fine-tuning workloads
Choose Instinct MI250X if you…
- ✓Need more VRAM (128GB vs 80GB) for large model inference
- ✓Working with a tighter CapEx budget (lower list price)
- ✓Running HPC workloads
- ✓Running Scientific Computing workloads
Verdict
The Ampere A100 SXM4 and Instinct MI250X target different priorities. The Instinct MI250X's 128GB of HBM2e gives it a clear edge for large-model inference where fitting the full model in VRAM eliminates quantization overhead. Teams already invested in the NVIDIA/CUDA ecosystem will have less friction with the Ampere A100 SXM4, while teams open to ROCM can benefit from the Instinct MI250X's advantages. Use our TCO Calculator to model the full 3-year cost difference for your specific utilization and power costs.
Ampere A100 SXM4 vs Instinct MI250X: Common Questions
Which is faster, Ampere A100 SXM4 or Instinct MI250X?+
In FP8 throughput, the Instinct MI250X leads with 0 TFLOPS vs 0 TFLOPS. For LLM inference, memory capacity and bandwidth often matter more than raw TFLOPS — the Instinct MI250X has more VRAM (128GB).
Is Ampere A100 SXM4 or Instinct MI250X better for LLM training?+
For LLM training at scale, the Instinct MI250X has higher raw throughput. However, the choice also depends on your software stack: Ampere A100 SXM4 offers CUDA compatibility with the widest framework support (PyTorch, JAX, TensorRT).
What is the price difference between Ampere A100 SXM4 and Instinct MI250X?+
The Ampere A100 SXM4 is estimated at $12,000 per unit and the Instinct MI250X at $8,000. Actual pricing varies by vendor, volume, and configuration. Check our Buy page for current reseller pricing.
Which GPU is more power efficient, Ampere A100 SXM4 or Instinct MI250X?+
The Ampere A100 SXM4 has a lower TDP (400W vs 560W). Performance-per-watt depends on your workload — for FP8 inference, divide TFLOPS by TDP: Ampere A100 SXM4 = 0.0 TFLOPS/W vs Instinct MI250X = 0.0 TFLOPS/W.