I may have spoken too soon... Now it's exhibiting a very fast buzzing sound, something like a fast clicking sound made by plastic maybe 10-15 times per second. Kind of disappointed now, since one of my goals was to eliminate annoying noises by watercooling. I will give you guys an update if anything changes..
Edit: Okay, it's quiet again, but not as silent as it was before. The ticking sound is much quieter. Hopefully it will go away with time.
Edit 2: Looks like it's come back now, very strange. I may have to check out the impeller, but it may be worth the hassle to let d-tek handle it
Edit 3: Ticking has slowed down considerably, now it sounds like a muffled hard drive seek sound. It is getting quieter.
Edit 4: Almost silent now!