1 . So looking at that second Aida64 picture: Its kicking itself into AMD Quiet'n'Cool Mode (Wikipedia Cool'n'Quiet Article) when not under load.
2. NH-L9x65 Cooler is not recommend by Notctua (Noctua L9X65 Guidelines) for 125w Processors hence no good for a FX-8350.
3. GA-970A-D3SP only have a 4+1 VRM plus 970 boards will run hot. I've run a FX-8350 on MSI 970 Gaming (6+2 VRM) and saw temps on the VRM up to 80C.
I'd look for a better rated CPU cooler and some kind of cooling fan for the VRM heatsink if your friends is deadset on keeping the board. Otherwise, 990FX bo