Mistral 7B v0.3 at FP16 needs 14.5 GB for its weights and 23.1 GB in total at 8K context with 8 concurrent users. That means it fits on a single RTX 3090 24GB. 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× RTX | 24 GB | 23.1 GB | 42.02 | 504.2 | 6.72 s | $0.1377 | ✓ |
| 2× RTX | 48 GB | 23.1 GB | 71.43 | 1714 | 3.38 s | $0.0810 | ✓ |
| 4× RTX | 96 GB | 23.1 GB | 142.9 | 6857 | 1.70 s | $0.0405 | ✓ |
| 8× RTX | 192 GB | 23.1 GB | 285.7 | 27428 | 866.5 ms | $0.0203 | ✓ |
| Context | Concurrent users | KV per request | Fits? |
|---|---|---|---|
| 4K | 17 | 549.8 MB | ✓ fits |
| 8K | 8 | 1.07 GB | ✓ fits |
| 33K | 2 | 4.29 GB | ✓ fits |
| 66K | 1 | 8.59 GB | ✓ fits |
| 131K | 0 | 17.18 GB | ✗ does not fit |
| GPU | GPUs | Aggregate tok/s | Cost / 1M tok |
|---|---|---|---|
| RTX 5090 32GB | 1× | 965.3 | $0.1439 |
| RTX 4090 24GB | 1× | 543.0 | $0.2046 |
| AMD MI300X 192GB | 1× | 2855 | $0.2432 |
| V100 SXM2 32GB | 1× | 484.8 | $0.2865 |
| A100 40GB SXM4 | 1× | 834.9 | $0.2994 |
| AMD MI325X 288GB | 1× | 3232 | $0.3008 |
Yes. Mistral 7B v0.3 at FP16 needs 23.1 GB including the KV cache, and RTX 3090 24GB has 24 GB — so it fits on a single GPU.
42.02 tokens/sec per stream and 504.2 tok/s aggregate with continuous batching at 8 concurrent users. Time to first token is 6.72 s, and inter-token latency is 23.8 ms.
$0.1377 per 1M output tokens at 1× RTX 3090 24GB ($0.2500/hr). That is the marginal hardware cost — add idle capacity, ops, and egress for the real figure.
14.5 GB for the weights at FP16, plus 8.6 GB of KV cache for 8 concurrent requests at 8K context — 23.1 GB total. Every extra concurrent user at long context costs more, so leave headroom.
It works. Compare $0.1377 per 1M tokens against the alternatives below — the cheapest option that fits the same workload is 4× RTX 3080 10GB at $0.0399, and the fastest is 1× Cerebras CS-3 (WSE-3) at 10773 tok/s.
Same formulas, your context length, concurrency, and quantisation.