NVIDIA has a thorough process for interviewing. Expect to speak to between 5-12 people for any Director of above position. Rapid succession interviews with a lot of very smart people can be tiring.
I applied through college or university. I interviewed at NVIDIA
Interview
I was contacted for a phone screen, the next step (presumably) would be an on-site interview. This is after a quick test at my university's career fair 3 weeks ago.