SamsungMZ-7PD256BW
SamsungMZ-7KE256BW

Controller: Samsung 3-core MDX. Flash Memory: Samsung 21nm Toggle Mode MLC. Release date: Q4 2012.

Controller: Samsung Triple Core MEX. Memory: Samsung 40nm MLC V-NAND. Release date: Q3 2014.

Real World Speed
Performance profile from 99,353 user samples
34,589 User Benchmarks
Best Bench: 116% 238GB free
Worst Bench: 62% 105GB free (System drive)
Poor: 62% Great: 116%
SPEED RANK: 228th / 992
64,764 User Benchmarks
Best Bench: 126% 96GB free (System drive)
Worst Bench: 69% 157GB free (System drive)
Poor: 69% Great: 126%
SPEED RANK: 169th / 992
Effective Speed
Effective SSD Speed
91.5 % 104 % Slightly faster effective speed.
+14%
Read
Avg. Sequential Read Speed
454 MB/s 471 MB/s +4%
Write
Avg. Sequential Write Speed
357 MB/s 414 MB/s Faster write speed.
+16%
4K Read
Avg. 4K Random Read Speed
30.2 MB/s 33.8 MB/s Slightly faster random read.
+12%
4K Write
Avg. 4K Random Write Speed
84.1 MB/s 94.9 MB/s Slightly faster random write.
+13%
Mixed
Avg. Sequential Mixed IO Speed
289 MB/s 339 MB/s Faster mixed IO speed.
+17%
4K Mixed
Avg. 4K Random Mixed IO Speed
38.2 MB/s 44.6 MB/s Faster random mixed IO.
+17%
SusWrite
Avg. Sustained Write Speed
284 MB/s 360 MB/s Faster sustained write speed.
+27%
Read
Peak Sequential Read Speed
509 MB/s 516 MB/s +1%
Write
Peak Sequential Write Speed
480 MB/s 488 MB/s +2%
4K Read
Peak 4K Random Read Speed
36.3 MB/s 43.7 MB/s Faster peak random read.
+20%
4K Write
Peak 4K Random Write Speed
117 MB/s 130 MB/s Slightly faster peak random write.
+11%
Mixed
Peak Sequential Mixed IO Speed
355 MB/s 382 MB/s Slightly faster peak mixed IO speed.
+8%
4K Mixed
Peak 4K Random Mixed IO Speed
46.8 MB/s 58 MB/s Faster peak random mixed IO.
+24%
SusWrite
Peak Sequential Sustained Write 60s Average
477 MB/s 481 MB/s +1%
Market Share
Based on 12,966,448 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.27 % 0.5 % Hugely higher market share.
+85%
Value
Value For Money
78 % 104 % Much better value.
+34%
User Rating
UBM User Rating
63 % 95 % Much more popular.
+51%
Price
Price (score)
$120 $97 Cheaper.
+19%
Age
Newest
77 Months 56 Months More recent.
+27%
DQ Read
Peak 4K-64Thread Read Speed
384 MB/s 389 MB/s +1%
DQ Write
Peak 4K-64Thread Write Speed
333 MB/s 354 MB/s Slightly faster peak deep queue write.
+6%
AS-SSD Total
AS-SSD Total Score
1,222 Pts 1,280 Pts +5%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
175 MB/s 357 MB/s Hugely faster peak deep queue mixed IO.
+104%
ADQ Read
Avg. 4K-64Thread Read Speed
334 MB/s 348 MB/s +4%
ADQ Write
Avg. 4K-64Thread Write Speed
256 MB/s 304 MB/s Faster deep queue write.
+19%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
139 MB/s 308 MB/s Hugely faster deep queue mixed IO.
+122%
Capacity
Capacity
256GB 256GB
ADVERTISEMENT

