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Can I run Qwen3.5-397B-A17B-GPTQ-Int4 on an RTX 4090?

No

Even its smallest file (As published, 236 GB) is more than an RTX 4090 can hold (21.6 GB usable): it needs more than 8 of them.

Full analysis of Qwen3.5-397B-A17B-GPTQ-Int4 Everything that runs on RTX 4090

Files and context on RTX 4090

Each file of Qwen3.5-397B-A17B-GPTQ-Int4 (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)
As published236 GBDoesn't fit——

Qwen3.5-397B-A17B-GPTQ-Int4 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.