Runs OS X El Capitan, Ubuntu 16.04 and Windows 10.
Lowest CPU temp is 24-25, but typically between 27-32. If gaming, it's closer to 40.
OCs well: http://valid.x86.fr/4s0fi5
I've recently swapped out the old additional 500GB sata drive with another 250GB SSD for OS X to run on. OS X (through Clover bootloader) runs perfectly, and boot times are excellent on SSD. http://www.tonymacx86.com/el-capitan-desktop-guides/189190-success-msi-z97-gaming-7-10-11-4-clover.html