I've checked temperature of my SSD M.2 950 pro in my NFC S4 mini, in vertical stand.
After OS boot : 48°C (room @20°C)
After checking Evil with in (60Go) + Pillars of eternity (19go) folder in steam : 59°C
After benchmark in magician : 62°C
After 1 hour gaming session (Armored warfare, default R9 Nano) : 64°C
After 5 min cooling down : 57°C
We are still far away from throttling limit of 70°C.
So, in vertical stand, NFC S4 mini is M.2 SSD friendly, in vertical stand..
It's worth to highlight that as others SFF could struggle on cooling M.2 SSD
