Originally Posted by Dubstepov
Tip, turn the hard drive bay so they are facing forward and not at the side like they come pre-installed, you gonna get way better airflow inside the case.
this is very good advice. disk drives really don't get that hot, especially if you run SSDs, and the dedicated cross-vent for the hard drive cages provides a nice amount of configurability but little effectiveness. I like to think of computer cases as a sort of air tunnel, with a majority of the air moving in a directional, fluid-like flow from front to back and/or bottom to top. I usually play around with different configurations when I'm in my case doing anything major. recently having swapped motherboards, I changed how my disk drives were positioned.. previously, I had my 2 SSDs and 1 HDD in the 3 bottom slots of the bottom HDD cage, with the top 5 slots open. simply by spacing the drives out within the bays (i.e. instead of being in slots 1, 2, & 3 - they are now in slots 1, 4 & 7) I lowered my temps by 5C! it takes a lot of trial and error to optimize the airflow and temps of a given rig. there are, of course, rules of thumb which will apply in a general way to most rigs. but, for the utmost airflow and lowest temps, some custom adaptations are probably going to be required determined on your hardware configuration.
also, while swapping the CPU between boards.. I was appalled to see this
(I had brought my rig to a PC repair shop because I was having trouble with the RAM posting a few months ago)
what looks to be TIM(?) on several of the CPU contacts
2-step ArctiClean TIM remover and surface purifier applied (left), cleaned and dried CPU (right)