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Can I run Qwen3.8-27B-Jumbo-Fusion-IQ-747-900-Turbo-Brilliance-50X-Reasoning-Instruct-NEO-MAX-MTP-GGUF on an RTX 4090?

Yes, just

Its Q5_K_M file (19.5 GB) fits in the 21.6 GB an RTX 4090 can use, with room for ≈ 28K tokens of context.

Full analysis of Qwen3.8-27B-Jumbo-Fusion-IQ-747-900-Turbo-Brilliance-50X-Reasoning-Instruct-NEO-MAX-MTP-GGUF Everything that runs on RTX 4090 Get the Q5_K_M file on Hugging Face
ollama run hf.co/DavidAU/Qwen3.8-27B-Jumbo-Fusion-IQ-747-900-Turbo-Brilliance-50X-Reasoning-Instruct-NEO-MAX-MTP-GGUF:Q5_K_M

Files and context on RTX 4090

Each file of Qwen3.8-27B-Jumbo-Fusion-IQ-747-900-Turbo-Brilliance-50X-Reasoning-Instruct-NEO-MAX-MTP-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)
Q8_029.0 GBDoesn't fit——
Q6_K22.4 GBDoesn't fit——
Q5_K_M19.5 GBTight28K57K
Q4_K_M16.8 GBFits69K138K
IQ4_XS15.3 GBFits91K183K
IQ3_M12.8 GBFits129K256K
IQ2_M10.2 GBFits167K256K

Qwen3.8-27B-Jumbo-Fusion-IQ-747-900-Turbo-Brilliance-50X-Reasoning-Instruct-NEO-MAX-MTP-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.