Can I run granite-switch-4.1-8b on an RTX 5090?

Yes

Its published weights (17.6 GB) fit in the 28.8 GB an RTX 5090 can use, with room for an unknown amount of context.

Full analysis of granite-switch-4.1-8b Everything that runs on RTX 5090 Get the weights on Hugging Face

hf download ibm-granite/granite-switch-4.1-8b

Files and context on RTX 5090

Each file of granite-switch-4.1-8b (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.

File	Size	On RTX 5090	Context (16-bit)	Context (8-bit)
As published	17.6 GB	Fits	not known	not known
4-bit (estimate)	4.94 GB	Fits	not known	not known

granite-switch-4.1-8b on other hardware

NVIDIA H100Yes
RTX 5090Yes
RTX 4090Probably, at 4-bit
RTX 3090Probably, at 4-bit
RTX 5060 Ti 16 GBProbably, at 4-bit
RTX 3060 12 GBProbably, at 4-bit
RTX 4060Probably, at 4-bit
Mac with 32 GBProbably, at 4-bit
Mac with 64 GBYes
Mac with 128 GBYes

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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.