It depends on what type of RAM it is. Each type of RAM has different notches to prevent you from installing the wrong type by accident.
A tubing notcher is a device used in construction-type activities. There are several different sizes of notches available. These notches attach onto a drill to cut the perfect size notches.
These are the different widths needed for ranges. the more notches (range from 1-5 notches) the wider the pattern of BBs
A skeet choke which is 5 notches
since their has been many different types of ram created over the years a unique notch insures that you can only use the correct type of ram that works with your motherboard.
To determine different shot patterns
1 notch
The test notches for the impact specimens for the tests have different dimensions.
open = 5 notches 1/4 = 4 notches 1/2 = 3 notches 3/4 = 2 notches full = 1 notch
A groove in the pelvis
Notches on the Choke TubeMost standard choke tubes have notches on their ends. The notches can be used to identity your choke tube, but they can be difficult to see. The following list shows what kind of choke the number of notches designate:1. One notch is a Full choke. (/)2. Two notches is an Improved Modified choke (//)3. Three notches is a Modified choke (///)4. Four notches is an Improved Cylinder choke (////)5. Five notches is a Skeet (or Cylinder) choke (/////)
1 notch - full choke 2 notches - improved modified 3 notches - modified 4 notches - improved cylinder 5 notches - skeet no notch - cylinder