SAMSUNG 840 EVO COMPONENTS
The exterior casing of the Samsung 840 EVO SSD consists of a smooth grey aluminum casing that holds the PCB in place by the base plate. Access to the PCB is accomplished through removal of three security screws on the base of the unit, two of which are found underneath the branding sticker. The branding sticker is consrtucted of a security tape and access to the screws is not possible without damage to the tape. Such damage would immediately void the warranty.
Our first look inside the new 840 EVO was definitely a surprise as, not so long ago, one couldn’t even find a 1TB SSD in a single PCB design. Not only is the EVO 1TB a single PCB, but its size is only a fraction of that of a typical notebook PCB. It would take no effort whatsoever for Samsung to double the NAND chips for a 2TB SSD of exactly the same size. To show just how small it really is, we have included a second shot with a business card on the right:
From there, we have a MASSIVE 1GB LPDDR2 DRAM cache on our sample 1TB SSD. All other capacities have also had their cache size upgraded with the 120GB getting 256MB, 250 and 500GB having 512MB and the 750GB also getting 1GB of cache.
For storage, the 840 EVO is equipped with eight modules of Samsung advanced 128Gb 3-Bit MLC (TLC) 2xnm class memory. Samsung was kind enough to clarify the size of memory at their recent 2013 Samsung Global SSD Summit in Seoul, South Korea, and it is 19nm. What is incredible however, is that each module is 128GB in capacity for a total of 1024GB RAW capacity…on a reduced size PCB.