Hello all. I am looking to build a new PC. I really know very little about computers, but since my degree seems to be leading me into the computational realm, that will need to change quickly. Instead of just *building* a PC and going through the motions, I would really like to *learn* what exactly it is that I am doing. I want to learn about the components themselves and how they are specced out. So I would like to first talk about processors, since I believe that that will be the main component that I will need to choose and the rest will follow suit. Then I hope that this thread will evolve into a discussion about the remaining components. EDIT Added for clarity: I suppose I should say what the PC will be used for, since that will dictate many choices: I am not a gamer, but I will possibly use the PC to do some simulations (i.e., CFD or FEA). I am getting into programming quite a bit, but will probably never take it to a professional level. I use tools like Mathematica and MATLAB a lot. So here is what I already (think that) I know: The higher the processor speed and the more 'cores' the faster. That's all I know. So maybe we can use a specific processor as an example and talk about what each of the specs means: Intel Core i5-750 Lynnfield 2.66GHz 8MB L3 Cache LGA 1156 95W Quad-Core Processor http://www.newegg.com/Product/.....6819115215 [Broken] I have wikipedia'd these, but it's a little wordy; maybe someone could paraphrase for me: L3 Cache Manufacturing tech (they are all the same, so I guess I don't really care about this one) What does the "LGA 1156 95W" mean? What is the difference between the one I linked above and this one? http://www.newegg.com/Product/.....6819115131 [Broken] They are both Quad core 2.66GHz. What does the other stuff mean?