Can I run Edge0-8B-A1B-preview on an RTX 5090?

Yes

Its published weights (4.56 GB) fit in the 28.8 GB an RTX 5090 can use, with room for an unknown amount of context.

hf download Edge0/Edge0-8B-A1B-preview

Files and context on RTX 5090

Each file of Edge0-8B-A1B-preview (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.

Edge0-8B-A1B-preview 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.