Samsung's 850 EVO M.2 solid-state drive reviewed
 

When we reviewed Samsung's 850 EVO SSD last year, we commented on its remarkably compact internals. Although the drive comes in a standard 2.5" case, the underlying circuit board occupies a fraction of that footprint. It was only a matter of time before Samsung rolled out miniaturized versions designed for smaller mSATA and M.2 form factors.

http://techreport.com/review/28025/s...drive-reviewed