Getting the right iMac G5 (first generation) fan

简介

I was surprised to find that the top right fan on the G5 iMac (first generation) changed design; one had 36 blades and gave an annoying whine, while the other design has 29 (a prime number) and yields a comforting hum.

步骤 1 Getting the right iMac G5 (first generation) fan

Getting the right iMac G5 (first generation) fan, Getting the right iMac G5 (first generation) fan: 步骤 1 中的图像 1，2

Getting the right iMac G5 (first generation) fan, Getting the right iMac G5 (first generation) fan: 步骤 1 中的图像 2，2

To the left is the desirable design and to the right the one that generates more noise.
ifixit carries both designs and was most helpful in ensuring that I got the correct one.
Another way to tell the difference is that the bad design is attached with cross head screws, while the good design is attached with torx screws; however the old screws can be used on a new fan.