Historically, the RELEASE_NOTES had been mostly technical information, but once again Robby Workman has covered the important technical details in CHANGES_AND_HINTS.TXT. Thanks! After jumping ahead through various Linux kernel branches over the course of this development cycle, we ended up on the 4.4.x branch and decided to stick with it. Greg Kroah-Hartman's announcement back in October that the 4.4 series would be getting a long-term support for two years helped to cement this decision and should be good news for anyone wanting to keep a maintained stable kernel on their system. As usual, the kernel is provided in two flavors, generic and huge. The huge kernel contains enough built-in drivers that in most cases an initrd is not needed to boot the system. The generic kernels require the use of an initrd to load the kernel modules needed to mount the root filesystem. Using a generic kernel will save some memory and possibly avoid a few boot time warnings. On the 32-bit side of things, there are both SMP (multiple processor capable) and non-SMP (single processor) kernels. The non-SMP kernel is mostly intended for machines that can't run the SMP kernel, which is anything older than a Pentium III, and some models of the Pentium M that don't support PAE (although it seems that these might support PAE but just lack the CPU flags to advertise it -- try booting with the "forcepae" kernel option). On 32-bit, it is highly recommended to use the SMP kernel if your machine is able to boot with it (even if you have only a single core) because the optimization and memory handling options should yield better performance.
Você pode baixar a versão mais recente da iso aqui.