The smp 4 manual page has more details. A kernel with the PAE feature enabled will detect memory above 4 gigabytes and allow it to be used by the system. This feature places constraints on the device drivers and other features of FreeBSD which may be used; consult the pae 4 manual page for more details. FreeBSD will generally run on ibased laptops, albeit with varying levels of support for certain hardware features such as sound, graphics, power management, and[…]