I don't know if 47 degrees temp3 is too high. Lower is always better in my opinion.

Mine was 44 and I lowered it 3 degrees by making the PSU external. (HQ ENERMAX GOLD PSU BTW!! LOVE IT)

Also I use an external ventilator to cool down the aluminium bottom plate since this is connected to the cooling sinks inside.

Temp3 is now steady at 41.