The issue with Fallout 4 crashing so often as Bethesda already knows is a RAM / VRAM related issue due to the game's lack of optimization. If you have a Graphics card that has VRam of 2gb or less you will CTD (Crash To Desktop). The higher your visual settings are the more often you'll CTD even despite having 30fps. If you're RAM can't handle all the cache that comes from the game it will cause Driver Failure. AMD has not made any updates on this nor has the latest Beta 1.2.33 patch helped at all. The only way to prevent the CTD from happening as much or constantly is to lower Visual Settings EVEN MORE than you already have (IE lower distance stuff, lower resolution). Even then the game will still CTD no matter what you do (5-45mins until CTD is what I get). People with higher end GPUs will not experience this problem as much or at all. But anyone with 2gb of VRam or less (or even 4gb or less) will still CTD randomly.
I'm on R7 200 series 2GB VRAM, 8GB Ram, i5 6600K Processor. My OS is windows 10 64bit and I play fallout at lowest settings for everything besides godflare and resolution. I still randomly CTD depending on what I'm doing 5-45 minutes at most. To be sure it's not just my low end specs I've done research on the RAM usage of everything and I shouldn't be having this problem (Unless of course the game isn't optimized correctly or has memory leaks)
(VRam 2gb + Ram 8gb) - (2gb OS + 3gb max fallout) = (50%) rather 30-70% of ram possibly used.?
I hope this clarifies the Fallout 4 CTD issue for anyone who's clicked every link on the first 10 pages of google looking for a solution. The latest Beta Update and the latest AMD Drivers have not yet fixed this problem for above Minimum Specs users. This game simply should not have been released so early with literal game breaking bugs such as this. I've been a huge ES fan for years and recently got into fallout4. Needless to say I'm extremely disappointed with the magnitude of this bug. As a Bethesda really devoted fan I obviously am used to semi game breaking bugs but this one is outragous and the degree of ignorance and problems revolving around it is a lot to take in. Hopefully as I type this the developers are fixing this issue.
Temp Solution: Set everything to as low as possible. (OFF, LOW, or MEDIUM) and turn Distance display down for Items, Actors, Objects and whatever else. (this can prevent/cause CTD)
Even if you make 30+fps in High/Medium settings, the CTD will still happen.
Thanks and goodbye.