Can I run Nemotron 3 Nano 30B A3B on GeForce RTX 3090 Ti?

This one is close. The answer rests on a file size we calculated from the parameter count rather than measured, and it leaves 1 GB spare once the weights, a 2K context and runtime overhead are counted. A 10% error in that size changes the verdict, so treat it as a maybe and test before you buy.