u need to purge the hot air out. cos without air circulation the chasis will get warmer then if the PC place next to u will feel like having an oven. also if dont purge the hot air out, the ram gets warm easier.
gpu and cpu can ram up to above 70 degrees your internal chasis will be ~60 degree this will affect your ram tempreture. heat need to escape then = cooling.
1) install case fan, esp on the rear and top.
2) put a table fan blow the hot air away from you. if got ceiling or aircon better.
moi cpu idle temp.