I'm going to be the d-bag who doesn't read the thread and just posts, but one, controller will dictate throughput on writes so your controller and size of SSD matters.
2, I have never seen an SSD that benches exactly what the specs say.
3. Random writes are what really matter and your SSD kills your mechanical hard drive in that.
4. You really bought that SSD because access times are crazy fast compared to a mechanical, literally hundreds of times faster.
It should still feel much faster than your mechanical drive, people get too focused on sequential write or read numbers yet in everyday usage they matter the least.
Thank you everyone for your time and patience while I get used to my new techno-gizmo-thing-a-majig