Similar-enough story on an Asus similarly branded "ultrabook", I figured I would put my whole fedora root partition on that cache, which worked wonders for a few months, until I started having random freezes and crashes that I later diagnosed thanks to `rpm -V` to be data corruptions. At that point the hinges were dead, pulling the screen away from the chassis during operations and dangerously exposing a mainboard PCB. That's when I replaced it with a ThinkPad T that's still going like new after 8 years :-)