How do i monitor system temperature

[jamespage17]

I have just made a new PC and need to monitor system temps, what software should i use and what is classed as a high temperature.

 

[Siggy19]

speedfan does WAY more than just monitoring the speed of the fans... It shows all the temperatures as well as any SMART errors on the hard drive.

 

[aford10]

speedfan and real temp work nice.