Samsung 840 250GB SSD Review
A Closer Look at the Samsung 840 250GB
Here’s a look at the PCB layout for both the Samsung 840 and the Samsung 840 Pro. Can you spot the difference?
Here’s a look at the PCB for the Samsung 840 250GB. We’ve got 8 NAND packages, a controller, and DRAM cache.
Here’s a look at the bottom of the PCB.
Like the Samsung 840 Pro, the Samsung 840 SSD carries the new 4th generation tri-core Samsung MDX Cortex-R4 based SSD controller running at 300MHz. The specific model number on this controller is S4LN021X01-8030.
Like the Samsung 840 Pro 256GB, the Samsung 840 250GB has a 512MB LPDDR2 (Low Power DDR2) DRAM cache.
The only major difference in terms of hardware between the Samsung 840 and the 840 Pro is that with the Samsung 840, we get Samsung’s latest 21nm Toggle Mode TLC (3 bits per cell) NAND 2.0 (Model #K9CFGY8U5A-CCK0) whereas with the 840 Pro, we get Samsung’s latest 21nm Toggle Mode MLC (2 bits per cell) NAND 2.0.