not to mention 70C on PSU.
That's not PSU. It's the PWM(MOSFET area) temperature on the mobo.
The acceptable temp for PWM is ~52C.
It sounds like you're using watercooling because PWM is cooled by exaust air from HSF.Where exactly is that? Is that the area around the CPU?
My board has that 3rd number around 80, but I haven't been able to find anythign that is even remotely that hot.