Too sad! I tested it today as follows.
I disconnected my "ultra silent" (should be max 18 dB) Coolermaster Hyper 48 Fan and boot the PC with only the Cavalier T01 PSU fan and the front+rear fan. It was almost totally silent!
Switched off PC, connected it again and tried to boot again ==> it was like a Tornado starting
Looking at the fan, it don't look any damaged, but I can comment furthermore about a possibly defective unit.
I also turned on a different PC having Pentium 4 with the CPU FAN coming from Intel (the one defined as "noisy" in more than one forum...) and I can say Hyper 48 is at least 5-6 times more noisy than the Intel one
Problem: I bought Hyper 48 @ Pixmania (http://www.pixmania-pro.com/gui_web/home/index.php) and in case of a defective unit you should ship back to them the unit, they evaluate it and will ship a replacement consequently, with all the expenses paid by the customer.
If you think that cost for the fan is 44 Ã¢â€šÂ¬ and expenses for sending back+forth are 15+15 Ã¢â€šÂ¬ it's clear that tere is no big advantage in trying to repair a possibly defective unit...
Questions then are: from my previous note do you estimate it could be a defective unit?
Do you have an italian subsidiary I can deal with for the RMA?
Thanks in advance for patience and assistance.
Have a good sunday.