Question slow gen 4 nvme

Feb 9, 2022
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i have a slow running gen 4 nvme but when i got it it ran so fast and its not full and its the 980 pro from samsung
 
How do you know it is slow?

Speeds now, speeds then?

Measured by what......a benchmark tool or transferring personal files or what?

There's all kinds of possible explanations but you haven't provided much info on the circumstances or your other components.