" and the speeds for it have slowly decreased over time"
My speeds cut in half overnight. Faster, actually.
I secure erased yesterday, fresh install, added updates and drivers, good speeds.
Added my programs, speed cut in half. The 256 GB drive is less than a third full.
OCZ says I need to replace it. Tech support is having me run ATTO in I/O Comparison mode to test for a bad drive. It's a pass or fail test.
We shall see........