With the current tailwind to NVDA specifically but also the entire tech sector I see a very good chance for a nice bump. The second half of the year leading up to the election could be gangbusters as it normally is. On top is probably a couple of interest cuts. I'd guess a split could come around $1k and be about 10-1. At $100 or so per share it's phsycologically cheaper (positive) and phsycology is an important trading component.
I can't imagine that they'd do much more than the 4 for 1 split they did in 2001. Probably won't do much more than 2 for 1, or maybe even a 3 for 2 split.
The more ponderous the size of the share base, the more it takes to move it. Get the share base up too big and it will cause problems.