80'C max temp for GTX750Ti, it is still in safe zone but not really recommended inside around 25'C room temperature.
I am just guessing that you are from India, how is your room temperature, already over 33'C?
I just think that your room temp should about the same to my room back home in south east Asia.
If your room is already in 35'C zone, it will go to 80'C and this is ok, nothing much you can do about it.