Just had the Dragon's Dogma 2 demo crash again with my newer RAM (default config). Checked out a Reddit page for it and found this: https://www.reddit.com/r/DragonsDogma/comments/1b9dhsu/character_creation_demo_for_dragons_dogma_2/
Seems like it's happening to a lot of people with 20-series cards. I wonder if there was just some weird issue with a Steam update or something that is causing things to get messed up.