You can find the answers and get a good insight in the Micsig threads.
and maybe refer to models, as they are not the same.. Micsig has quite a few 8" models ATO, TO & the STO-1000, STO-1000C, STO-1000E, STO-2000C series, .. some have 2 fans if I recall (ATO/TO), and some have 1 bigger fan STO/C/E and the "fan" are off quite a bit of the time, at least in the STO-series here in a colder climate like northern Europe.
Some older models run on Linux and the newer models run on Android.