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Can I run Qwen3.8-27B-Heretic-GSQ-RCO-GGUF on an RTX 4090?

Yes

Its IQ3_S file (12.2 GB) fits in the 21.6 GB an RTX 4090 can use, with room for ≈ 137K tokens of context.

Full analysis of Qwen3.8-27B-Heretic-GSQ-RCO-GGUF Everything that runs on RTX 4090 Get the IQ3_S file on Hugging Face
ollama run hf.co/0bserverx/Qwen3.8-27B-Heretic-GSQ-RCO-GGUF:IQ3_S

Files and context on RTX 4090

Each file of Qwen3.8-27B-Heretic-GSQ-RCO-GGUF (and of GGUF versions the site has analyzed), and how much context fits next to it, with the context cache in 16-bit or 8-bit.

FileSizeOn RTX 4090 Context (16-bit)Context (8-bit)
IQ3_S12.2 GBFits137K256K
RVN-Qwen3.8-27B-Heretic-GSQ-RCO-IQ3_S11.8 GBFits144K256K
IQ3_XXS10.6 GBFits162K256K
RVN-Qwen3.8-27B-Heretic-GSQ-RCO-IQ3_XXS10.1 GBFits169K256K
IQ2_S9.73 GBFits175K256K
RVN-Qwen3.8-27B-Heretic-GSQ-RCO-IQ2_S9.28 GBFits181K256K
IQ2_XS8.90 GBFits187K256K
RVN-Qwen3.8-27B-Heretic-GSQ-RCO-IQ2_XS8.45 GBFits194K256K

Qwen3.8-27B-Heretic-GSQ-RCO-GGUF on other hardware

Popular models that run on RTX 4090

Assumes 90% of the card's memory is usable and at least 4K tokens of context for one conversation, with the context cache in 16-bit unless noted. Fits leaves at least 20% of that memory for context; Tight leaves less.