TMPIN5 corresponds to?

i'm only starting to get into hardware tweaking

i'm using an intel dq965gf motherboard...not very overclocking friendly as i've researched
i'm not going to bother with overclocking on this mobo

but was wondering what the temperature readings that cpuid gave me relates to...

if i use the intel desktop utility it shows two motherboard temperature reading

and when i use cpuid hardware monitor it shows one motherboard temperature and one TMPIN5 temperature

was wondering if anybody knew where this reading is taken from...thx in advance