Samsung 840 Pro 

Released October, 2012
  • 512 GB
  • 2.5" SATA III
  • 256 MB
7.1 Out of 10

We also expect Samsung to remain in the SSD market space for the foreseeable future.
by Legit Reviews (Jan, 2013)
For the Samsung 840 Pro 512GB drive, the readout on CrystalDiskInfo 5.2.0 shows that both NCQ and S.M.A.R.T. are enabled, as well as TRIM and the interface is confirmed at SATA III (6Gbps).
by Legit Reviews (Jan, 2013)

SSDBoss Review Our evaluation of the Samsung 840 Pro

read performance

How quickly data is read from the drive

840 Pro
4K Random Read, 4K Random Read Access Time and 512K Sequential Read

write performance

How quickly data is written to the drive

840 Pro
4K Random Write, 4K Random Write Access Time and 512K Sequential Write

real world benchmarks

How well the drive performs common tasks

840 Pro
Windows 7 Boot-up Time, Photoshop Lens Filter and AS SSD ISO Copy


How well the drive performs on common benchmarks

840 Pro
Passmark Disk Rating, PCMark Vantage, AS SSD Score and 1 more


SSDBoss Score

read performance, write performance, real world benchmarks and Benchmarks

840 Pro

Benchmarks Real world tests of the Samsung 840 Pro

4K Random Read

840 Pro
311.34 MB/s
Intel 520
88.59 MB/s
Crucial M500
126.46 MB/s

4K Random Write

840 Pro
130.58 MB/s
Crucial M500
66.2 MB/s
Samsung 840
76.07 MB/s

Windows 7 Boot-up Time

840 Pro
7.8 s
Intel 520
11.3 s
10 s

Avg. Power Consumption

840 Pro
2 Watts
Intel 520
2.66 Watts
2.4 Watts

4K Random Read Access Time

840 Pro
1.91 ms
Crucial M500
3.78 ms
Samsung 840
3.29 ms

4K Random Write Access Time

840 Pro
0.8 ms
Intel 520
2.82 ms
Crucial M500
1.98 ms

Reviews Word on the street for the Samsung 840 Pro

The random read/write performance data from SiSoft Sandra that we also quote is a measure of a drive's sustained performance when reading and writing a contiguous block of information to a randomly chosen location.

Early last year the company caught the SSD market by surprise with the release of their 830 Series SSD, which was followed in late 2012 by the 840 and 840 Pro that provide awesome performance and focus not only on performance, but also on reliability and long-term performance stability.

So the big difference in terms of performance you can likely trace to the flash memory in each drive.


8.7 Out of 10

What People Are Saying Give it to me straight


Best SSD performance we've seen for less than $1 per GB.
by PCMag (May, 2013)
Our Steady State Performance Testing reveals that while Samsung has improved things considerably compared to the 830 Series, easily surpassing SandForce-based drives, the 840 Pro is unable to match OCZ's latest Vector SSD.
by techPowerUp!
Clearly this is one of the fastest consumer SSDs you can buy right now in terms of raw speed with its only real peer being the OCZ Vector drive powered by the Indilinx Barefoot 3 controller.
by Legit Reviews (Jan, 2013)


The chip's spec include three ARM Cortex R4 cores running at around 300MHz and the same controller you'll find in the much cheaper 840 non-pro.
by Tech Radar (Dec, 2012)
Aren't SSD prices supposed to be going down, not up?
by Tech Radar (Dec, 2012)
Technically, the 840 Pro should be very cheap to make for Samsung as all components, including the flash chips, are provided by Samsung itself, so we may see some price drops with more competition in the high-end market.
by techPowerUp!


The controllers can even use free-space in the user-area (the part of the SSD's NAND flash that isn't overprovisioned).
by techPowerUp!
Towards the end (the last 15 minutes), the SSD controller will have run out of such free space to provide a metric we call "steady state write performance.
by techPowerUp!
The flip side contains all components and even then it's not packed on with some extra green space present.
by Legit Reviews (Jan, 2013)


We talked a lot about the focus of SSD makers now that performance has hit a bit of a plateau while awaiting the next generation of SATA interfaces as well as alternative interfaces like PCIe.
by Legit Reviews (Jan, 2013)
For now, it shares the performance crown with the OCZ Vector drive for a SATA III drive.
by Legit Reviews (Jan, 2013)


It also leverages 21nm MLC Toggle 2.0 NAND which carries a longer endurance rating and is faster than the TLC variant.
by Legit Reviews (Jan, 2013)

Specifications Full list of technical specs


Capacity 512 GB
Cache 256 MB
Interface SATA III
Interface speed 6 Gbit/s
Controller Samsung MDX
Memory type MLC
NAND process size 21 nm
Maximum shock force 1,500G

form factor

Form factor 2.5"
Mfg warranty 5 years
Thickness 7 mm
Weight 53 g

manufacturer performance

Sequential read 540 MB/s
Sequential write 520 MB/s
Random read 100,000 IOPS
Random write 90,000 IOPS
Power consumption (Idle) 0.05 Watts
Power consumption (Active) 0.35 Watts
MTBF 1,500,000 hours
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this a geat ssd
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