Internals, Testing Methodology and System Setup


Opening an 840 EVO requires the removal of 3 pentalobe screws, two of which are hidden behind the drive label:

Once open we see the goods:

Samsung have opted for a 1.8" PCB, just as they did back with the 470 Series. While the 470 had 16 flash packages crammed within its smaller PCB, the 840 EVO enjoys much more free space.

The full 1TB is contained within only 8 flash packages, meaning Samsung is stacking those 19nm 128Gb dies 8-high within each package. It also means that if they choose to expand this to a full 2.5mm PCB design, Samsung could easily take this model to a 2TB (or higher) capacity point within a 2.5 inch package. Here's a final close-in shot of the new controller:

Testing Methodology

Our tests are a mix of synthetic and real-world benchmarks. PCMark, IOMeter, HDTach, HDTune, Yapt and our custom File Copy test round out the selection to cover just about all bases. If you have any questions about our tests just drop into the Storage Forum and we'll help you out! 

Test System Setup

We currently employ a pair of testbeds. Our trusty Z68 SandyBridge testbed sits along side a newer ASUS P8Z77-V Pro/Thunderbolt.Results between both boards have been +/- 2% of each other – well within the best data scatter of a typical benchmark.

PC Perspective would like to thank ASUS, Corsair, and Kingston for supplying some of the components of our test rigs. 

Hard Drive Test System Setup
CPU Intel Core i5-2500K
Motherboard Asus P8Z68-V Pro
Memory Kingston HyperX 4GB DDR3-2133 CL9
Hard Drive G.Skill 32GB SLC SSD
Sound Card N/A
Video Card Intel® HD Graphics 3000
Video Drivers Intel
Power Supply Corsair CMPSU-650TX
DirectX Version DX9.0c
Operating System Windows 7 X64
  • PCMark05
  • Yapt
  • IOMeter
  • HDTach
  • HDTune
  • PCPer File Copy Test
  • Write Caching Test


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