Summary: Received new fan the very next day after placing my order, was very impressed. The fan installed easily (hint: lay your tower on its side). CPU temp is 11 degrees C. cooler with this fan. BUT, it is 2 - 3 times noisier than the old fan that had a bad bearing in it. I am concerned that the higher noise level translates into greater vibration level on my motherboard so I will be looking for a quieter fan.