I have
SpeedFan installed; I've had it installed for over a year, maybe two years or longer. If you try it, you may see generic terms for different items for which it displays temps find yourself wondering exactly what components it's referring to, since it may list 3, 4, or more temps, depending on your system.
To identify what the generic terms meant, I ran another utility called
Everest Free Edition. It also gives temp info but it's designed to generate a very detailed report on your system, so I see it as overkill as a tool to use mainly for temp readings. But, with the additional detail it provides, running it one time can give you some info to help identify the generic terms shown by SpeedFan. Then, you can change the name in SpeedFan.
Another way I could identify temps shown in SpeedFan was to access my BIOS, which shows two temps.
SpeedFan tells me 4 temps: CPU, motherboard, hard drive, and another one simply labeled Temp1. I do not know what the latter is.