Whats an "nm"?

hascet

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I've been looking into new processors and was just wondering what an "nm" stood for and what it was referring to when it said like 90nm or 65nm, and from what I understand it the lower the number the better?
 
A nanometer is a form of measurement for length

The smaller the "nm" on a cpu is, the smaller the parts are. The smaller the parts, the less heat (usually)
 
and less power. Meaning, the nanometer in a waffle is 65. Small stuff, but more performent and also produces less power.
 
A nanometer is a unit of measurement that is 10^-9 meter (10 to the power of -9), or one billionth of a meter (pretty damn small)
 
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