Internals, Testing Methodology and System Setup


The 840 uses the same pentalobe screws as the 840 Pro, and required the use of an iFixit Pro Tech Toolkit to see the guts:

These are #5 pentalobe screws, FYI. This is the size used for the screws tyically used to crack open a MacBook Air.

Once inside we see the same identical PCB design as that used on the 840 Pro:

The same chip count is present, and though the 840 (left) is only 250GB, the 500GB model will also use the same 8 flash packages, making for 64GB per package (62.5GB after taking overprovisioning into account). Now for some closer chip shots:

Left: 840 | Right: 840 Pro

Controller: Triple core Arm Cortex MDX @ 300MHz
RAM: Samsung DDR 2, 512MB
Flash: 2x-nm class Samsung DDR2 toggle-mode (TLC) NAND, running at 400 Mbps per channel.

Here is the family shot of all prior Samsung SSD models for reference:

From left: FlashSSD 32GB SLC, PB22J (OEM), 470 Series, 830 Series, 840 Series

Testing Methodology

Our tests are a good 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're currently qualifying a new Z77 testbed along with some new (non-standard) benches, but there are a few more kinks to work out for consistent results. I'm therefore sticking with our tried and true Z68 SandyBridge unit for this piece. 

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

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


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