The issue seems tied to the survival scenario logic itself rather than your hardware. Grab the 50316.rar file attached below—it contains the config tweaks needed to bypass the hang. Extract to your mods folder.
Some users have also seen success by using the "creative with verdure and kemik" mod from the Steam Workshop to initialize the planet first. Option 2: Technical Update Post (Steam/Reddit) 50316.rar
Maintains solid frames on high settings once the scenario initializes. The issue seems tied to the survival scenario