Thank you for the reply.
The igpu is indeed disabled as it is not listed alongside my nvidia card in the display/gpu page in aida, it must be as you say the gpu is disabled but the sensor is not and the temps its showing is probably just cpu core heat thats heated up the disabled igpu's sensor.
One more question if you dont mind.
I have a corsair ax1500i psu, in aida64 i have noticed that every 10 seconds or so when viewing the sensors page I get power supply #1 temps, power supply #2 temps and power supply #3 temps, ok its three temp sensors in different places in the psu but why every ten