Can I Run Qwen 3 on NVIDIA L40S?
Autor: Jakub Rusinowski · Ostatnia aktualizacja: 21 lipca 2026
Yes, comfortably — Qwen 3 32B at Q4_K_M needs 22.8 GB at 8K context (19.8 GB weights + 3 GB KV cache/overhead), leaving ~25.2 GB of the NVIDIA L40S's 48 GB, at ~35 tok/s (est.), with room for up to 64K context.
See what else this hardware can run →
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NVIDIA L40S Specs
| VRAM | 48 GB |
| Memory Bandwidth | 864 GB/s |
Qwen 3 32B on the NVIDIA L40S: VRAM by quantization
| Quant | VRAM needed | Fits 48 GB? | Max context | Whole PC |
|---|---|---|---|---|
| F16 | 68.5 GB | ✗ No | — | — |
| Q8_0 | 37.8 GB | ✓ Yes | 32K | Build for this |
| Q6_K | 29.8 GB | ✓ Yes | 64K | — |
| Q5_K_M | 26.2 GB | ✓ Yes | 64K | Build for this |
| Q4_K_M | 22.8 GB | ✓ Yes | 64K | Build for this |
| Q3_K_M | 16.9 GB | ✓ Yes | 64K | — |
| Q2_K | 13.7 GB | ✓ Yes | 64K | — |
Assumes an 8K-token context with an f16 KV cache. A longer window needs more; a quantized KV cache needs less. “Max context” is the largest window that still fits in 48 GB. Figures are estimates from parameter count, quantization and memory bandwidth — the analyzer lets you tune KV-cache quant and context.
Context costs VRAM too. At Q4_K_M on the NVIDIA L40S: 8K 22.8 GB · 32K 29.2 GB · 125K 54.2 GB ✗. Past 125K it no longer fits 48 GB — a q8_0 KV cache buys roughly half of that back, which the calculator will price for you.
No compatible GPU? Qwen 3 32B on 32 GB of system RAM, CPU only: runs comfortably.
Qwen 3 Sizes That Fit the NVIDIA L40S (at 8K context)
| Qwen 3 32B | Q4_K_M · 22.8 GB at 8K context · ~35 tok/s (est.) |
| Qwen 3 30B-A3B (MoE) | Q4_K_M · 20 GB at 8K context · ~191 tok/s (est.) |
| Qwen 3 14B | Q4_K_M · 11.1 GB at 8K context · ~70 tok/s (est.) |
| Qwen 3 8B | Q4_K_M · 7 GB at 8K context · ~109 tok/s (est.) |
At 2 hrs/day, buying (~$7,499) beats renting at $0.34/hr after about 30.6 years.
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Cloud rates verified 2026-07 — estimates, and marketplace prices vary. Buying price is GPU MSRP only, not a full PC.
FAQ
Qwen 3 on the NVIDIA L40S — does it fit?
Yes, comfortably — Qwen 3 32B at Q4_K_M needs 22.8 GB at 8K context (19.8 GB weights + 3 GB KV cache/overhead), leaving ~25.2 GB of the NVIDIA L40S's 48 GB, at ~35 tok/s (est.), with room for up to 64K context.
Which Qwen 3 variant fits best on the NVIDIA L40S?
Qwen 3 32B at Q4_K_M quantization needs 22.8 GB at 8K context (19.8 GB weights + 3 GB KV cache/overhead), estimated ~35 tokens/sec, up to 64K context.
Every Qwen 3 size on the NVIDIA L40S
| Size | VRAM at 8K | Verdict | Speed |
|---|---|---|---|
| Qwen 3 235B-A22B (MoE) | 144.3 GB | Does not fit | — |
| Qwen 3 32B | 22.8 GB | Runs | ~35 tok/s |
| Qwen 3 30B-A3B (MoE) | 20 GB | Runs | ~191 tok/s |
| Qwen 3 14B | 11.1 GB | Runs | ~70 tok/s |
| Qwen 3 8B | 7 GB | Runs | ~109 tok/s |
Qwen 3 on Other GPUs
- Qwen 3 on NVIDIA RTX 6000 Ada Generation
- Qwen 3 on Apple M3 Pro
- Qwen 3 on NVIDIA GeForce RTX 5090
- Qwen 3 on Apple M4
- Qwen 3 on Apple M2 Pro
Popular Models on the NVIDIA L40S
VRAM Tier
Troubleshooting
Buying Guide
← Can I Run It? | Qwen 3 Model Page | NVIDIA L40S GPU Page | VRAM calculator | Check Your Hardware