SmolLM2 1.7B Instruct at FP16 needs 3.4 GB for its weights and 16.3 GB in total at 8K context with 8 concurrent users. That means it fits on a single A100 40GB SXM4. Every figure is computed by tokcalc's open-source capacity model.
| GPUs | Total VRAM | VRAM needed | Decode tok/s | Aggregate tok/s | TTFT | Cost / 1M tok | Fits? |
|---|---|---|---|---|---|---|---|
| 1× A100 | 40 GB | 16.3 GB | 296.3 | 3556 | 211.9 ms | $0.0703 | ✓ |
| 2× A100 | 80 GB | 16.3 GB | 503.8 | 12090 | 121.3 ms | $0.0414 | ✓ |
| 4× A100 | 160 GB | 16.3 GB | 1008 | 48360 | 75.6 ms | $0.0207 | ✓ |
| 8× A100 | 320 GB | 16.3 GB | 2015 | 193440 | 52.8 ms | $0.0103 | ✓ |
| Context | Concurrent users | KV per request | Fits? |
|---|---|---|---|
| 4K | 45 | 824.6 MB | ✓ fits |
| 8K | 22 | 1.61 GB | ✓ fits |
| 33K | 5 | 6.44 GB | ✓ fits |
| 66K | 2 | 12.88 GB | ✓ fits |
| 131K | 1 | 25.77 GB | ✓ fits |
| GPU | GPUs | Aggregate tok/s | Cost / 1M tok |
|---|---|---|---|
| RTX 3090 24GB | 1× | 2147 | $0.0323 |
| RTX 5090 32GB | 1× | 4111 | $0.0338 |
| RTX 4090 24GB | 1× | 2312 | $0.0480 |
| AMD MI300X 192GB | 1× | 12159 | $0.0571 |
| V100 SXM2 32GB | 1× | 2065 | $0.0673 |
| AMD MI325X 288GB | 1× | 13765 | $0.0706 |
Yes. SmolLM2 1.7B Instruct at FP16 needs 16.3 GB including the KV cache, and A100 40GB SXM4 has 40 GB — so it fits on a single GPU.
296.3 tokens/sec per stream and 3556 tok/s aggregate with continuous batching at 8 concurrent users. Time to first token is 211.9 ms, and inter-token latency is 3.4 ms.
$0.0703 per 1M output tokens at 1× A100 40GB SXM4 ($0.9000/hr). That is the marginal hardware cost — add idle capacity, ops, and egress for the real figure.
3.4 GB for the weights at FP16, plus 12.9 GB of KV cache for 8 concurrent requests at 8K context — 16.3 GB total. Every extra concurrent user at long context costs more, so leave headroom.
It works. Compare $0.0703 per 1M tokens against the alternatives below — the cheapest option that fits the same workload is 2× RTX 3080 10GB at $0.0187, and the fastest is 1× Cerebras CS-3 (WSE-3) at 45882 tok/s.
Same formulas, your context length, concurrency, and quantisation.