Can I run Qwen3.8-3.6-27B-blend-GGUF on an RTX 5090?

Yes

Its Q5_K_M file (19.5 GB) fits in the 28.8 GB an RTX 5090 can use, with room for ≈ 136K tokens of context.

Full analysis of Qwen3.8-3.6-27B-blend-GGUF Everything that runs on RTX 5090 Get the Q5_K_M file on Hugging Face

ollama run hf.co/JetBrains/Qwen3.8-3.6-27B-blend-GGUF:Q5_K_M

Files and context on RTX 5090

Each file of Qwen3.8-3.6-27B-blend-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.

File	Size	On RTX 5090	Context (16-bit)	Context (8-bit)
Q5_K_M	19.5 GB	Fits	136K	256K
Q4_K_M	16.8 GB	Fits	176K	256K
IQ4_XS	14.3 GB	Fits	214K	256K
Q3_K_XL	13.1 GB	Fits	231K	256K
IQ3_S	12.6 GB	Fits	239K	256K

Qwen3.8-3.6-27B-blend-GGUF on other hardware

Popular models that run on RTX 5090

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.