I've read through all the threads that you have posted in the last few weeks, and here's my advice:
Go to Amazon and pick up a used A+ certification book. It doesn't even need to be for the current iteration of the test. It will teach you loads about how PCs work the way they do and why we build them the way we do, and it will answer a lot of the questions you have asked here. To me, it looks like you need to find the beginning point and that's probably where you should start.
As far as not having fans in the case - I don't know why you would buy a new case (according to your threads you were looking at a CM something or another) and then not put any fans in it (or use the ones I'm sure it came with, for that matter). It sounds to me like you are trying to get a grasp on what you are doing, and honestly, until you read up a little on the general subject of PCs, you are going to continue to struggle with things like "Are IDE cards good".