First off I think this website is great and since this is my first post I just wanted to say I'm a fan of the community!
Here's my question, I just installed a new cooler master hyper 212 evo r2 cooler on my fx-4100 cpu. My old one was the stock one that came with the cpu. Im 99% sure that I installed it properly and fastened it securely. However now that its installed I noticed a slight vibration when I slid the tower back Under the desk and it was touching the side of the desk. Since the desk and tower are metal I heard the noise. I have never used an after market cooler before. Is a slight vibration ok? I obviously don't want to vibrate the motherboard and wreck and components. Its not major vibration but its enough that I noticed it. My idle temp is at 35C/95F so that seems normal. Also I don't have the fan running full tilt or anything. Is this normal and safe for my computer?
The motherboard is vibrating? Well, given that fact and you said you are 99% sure you installed the cooler properly, I would say to check the screws that hold the Motherboard in place. Maybe they are too loose.