Yeah RAM issues can result in the OS seeming like it is "Possessed" by evil spirits sorta speak.
For Stripe size.
128k = For Video encoding and working with very large files.
64k = A average most used stripe size good for large files and OS installs.
32k = Good for OS installs probably the best one for a OS.
16k = Good for OS and working with smaller files.
8k = Used for databases, Not used for a OS install.