For these past 2 days now, whenever I power up my pc the front intake fan starts making a loud grinding noise. It goes on for 2 minutes, then it goes silent. At first I thought something was in the way and the fan was hitting it, but no. There is no dirt either. I watched it closely, and it appears that it spins slightly slower during boot, and when the noise stops it's spinning faster. But it might have always been like that and not the cause of the problem - I never really checked out whether the case fans spin slower during boot (like my cpu fan does). Is it possible that this fan is giving up? The case is a NZXT Switch 810 and I purchased it brand new August 2012!