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Can I run Ternary-Bonsai-2-27B-gguf on an RTX 5090?

Yes

Its Ternary-Bonsai-2-27B-PQ2_0 file (7.21 GB) fits in the 28.8 GB an RTX 5090 can use, with room for ≈ 256K tokens of context.

Full analysis of Ternary-Bonsai-2-27B-gguf Everything that runs on RTX 5090 Get the Ternary-Bonsai-2-27B-PQ2_0 file on Hugging Face
ollama run hf.co/prism-ml/Ternary-Bonsai-2-27B-gguf

Files and context on RTX 5090

Each file of Ternary-Bonsai-2-27B-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 5090 Context (16-bit)Context (8-bit)
F1653.8 GBDoesn't fit——
Ternary-Bonsai-2-27B-PQ2_07.21 GBFits256K256K
Ternary-Bonsai-2-27B-PTQ1_05.95 GBFits256K256K

Ternary-Bonsai-2-27B-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.