What is the size difference between 80mm and 92mm (don't tell me 12mm)? I have a standard Enlight ATX case with the fan mount thingy in bottom front and rear fan mounting holes/grill near the CPU location. I'm not 100% sure of what size fans I have, but I'm pretty sure they are 80mm Sunon fans. They are the standard fans that came with the case (pretty sure they are standard in many cases). 1 fan sucking in front bottom and 1 fan blowing out rear. Anyway, I've read that upgradcing to 92mm fans will substantially increase air-flow in my case so will the 92mm fans fit just the same as the 80mm fnas or do I have to mod something to make them fit?