I applied online.
The OA was pretty difficult, however doable if you learn the material in the section that is "Standing Out". Following up, a good way to practice the code is using LeetCode Hard + Medium problems. Do it in C, C++, or Python.
The following metrics were computed from 6 interview experiences for the Nvidia Hardware Engineering Intern role.
Nvidia's interview process for their Hardware Engineering Intern roles is fairly selective, failing a large portion of engineers who go through it.
Candidates reported having good feelings for Nvidia's Hardware Engineering Intern interview process.