I just installed 2 of the TennMax IO 5v fans this week in 2 i-openers. I have read here many times that people cut the RF shield on the IOs to reduce the noise level from these fans. After installing both fans and putting units back together, I am baffled as to why people think they have to cut the RF shields. They both run silent.. well ok yes you can here them but they are hardly noticable. I have placed one on our nighttable and my wife (who is a very light sleeper) didnt notice it at all.
Note that TennMax has displayed great service for me. I had purchased a number of these fans and TennMax was great while ordering them (via phone) and answered all questions. One of the clips snapped when I put it on the processor so I called them and was told that 2 sets of replacement clips were being shipped out to me right away that same day.
Great service and a quiet, solid fan as far as I'm concerned! I'll purchase more when I need them.
Hope this helps!
BTW... Question to others here who use these fans.. When my fans got here they had included Thermal Adhesive Tape but had not installed it on the fan. When I went to place it on the fan I noticed there was already a black rubber square compound on the heatsink. I simply took that off, cleaned the heatsink really well with rubbing alcohol (followed by the cpu as well) and applied the adhesive tape directly onto the heatsink and cpu.
What have others done? Did you use the fan simply as it was without the adhesive tape, replaced the black rubber with the tape or *gasp* apply the adhesive tape to the rubber?