Very interesting. It must be really hot [real feel] in Your room. In general, You're missing whatsoever extended cooling in Your case. As You can see, there's a perforation space to the left of Your CPU in Your case. That's a place for exhaust fan. Maybe in front of the case, You have a place for the intake fan. Can You please do a photo of the back of the case, from inside, and of the front of the case, from inside? Because if You have a place for fans there, we're talking about 20 - 30 dollars for CPU cooler and 10-20 dollars for extra fans, and Your headache would dissapear.