Can I Run Qwen3.8 27B on NVIDIA GeForce RTX 4080 Super?
Autor: Jakub Rusinowski · Ostatnia aktualizacja: 6 września 2026
Not at Q4_K_M — that needs 18.3 GB at 8K context and the NVIDIA GeForce RTX 4080 Super has 16 GB. Drop to Q3_K_M and it fits in 13.3 GB, with up to 32K of context.
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The numbers
| Model | Qwen3.8 27B |
| Parameters | 27B |
| Quantization | Q4_K_M |
| VRAM needed (8K context) | 18.3 GB |
| NVIDIA GeForce RTX 4080 Super VRAM | 16 GB |
| Verdict | Runs at a lower quant |
| Fits at | Q3_K_M (13.3 GB) |
| Max context | 32K |
Qwen3.8 27B on the NVIDIA GeForce RTX 4080 Super: VRAM by quantization
| Quant | VRAM needed | Fits 16 GB? | Max context | Whole PC |
|---|---|---|---|---|
| F16 | 57.1 GB | ✗ No | — | — |
| Q8_0 | 31 GB | ✗ No | — | Build for this |
| Q6_K | 24.3 GB | ✗ No | — | — |
| Q5_K_M | 21.2 GB | ✗ No | — | Build for this |
| Q4_K_M | 18.3 GB | ✗ No | — | Build for this |
| Q3_K_M | 13.3 GB | ✓ Yes | 32K | — |
| Q2_K | 10.6 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 16 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 GeForce RTX 4080 Super: 8K 18.3 GB ✗ · 32K 19.9 GB ✗ · 128K 26.3 GB ✗. Past 8K it no longer fits 16 GB — a q8_0 KV cache buys roughly half of that back, which the calculator will price for you.
What to do next
Quantize to Q3_K_M. That is the cheapest fix — it costs some quality but no money.
No compatible GPU? Qwen3.8 27B on 16 GB of system RAM, CPU only: runs.
Running Qwen3.8 27B on this card:
Qwen3.8 27B needs ~18 GB but this GPU has 16 GB. Rent a RTX 4090 (24 GB)-class GPU by the hour instead of buying one:
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Cloud rates verified 2026-07 — estimates, and marketplace prices vary. Buying price is GPU MSRP only, not a full PC.
Other Qwen3.8 sizes on the NVIDIA GeForce RTX 4080 Super
- Qwen3.8-Max — does not fit (1457.5 GB)
- Qwen3.8-Flash-Next — does not fit (109.7 GB)
Qwen3.8 27B on nearby hardware
- Intel Arc B580 (12 GB) — runs at a lower quant
- AMD Radeon RX 7900 XT (20 GB) — runs
All Qwen3.8 sizes on the NVIDIA GeForce RTX 4080 Super | Qwen3.8 27B model page | NVIDIA GeForce RTX 4080 Super GPU page | VRAM calculator | Check your hardware