I have 8 sticks of the same ram across 2 PC's all other sticks do not cause the crash, (tested one at a time in the same machine) there is something dodgy about the one stick. This game has highlighted the pre existing issue. Should have been more clear. I have been having crashes for months intermittently in similarly demanding titles. But watch dogs legion and other titles currently installed are not crashing with the stick in question.
All it takes is for a single file you need to be sent to one bad sector and it screws up the whole system. I'm sure other games possibly handle these instances by retrying on another sector but it doesn't change the fact the ram is bad.
Oh okay that makes more sense and yes leaving out crashes for months is a big omission haha.


