I had exactly the same problem. Since the early access, I've been trying to find a solution.
First, I used DDU to completely remove the Nvidia driver in windows safe mode.
After restarting, I installed the Nvidia driver version 561.09. Since then, no more CTDs (crashes to desktop). I came across this through a reddit post. It wasn't about Avowed, but another game with the same engine and a RTX 4070 Super card.
So far, I've tried the epic graphic preset with DLSS 3, without Nvidia Reflex and Ray Tracing=off. VSync=on and a 120 fps cap (set via the game settings).
I still need to test other variations regarding stability.
Hope it helps you.
DDU: https://www.wagnardsoft.com/content/Download-Display-Driver-Uninstaller-DDU-18093
Nvidia 561.09: https://www.nvidia.com/en-us/geforce/drivers/results/232544/
