BGE-M3 (embed, 1024-dim) at FP16 needs 1.1 GB for its weights and 7.6 GB in total at 8K context with 8 concurrent users. That means it fits on a single RTX 5090 32GB. 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 | 32 GB | 7.6 GB | 1025 | 12304 | 208.2 ms | $0.0113 | ✓ |
| 2× RTX | 64 GB | 7.6 GB | 1743 | 41834 | 119.2 ms | $0.006640 | ✓ |
| 4× RTX | 128 GB | 7.6 GB | 3486 | 167337 | 74.6 ms | $0.003320 | ✓ |
| 8× RTX | 256 GB | 7.6 GB | 6972 | 669350 | 52.3 ms | $0.001660 | ✓ |
| Context | Concurrent users | KV per request | Fits? |
|---|---|---|---|
| 4K | 76 | 412.3 MB | ✓ fits |
| 8K | 38 | 824.6 MB | ✓ fits |
| 33K | 9 | 3.22 GB | ✓ fits |
| 66K | 4 | 6.44 GB | ✓ fits |
| 131K | 2 | 12.88 GB | ✓ fits |
| GPU | GPUs | Aggregate tok/s | Cost / 1M tok |
|---|---|---|---|
| RTX 3080 10GB | 1× | 5218 | $0.0106 |
| RTX 3090 24GB | 1× | 6427 | $0.0108 |
| RTX 4090 24GB | 1× | 6921 | $0.0161 |
| RTX 4080 16GB | 1× | 4923 | $0.0169 |
| AMD MI300X 192GB | 1× | 36391 | $0.0191 |
| V100 SXM2 32GB | 1× | 6180 | $0.0225 |
Yes. BGE-M3 (embed, 1024-dim) at FP16 needs 7.6 GB including the KV cache, and RTX 5090 32GB has 32 GB — so it fits on a single GPU.
1025 tokens/sec per stream and 12304 tok/s aggregate with continuous batching at 8 concurrent users. Time to first token is 208.2 ms, and inter-token latency is 975.3 µs.
$0.0113 per 1M output tokens at 1× RTX 5090 32GB ($0.5000/hr). That is the marginal hardware cost — add idle capacity, ops, and egress for the real figure.
1.1 GB for the weights at FP16, plus 6.4 GB of KV cache for 8 concurrent requests at 8K context — 7.6 GB total. Every extra concurrent user at long context costs more, so leave headroom.
It works. Compare $0.0113 per 1M tokens against the alternatives below — the cheapest option that fits the same workload is 1× RTX 3080 10GB at $0.0106, and the fastest is 1× Cerebras CS-3 (WSE-3) at 137324 tok/s.
Same formulas, your context length, concurrency, and quantisation.