That sounds a similar build to me, only I went with the Corsair SF760 PSU.
It's probably more a function of my case, but this build runs hot. currently ate idle / browsing with a Win 10 VM open also ide, I'm getting:
CPU - 34 degrees C
Motherboard - 48 Degrees C (This gets hot, - I've seen it hit 60)
PCH 61 degrees C (This gets hotter, but that's documented to not be an issue... it does warm up my M2 drive a fair bit though
😞 )
Coolant 29 degrees C
Is would estimate room temperature is about 16-17 degrees C, Nest says 18, but that's downstairs and I have the window open lol
As for sensor 5... no idea DIP5 only shows the ones listed everything else just calls it "sensor 5" - mines currently at 22.
Gotterdammerung: Rampage V Extreme | Intel I7-5930K | 32GB Corsair Dominator 2666 | EVGA GTX 980 SC x3
Kingston HyperX Predator 480GB | Corsair Neutron XT 960GB | Corsair AX1200 | Corsair 900D | EK RVE Monoblock | EK 980 GTX Blocks
GOOSE: STRIX Z390I Gaming | Intel i9-9900KF | 32GB Vengeance RGB 3200 | STRIX Vega 64 | Samsung 970 EVO Plus 1TB x2
Corsair SF 750 | Phanteks Evolv Shift X | EK Z390I Monoblock | EK Strix Vega 64 GPU Block