I got my NV Silencer5 rev2 about 4 month ago. I was having major temp issue and the silencer brought them down a lot. But now just 4 months later the fan is making a horrid noise. Yes I have 9 other fans flowing air though so its getting a little dust in there but every single other fan is fine. I found out you don't really RMA a silencer. You take the silencer back to the store you got it from. They will order parts from Arctic-cooling and the dealer will repair it. I called micro center and they are just going to replace it for me. I think it's pretty weak that 4 months of use and this thing is shot. My load temp goes up about 10c when it making noise and the vibration slows the fan. I think I got mine for like $30. I wouldn't mind paying up to 50 as long as they get a good fan on there. O well, now I need to uninstall get some new AS5 and put the new one back on. GRRRR.