would kinda sound like something is running along one of the fan blades in your case. a grinding,
clicking or crunching noise. i personally have three and have installed a dozen H100 and 8 H80
and others with four (H60/80 growling noise and faulty pump/controller H70/100) making a grumbling
noise. simple RMA fixed all issues. the newest batch of RMA from july 23, 2012 of H100 were a new
improved model to replace nosiey pump/controllers. ideally, this is the best package for a new
user or enthusiast. easy on the budget and simple start to water-cooling. especailly if coming
from air cooling and if an RMA is needed, step back into air until the unit is replaced. it's computers
a crap shoot at best that there will be no errors or issues.
airdeano