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 B300 SXM 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× B300 | 288 GB | 7.6 GB | 4577 | 54930 | 42.6 ms | $0.0405 | ✓ |
| 2× B300 | 576 GB | 7.6 GB | 7782 | 186761 | 36.3 ms | $0.0238 | ✓ |
| 4× B300 | 1152 GB | 7.6 GB | 15563 | 747042 | 33.2 ms | $0.0119 | ✓ |
| 8× B300 | 2304 GB | 7.6 GB | 31127 | 2988169 | 31.6 ms | $0.005949 | ✓ |
| Context | Concurrent users | KV per request | Fits? |
|---|---|---|---|
| 4K | 712 | 412.3 MB | ✓ fits |
| 8K | 356 | 824.6 MB | ✓ fits |
| 33K | 89 | 3.22 GB | ✓ fits |
| 66K | 44 | 6.44 GB | ✓ fits |
| 131K | 22 | 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 5090 32GB | 1× | 12304 | $0.0113 |
| RTX 4090 24GB | 1× | 6921 | $0.0161 |
| RTX 4080 16GB | 1× | 4923 | $0.0169 |
| AMD MI300X 192GB | 1× | 36391 | $0.0191 |
Yes. BGE-M3 (embed, 1024-dim) at FP16 needs 7.6 GB including the KV cache, and B300 SXM 288GB has 288 GB — so it fits on a single GPU.
4577 tokens/sec per stream and 54930 tok/s aggregate with continuous batching at 8 concurrent users. Time to first token is 42.6 ms, and inter-token latency is 218.5 µs.
$0.0405 per 1M output tokens at 1× B300 SXM 288GB ($8.00/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 $0.0405 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.