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I have been fiddling with some commands and I think I have found a possible fix for the game crash after saving. Alll I know is that ive been able to save and autosave and quicksave, and havnt crashed once while this has been set. I probably should test more, but I figured I'd get it out there.
Code:
mat_forcehardwaresync 0
along with below which you might probably have set.