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How exactly do nm's work in a cpu? - Page 2

post #11 of 20
I've always thought of it as the distance between the circuit's pathways
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post #12 of 20
I read that it's just the thickness of the "slice" of silicon.

So 22nm is a thinner "slice".

So, my cores are 32nm thick.
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post #13 of 20
Quote:
Originally Posted by TwoCables View Post
I read that it's just the thickness of the "slice" of silicon.

So 22nm is a thinner "slice".

So, my cores are 32nm thick.
If that were the case, a larger nm chip of the same architecture would be cooler. I think its time for me to do some googling.
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post #14 of 20
Ah, good old google.

the nm distance refers to the "typical half-pitch (i.e., half the distance between identical features in an array)."
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post #15 of 20
Oh! It's just the size of each transistor.
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post #16 of 20
"Those are typically the feature size. That is to say, it is the smallest "cut" that the fabrication method can make into the silicon. If one were to carve out a transistor on the surface of a silicon wafer, one has to be able to etch to a certain degree of precision. If the smallest cut you can make into the silicon is, say, 11nm, then in order to make a piece of a transistor, you'll need to cut a small square (really a dot) and then leave a space for the next cut."

So in short, it's the size of the transistors as previously stated.
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post #17 of 20
Quote:
Originally Posted by TwoCables View Post
Oh! It's just the size of each transistor.
Yep, if I remember correctly, I believe it's usually measured Gate to Gate.
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post #18 of 20
Quote:
Originally Posted by TwoCables View Post
It's a thinner "slice".

So, the giant "wafer" that has all of the CPUs is thinner.
Wafers are thousands of nm thick, even on CPUs built on a 32nm process.

Quote:
Originally Posted by remer View Post
a nanometer(nm) is .000000001 meters. The "wiring" has a certain amount of resistance, therefore produces a certain amount of heat. The smaller something can be made, the less heat it will produce. Because it produces less heat, the clock speed can be increased, which will increase performance.
Lesser thickness has increased resistance.

Smaller transistors need less power to switch, even though they have higher resistance and leakage.

Lower power chips of a given process size actually have thicker gates.

Quote:
Originally Posted by Rowey View Post
lower number in nm = improved architecture
Not always.

Architecture and manufacturing process are largely separate. The both influence eachother, but it's perfectly possible to shrink an inferior architecture on a much smaller process than a superior one.
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post #19 of 20

Ha, I thought this was fun to watch and slightly educational in regards to this subject:

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post #20 of 20
Thread Starter 
wow *mind blown* thanks everyone that's interesting to find out.
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