Qwen 2.5-VL 72B (VLM) at FP8 (E4M3) needs 72.0 GB for its weights and 93.5 GB in total at 8K context with 8 concurrent users. That means it fits on a single AMD MI325X 288GB. 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× AMD | 288 GB | 93.5 GB | 81.25 | 975.0 | 1.85 s | $0.9972 | ✓ |
| 2× AMD | 576 GB | 93.5 GB | 138.1 | 3315 | 939.8 ms | $0.5866 | ✓ |
| 4× AMD | 1152 GB | 93.5 GB | 276.3 | 13260 | 484.9 ms | $0.2933 | ✓ |
| 8× AMD | 2304 GB | 93.5 GB | 552.5 | 53040 | 257.5 ms | $0.1466 | ✓ |
| Context | Concurrent users | KV per request | Fits? |
|---|---|---|---|
| 4K | 160 | 1.34 GB | ✓ fits |
| 8K | 80 | 2.68 GB | ✓ fits |
| 33K | 20 | 10.74 GB | ✓ fits |
| 66K | 10 | 21.47 GB | ✓ fits |
| 131K | 5 | 42.95 GB | ✓ fits |
| GPU | GPUs | Aggregate tok/s | Cost / 1M tok |
|---|---|---|---|
| RTX 5090 32GB | 4× | 3960 | $0.1403 |
| A100 80GB SXM4 | 2× | 1105 | $0.6033 |
| H100 SXM5 80GB | 2× | 1851 | $0.7504 |
| AMD MI300X 192GB | 1× | 861.3 | $0.8063 |
| L40S 48GB | 2× | 477.4 | $0.8147 |
| Intel Gaudi 3 128GB | 1× | 536.3 | $1.04 |
Yes. Qwen 2.5-VL 72B (VLM) at FP8 (E4M3) needs 93.5 GB including the KV cache, and AMD MI325X 288GB has 288 GB — so it fits on a single GPU.
81.25 tokens/sec per stream and 975.0 tok/s aggregate with continuous batching at 8 concurrent users. Time to first token is 1.85 s, and inter-token latency is 12.3 ms.
$0.9972 per 1M output tokens at 1× AMD MI325X 288GB ($3.50/hr). That is the marginal hardware cost — add idle capacity, ops, and egress for the real figure.
72.0 GB for the weights at FP8 (E4M3), plus 21.5 GB of KV cache for 8 concurrent requests at 8K context — 93.5 GB total. Every extra concurrent user at long context costs more, so leave headroom.
It works. Compare $0.9972 per 1M tokens against the alternatives below — the cheapest option that fits the same workload is 8× RTX 4080 16GB at $0.1052, and the fastest is 4× Cerebras CS-3 (WSE-3) at 44200 tok/s.
Same formulas, your context length, concurrency, and quantisation.