They are always either Samsung 840 or 850 PRO - so according to that test they should last much longer than they do. But they don't - I suspect it's the nature of what we're doing that's killing them, it's almost all random writes, very little sequential writing. Techreport did sequential writes - so each cell was only written once per pass, while when I write 1TB of data to my drive majority of it might be focused in the same area - sure broken cells they will get moved around but the drive will run out of cells to relocate to after a while.