i have finally found out the solution, the real cause of heating was "realtek hd audio" i think that driver is not needed in my pc, everytime i turn on internet it was also turned on, due to its over consumption of cpu percentage, the gpu"s load go high and started heating, so i finally went to task manager and opened the file location of realtek hd audio and deleted it, now my pc is alright, my gpu temperature also around 40 only.....