[SOLVED] NVME performance degradation? - Sabrent Rocket 1tb

[ninfo]

So a few months ago I got myself the Sabrent Rocket NVME 1TB and was very pleased with it's performance.

Out of curiosity, after I freed it up from almost full, I ran a bench today and surprisingly there's a big difference specially in write speeds.

Is this normal?


Here's the bench of day-one after a fresh OS install, Aug 23rd

And here's today

 

[13thmonkey]

how full in the second image?

 

[ninfo]

how full in the second image?

You can see in the upper right corner the gb's occupied/total, 155/953 16%
Before freeing up yesterday it was around 800, I moved the files to an internal HDD
Might it be related to the sectors not being truly empty for some weird reason?

 

[ninfo]

Just an update:

Running the Windows "Defragment and optimise drives" app.
Make sure the drive is listed in there as a SSD, and if so, hit Optimise.
This forces it to do a TRIM.