NVIDIA48 GB VRAM864 GB/s$0.7/hr

Qwen 2.5-VL 7B (VLM) on L40S 48GB: Does It Fit, How Fast, What It Costs

Qwen 2.5-VL 7B (VLM) at FP16 needs 14.0 GB for its weights and 17.8 GB in total at 8K context with 8 concurrent users. That means it fits on a single L40S 48GB. Every figure is computed by tokcalc's open-source capacity model.

Fits?
Yes, 1 GPU
17.8 GB needed / 48 GB available
Decode speed
40.11
tok/s per stream
Aggregate
481.4
tok/s @ 8 concurrent
Cost / 1M tokens
$0.4039
1× L40S 48GB
What changes as you add L40S 48GBs
Tensor-parallel degree vs VRAM, throughput, and cost. Cost scales linearly with GPU count; decode throughput scales near-linearly too, so cost per token stays roughly flat.
GPUsTotal VRAMVRAM neededDecode tok/sAggregate tok/sTTFTCost / 1M tokFits?
1× L40S48 GB17.8 GB40.11481.42.56 s$0.4039✓
2× L40S96 GB17.8 GB68.1916371.30 s$0.2376✓
4× L40S192 GB17.8 GB136.46547663.4 ms$0.1188✓
8× L40S384 GB17.8 GB272.826187346.7 ms$0.0594✓
Concurrency vs context length
On 1× L40S 48GB at FP16. KV cache scales linearly with context, so this is the number of users your GPUs can actually serve.
ContextConcurrent usersKV per requestFits?
4K144240.5 MB✓ fits
8K72481.0 MB✓ fits
33K181.88 GB✓ fits
66K93.76 GB✓ fits
131K47.52 GB✓ fits
Other GPUs that run Qwen 2.5-VL 7B (VLM)
Same workload, same quantization — ranked by value (tokens per dollar-hour).
GPUGPUsAggregate tok/sCost / 1M tok
RTX 3090 24GB1×521.5$0.1332
RTX 5090 32GB1×998.4$0.1391
RTX 4090 24GB1×561.6$0.1978
AMD MI300X 192GB1×2953$0.2352
V100 SXM2 32GB1×501.4$0.2770
A100 40GB SXM41×863.6$0.2895
Frequently asked questions

Can Qwen 2.5-VL 7B (VLM) run on L40S 48GB?

Yes. Qwen 2.5-VL 7B (VLM) at FP16 needs 17.8 GB including the KV cache, and L40S 48GB has 48 GB — so it fits on a single GPU.

How fast is Qwen 2.5-VL 7B (VLM) on L40S 48GB?

40.11 tokens/sec per stream and 481.4 tok/s aggregate with continuous batching at 8 concurrent users. Time to first token is 2.56 s, and inter-token latency is 24.9 ms.

What does Qwen 2.5-VL 7B (VLM) on L40S 48GB cost per million tokens?

$0.4039 per 1M output tokens at 1× L40S 48GB ($0.7000/hr). That is the marginal hardware cost — add idle capacity, ops, and egress for the real figure.

How much VRAM does Qwen 2.5-VL 7B (VLM) need on L40S 48GB?

14.0 GB for the weights at FP16, plus 3.8 GB of KV cache for 8 concurrent requests at 8K context — 17.8 GB total. Every extra concurrent user at long context costs more, so leave headroom.

Is L40S 48GB the right choice for Qwen 2.5-VL 7B (VLM)?

It works. Compare $0.4039 per 1M tokens against the alternatives below — the cheapest option that fits the same workload is 2× RTX 3080 10GB at $0.0772, and the fastest is 1× Cerebras CS-3 (WSE-3) at 11143 tok/s.

Adjust the workload yourself

Same formulas, your context length, concurrency, and quantisation.

Open in calculator