Those temps sound fine. Most temps referenced are in C, not in F. 30c, a fairly normal idle temp is 86F. 40c is 104F, so a smaller rise in celsius will appear as a larger jump in fahrenheit. Under stress tests when overclocked my 4690k reaches 75c which is 167F. Gaming loads depends on the game, usually around 50-60c depending on the game. That's using a larger air cooler like 10tacle with ambient temps ranging anywhere from 71f to 78f depending how high my heat is turned up.