A CLOSER LOOK INSIDE
When we first separate the two halves of the S80’s case, we find the PCB to be screwed down to the back half of the case. The visible side shows eight of the drive’s sixteen NAND chips attached to the teal/turquoise circuit board. Combined with the other eight NAND chips on the controller side of the PCB, the total of 16 chips of 16GB capacity each yields a raw storage total of 256GB, which results in the 240GB of advertised capacity after firmware, overprovisioning, and controller overhead requirements.
Unscrewing the PCB from the rear half of the case reveals the controller side of the S80, with its octet of 16GB NAND chips, the Phison PS3108 controller, as well as a NANYA DRAM chip alongside the controller.
The NAND chips being utilized are part number TT57G2LAPA, which are Toshiba 19nm MLC flash memory.
Next we see a close-up of the Phison PS3108-S8 controller, which is an 8-channel device that can support up to 64 MLC or SLC NAND chips, and up to 4GB of DDR4 cache. The PS3108-S8 features built-in static and dynamic wear-leveling, power-saving capabilities, and a built-in regulator that supports both 3.3V and 1.8V Flash I/O.
The NANYA DRAM chip’s close-up shows a part number of NT5CC256M1GCP-D1. Referring to NANYA’s own part numbering guide on their website indicates that this chip contains 512MB of DDR3-1600 DRAM memory.