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need some explanation about three different "1T" Command Rates in BIOS (Z690)

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i currently run my old Trident Z Kit and it defaults to a 2T Command Rate.
on Ryzen it defaults to 1T and it is completely stable on Alder Lake as well.

Can someone explain me what the difference between 1N, N:1 and Real 1N is? all three are working and have no influence on performance or latency in AIDA.
20211208_031459.jpg
 
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Tigger

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I would be interested to know too, after putting my ADL setup together.
 
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Its not new. These extras have been around since at least 10th gen. What does it do? No idea myself. Never found any documentation on it.

N=T which means it would translate to 1:T and Real 1T.
 
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On my system, 1N is 1T, 2N is 2T, and Auto defaults to 2T. I don't know what the other options mean.
 
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