So, I really don't understand what is the real difference between the 2 (HiDPI vs non HiDPI). When I run a 3rd party resolution manager, I notice that Apple sets the resolutions to HiDPI. I feel through unbenchmarked support that HiDPI is slower (its obvious in animations when launching launch control). So why would I run HiDPI? Non HiDPI resolutions have more options, and seem faster. All the googling I have done really keeps applying to non-retina monitors.