While you should, technically, be able to run ray tracing on the GTX cards that have driver support for it, it is not likely to be a worthwhile experience.
Kodiack, with his 2080ti and 9900k is experiencing ~45% performance hit, so it is likely to be awful on my 2070 and unplayable on any GTX. My plan is to turn it on, take some screenshots and turn it off until there are hardware improvements and software optimization that make it worthwhile. It’s nice that they’re working on it though…