I want to try an XP90C because I hear it the best in air cooling....even if it's a degree or two over the XP120 and I have some really good 120mm fans lying around that would be perfect. So, I want to know if I can use a 120mm fan with an XP90C ? Do I need a 92-120mm fan adaptor ? If not how will I mount it ? Oh, and would it give better cooling than a 92mm fan will give ?