The fan is designed that way it is a corsair rgb fan so would be pointless upside down. There are 2 vents the top and the back of the psu. So it draws from the top and blows out the back. Upside down is pointless as its basically drawing air from your carpet to blow it out the back. The old psu was around 5 years old and was on its last legs. Temp inside case are around 35c now with the new psu, CPU around 53 during gaming and around 70c on the graphics card. I did have water cooling on my old cpu but the wraith cooler that comes with the new amd cpu was actually better than the water cooling at keeping temps down, also it helps keep the gpu cooler as it blows air around components as well as the cpu which a rear fan water cooler wont.