Why does partially full RAM cause lag?

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Chapters
00:00 Question
00:42 Accepted answer (Score 71)
05:06 Answer 2 (Score 28)
05:39 Answer 3 (Score 4)
07:53 Answer 4 (Score 1)
10:44 Thank you

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Full question
https://superuser.com/questions/1245041/...

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Tags
#memory

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