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 69,973 user samples
22,850 User Benchmarks
Best Bench: 116% 39GB free
Worst Bench: 60% 91GB free (System drive)
Poor: 60% Great: 116%
SPEED RANK: 188th / 964
47,123 User Benchmarks
Best Bench: 124% 238GB free
Worst Bench: 76% 226GB free
Poor: 76% Great: 124%
SPEED RANK: 145th / 964
Effective Speed
Effective SSD Speed
92.5 % 105 % Slightly faster effective speed.
+14%
Read
Avg. Sequential Read Speed
457 MB/s 478 MB/s +5%
Write
Avg. Sequential Write Speed
360 MB/s 421 MB/s Faster write speed.
+17%
4K Read
Avg. 4K Random Read Speed
30.6 MB/s 34.1 MB/s Slightly faster random read.
+11%
4K Write
Avg. 4K Random Write Speed
86.1 MB/s 94.7 MB/s Slightly faster random write.
+10%
Mixed
Avg. Sequential Mixed IO Speed
290 MB/s 342 MB/s Faster mixed IO speed.
+18%
4K Mixed
Avg. 4K Random Mixed IO Speed
38.7 MB/s 44.8 MB/s Faster random mixed IO.
+16%
SusWrite
Avg. Sustained Write Speed
285 MB/s 363 MB/s Faster sustained write speed.
+27%
Read
Peak Sequential Read Speed
510 MB/s 516 MB/s +1%
Write
Peak Sequential Write Speed
484 MB/s 490 MB/s +1%
4K Read
Peak 4K Random Read Speed
36.6 MB/s 43.6 MB/s Faster peak random read.
+19%
4K Write
Peak 4K Random Write Speed
120 MB/s 127 MB/s Slightly faster peak random write.
+6%
Mixed
Peak Sequential Mixed IO Speed
362 MB/s 385 MB/s Slightly faster peak mixed IO speed.
+6%
4K Mixed
Peak 4K Random Mixed IO Speed
48 MB/s 57.2 MB/s Faster peak random mixed IO.
+19%
SusWrite
Peak Sequential Sustained Write 60s Average
478 MB/s 481 MB/s +1%
Market Share
Based on 9,661,539 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.4 % 0.64 % Much higher market share.
+60%
Value
Value For Money
40.8 % 71.2 % Much better value.
+75%
User Rating
UBM User Rating
63 % 96 % Much more popular.
+52%
Price
Price (score)
$289 $163 Much cheaper.
+44%
Age
Newest
73 Months 52 Months More recent.
+29%
DQ Read
Peak 4K-64Thread Read Speed
385 MB/s 388 MB/s +1%
DQ Write
Peak 4K-64Thread Write Speed
335 MB/s 354 MB/s Slightly faster peak deep queue write.
+6%
AS-SSD Total
AS-SSD Total Score
1,229 Pts 1,275 Pts +4%
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
338 MB/s 348 MB/s +3%
ADQ Write
Avg. 4K-64Thread Write Speed
260 MB/s 309 MB/s Faster deep queue write.
+19%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
140 MB/s 306 MB/s Hugely faster deep queue mixed IO.
+119%
Capacity
Capacity
256GB 256GB
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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) November 2018 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 $359Nvidia GTX 1070 $340Samsung 850 Evo 250GB $80
AMD Ryzen 5 1600 $130Nvidia GTX 1060-6GB $234Samsung 850 Evo 500GB $97
Intel Core i5-8600K $237AMD RX 480 $280Samsung 850 Pro 256GB $163
HDDRAMUSB
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $130SanDisk Extreme 64GB $43
Seagate Barracuda 3TB (2016) $85G.SKILL Trident Z DDR4 3200 C14 4x16GB $869SanDisk Extreme 32GB $48
WD Blue 1TB (2012) $45Corsair Vengeance LPX DDR4 3200 C16 2x8GB $130SanDisk Ultra Fit 32GB $12
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