Files ending in .rar from unofficial sources can sometimes be used to distribute malware. If this file was sent to you unexpectedly, verify it with a tool like VirusTotal before opening.
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. 50316.rar
If you've been getting the immediate crash when loading a new survival planet, I’ve found a workaround that’s keeping things stable at 60FPS. Files ending in
Solution for Space Engineers 2 "Survival Scenario" Crash (Issue #50316) 50316.rar
Always backup your save files before applying community-made RAR patches.