Samsung 840 Pro SSD Review
Samsung went with an aluminum body which has been anodized black and the edges have been trimmed and nickel plated. The company name is printed in the middle of the chassis. Aesthetically, Samsung is definitely making a difference here. The body of the 840 Pro also is only 7mm tall, allowing it to fit inside ultraportable devices as well, such as a large number of ultrabooks and tablets.
A standard sticker with the drive's specifications, bar codes, serial numbers and certifications has been placed on the bottom side of the chassis. Four TS5 Pentalobe “secure” screws hold the bottom cover of the 840 Pro in place. Tools for such screws are rather difficult to find, especially in Europe. There may be easier access to them in the US and Asia, due to their frequent use by Apple on their latest products.
As we mentioned before, Samsung is using their own in-house MDX controller, paired to 512MBs of LPDDR2-1066 RAM cache. The MDX controller is using three ARM R4s processing cores, each clocked at 300MHz, allowing it to run three different threads of commands at any instance.
As the 21nm MLC memory chips used in the 840 Pro are also built in-house, every microchip used in this SSD has been designed and fabricated by Samsung themselves. The use of MLC chips is the only vital difference between the 840 Pro and the 840, as the latter is using the latest TLC (triple level cell) chips, which do allow for greater data storage densities but are quite a bit slower and (in theory) less reliable than MLC chips.
Samsung supplies an interesting software with the 840Pro, the “Magician”. This software is mostly meant to be used as a diagnostic tool, however it also features options for benchmarking, firmware updates, secure erasing, even some basic optimization and overprovisioning options.