Can I run Intern-Decision-0.8B on an RTX 5070 Ti?

Yes

Its published weights (1.71 GB) fit in the 14.4 GB an RTX 5070 Ti can use, with room for ≈ 256K tokens of context.

hf download internlm/Intern-Decision-0.8B

Files and context on RTX 5070 Ti

Each file of Intern-Decision-0.8B (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.

Intern-Decision-0.8B on other hardware

Popular models that run on RTX 5070 Ti

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.