Memory can be assigned to all sorts of things so the impact of a single bit change will depend entirely on what that memory is being used for at that moment.
For example, I load a program into memory, but I'm not running all of the code in that program all the time. Let's say the program includes code for exporting a list to excel, but that's a feature I never use.
Or it has a procedure which uses a local variable as a loop counter. Outside the confines of that loop the variable is meaningless.
Plus its unlikely you are even nominally using all 64g at the same time. The errors might all be happening in unused ram.
Even if it flips actual data, it may end up being no more than a typo in a document.
So yes, a single bit in 4gb might flip from time to time. But the probability of the flip being "meaningful" is less than 1.