What is cputin

I know that the cputin is the tcase or tjunction on intel but I have a Phenom 945 and am getting a cputin temp of 42 to 60. My cores are fine at 25 to 40.

Should I concern myself with this temp?
Can I cool this temp?
Which should I use as my actual processor temp, cputin or core?
What Is cputin?
Also there is a SYS and a AUX tin, what are these- chipset, ram?

I am new at computers and want to know which temp is good or bad. I am thinking about getting a better cpu hsfan, but want to know the necessity.

Current temps HWMonitor:

SYSTIN 21 - 24
CPUTIN 42 - 56
AUXTIN 48 - 51
Allcores 23 - 41

Those are min max but the CPU and AUX min is 1 for some reason so I changed it to the current temp at idle. My system is to the left

There is no temperature sensor in the socket. CPUTIN is CPU Temperature Input.

Core temperatures are always higher than CPU temperature, which means the tables for your CPU temperature are miscoded in BIOS. You can try flashing your BIOS to the latest release, which will sometimes correct the inaccuracy. Otherwise, since Hardware Monitor can't be calibrated, you can ignore CPU temperature, or you can instead use SpeedFan, which allows calibrations for CPU temperature and Core temperatures. Also, you just simply use Core Temp.