iMac i7: When Does it Know it Needs to Shut Down to Prevent Damage?

[alvin777]

Hi. How smart is the iMac i7 (or any recent Macs)? Will it only shut down if the sensor detects that it's reached the temperature threshold for the CPU only (or GPU and CPU only) or will it shut itself down if it also detects that the hard drive if it reaches its temperature threshold? Or it's smart enough to shut down if any one of it's components that has sensors reach its temperature threshold? What other issues will it decide to shut down other than temperature issues? Thanks in advance. Gbu.