The 840 Pro is stunning. Samsung have created a completely in-house package including both the controller and their own new 21nm toggle mode NAND. On release (Oct '12) this was the fastest performing deep queue depth consumer grade SSD available. Fast forward six months (Apr '13) and the 840 Pro still holds both the random read/write deep queue depth speed records of 384 MB/s and 326 MB/s, impressive considering how fast the SSD space tends to move. There are no obvious weaknesses, in-fact the 840 pro takes first place in nearly all of the speed categories and is only seriously rivalled by one drive, the OCZ Vector. To conclude, in terms of both outright performance, particularly server orientated, and value for money the 256GB and 128GB 840 Pros are amongst the top handful of drives currently available. [Jun '13 SSDrivePro]

MORE DETAILS

The 256GB Samsung 850 Pro is the fastest consumer SSD we have seen to date. Thanks to Samsung's new 3D V-NAND the 850 Pro has lower power consumption and better performance, albeit marginally, than both the 840 Evo and 840 Pro. Looking at the benchmark figures for the 840 and 850 Pros shows that the effective performance improvement is 10% whereas the 850 Pro beats the 840 Evo by 16%. These drives effectively saturate SATA 3.0 making it difficult to distinguish between them in day-to-day use. At current prices the 850 Pro is prohibitively expensive, prices need to drop by 15% before it approaches the 840 Pro from a value perspective. Samsung may release a value orientated 850 Evo soon, but for now "most" users are better off with the 840 Pro. [Oct '14 SSDrivePro]

MORE DETAILS

Solid State Drive Rankings (Price vs Performance) March 2019 SSD Rankings.

Welcome to our 2.5" and M.2 SSD comparison. We calculate effective speed for both SATA and NVMe drives based on real world performance then adjust by current prices per GB to yield a value for money rating. Our calculated values are checked against thousands of individual user ratings. The customizable table below combines these factors to bring you the definitive list of top SSDs. [SSDrivePro]

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Group Test Results

  • Best user rated - User sentiment trumps benchmarks for this comparison.
  • Best value for money - Value for money is based on real world performance.
  • Fastest real world speed - Real World Speed measures performance for typical consumers.
How Fast Is Your SSD? (Bench your build) Size up your PC in less than a minute.

Welcome to our freeware PC speed test tool. UserBenchmark will test your PC and compare the results to other users with the same components. You can quickly size up your PC, identify hardware problems and explore the best upgrades.

UserBenchmark of the month

How it works

  • - Download and run UserBenchMark.
  • - CPU tests include: integer, floating and string.
  • - GPU tests include: six 3D game simulations.
  • - Drive tests include: read, write, sustained write and mixed IO.
  • - RAM tests include: single/multi core bandwidth and latency.
  • - Reports are generated and presented on userbenchmark.com.
  • - Identify the strongest components in your PC.
  • - See speed test results from other users.
  • - Compare your components to the current market leaders.
  • - Explore your best upgrade options with a virtual PC build.
  • - Compare your in-game FPS to other users with your hardware.
  • - Share your opinion by voting.

 Frequently Asked Questions

 Best User Rated

The Best.
CPUGPUSSD
Intel Core i7-8700K $370Nvidia GTX 1070 $364Samsung 850 Evo 250GB $75
AMD Ryzen 5 1600 $120Nvidia GTX 1060-6GB $230Samsung 850 Evo 500GB $105
Intel Core i5-8600K $260Nvidia GTX 1080-Ti $808Samsung 850 Pro 256GB $97
HDDRAMUSB
Seagate Barracuda 1TB (2016) $43Corsair Vengeance LPX DDR4 3000 C15 2x8GB $105SanDisk Extreme 64GB $43
Seagate Barracuda 3TB (2016) $85G.SKILL Trident Z DDR4 3200 C14 4x16GB $761SanDisk Extreme 32GB $48
WD Blue 1TB (2012) $45Corsair Vengeance LPX DDR4 3200 C16 2x8GB $110SanDisk Ultra Fit 32GB $12
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