Heh.. speedfan is prolly displaying more temps that just wont fit in the way the window is displayed.
I'm guessing Temp 1 is the Tcase temp, and Temp 2 is the Chipset or system temp.
If you have a MB CD that came with a utility software, that should read the Tcase and system temps as well.
Also, when you click on configure, you can un-check temps that maybe really out of whack (Like Temp 3 = -2C) since SpeedFan is only showing what it sees. You would need to figure out what it exactly sees.
The GPU temp should match GPU-Z, or what ever video card (NV or ATI) software should display it's temp.
I find the bios temp which reads the Tcase sensor to be fairly accurate, not exactly accurate, but would not trust core temps alone at idle.