How do I measure case fan size?
I'm noob here,
Can someone give me a straightforward answer on how to measure a fan size? I've found the following answers in various web places, which are all different on my fan:
1) measure the distance between the mounting holes
2) measure the outside of the case
3) measure the blades from tip-to-tip.
Perhaps someone could take a fan that they know is an 80mm fan, for example, and measure to find out what exactly it is that's 80mm?