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:
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|
|Video Card||Intel® HD Graphics 3000|
|Power Supply||Corsair CMPSU-650TX|
|Operating System||Windows 7 X64|
- PCPer File Copy Test
- Write Caching Test