Hard drive was de fragged before this post, the processor on the benchmark rig was an i7 6700k.
But my FPS still shouldn't be this bad, this is s 1440p card for Christ sake!
Surprise surprise, the game is running on an SSD.
I think I need to make a call to power spec.
So, is the drive an SSD or not? If it is, you are going to ruin it if it defragged because SSDs only need to use "trim" feature.
Before you can appreciate what TRIM does, you'll first have to know this: Left unchecked, the performance of a SSD will deteriorate with use. This is due to the awkward way that solid state drives overwrite data to areas that already contain information.
Example: You copy a file to your brand new SSD. Since the file is being copied to a fresh blank space, the SSD is able to write the data directly at full speed. When you delete this file later, it is not instantly removed from the SSD - Instead the operating system simply marks the space taken up by the file as "not in use".
When the operating system requires more space, it will simply overwrite this "not in use" zone. A traditional hard disk drive is able to overwrite data in one single operation, but a solid state drive first has to erase all data in this "not in use" space before it is able to record the new data.
This awful situation is compounded by the fact that solid state drives are only able to delete data in large 512 kB blocks so this slows down the entire overwriting process even more.
Here's how SSD TRIM saves the day: When you delete a file from your SSD, the operating system will still mark the file space as "not in use"... but in addition, a TRIM command is sent to wipe that marked space clean. That way, your SSD is able to write data to that marked space as if it was brand new and skip the cumbersome deletion process.
That's why TRIM is so crucial: It makes sure that your SSD performance doesn't degrade with use, and keeps it (nearly) as fast as new.