Can the GeForce RTX 5080 run Qwen3 4B?
Fits comfortably at Q4_K_M.
Qwen3 4B is 4B parameters. At Q4_K_M the weights are about 2.2 GiB; with the 1.5 GiB runtime reserve that is 3.7 GiB against the card's 16GB, leaving about 12.3 GiB for context.
All three quants
16GB card| Quant | Weights | With reserve | Verdict | Headroom |
|---|---|---|---|---|
| Q4_K_Mthe everyday quant | 2.2 GiB | 3.7 GiB | Fits comfortably | 12.3 GiB |
| Q8_0near-lossless | 3.9 GiB | 5.4 GiB | Fits comfortably | 10.6 GiB |
| FP16full weights | 7.5 GiB | 9.0 GiB | Fits comfortably | 7.0 GiB |
Verdict rules: fits comfortably when weights plus reserve sit within 85% of VRAM; tight when they fit with little left for context; CPU offload when they exceed VRAM by up to 2x (runs, slowly, with layers in system RAM); no beyond that. The KV cache per token depends on the model's architecture and is not modelled here.
Good match. Get the card.
The GeForce RTX 5080 clears Qwen3 4B at Q4_K_M and at Q8_0. Live listings below; this page was rebuilt 2026-08-23.
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About the model
Qwen3 4B by Alibaba Qwen: 32,768-token native context, text, released 2025 under the Apache-2.0. Model card →