SamsungMZ-7KE256BW
SamsungMZ-7PD256BW

Controller: Samsung Triple Core MEX. Memory: Samsung 40nm MLC V-NAND

Controller: Samsung 3-core MDX. Flash Memory: Samsung 21nm Toggle Mode MLC.

Real World Speed
Performance profile from 32,993 user samples
21,101 User Benchmarks
Best Bench: 123% 161GB free
Worst Bench: 69% 13GB free
Poor: 69% Great: 123%
SPEED RANK: 50th / 848
11,892 User Benchmarks
Best Bench: 107% 41GB free
Worst Bench: 54% 110GB free
Poor: 54% Great: 107%
SPEED RANK: 139th / 848
Effective Speed
Effective SSD Speed
99 % Faster effective speed.
+19%
83.4 % -19%
Read
Avg. Sequential Read Speed
505 MB/s +3% 492 MB/s -3%
Write
Avg. Sequential Write Speed
441 MB/s Faster write speed.
+24%
357 MB/s -24%
4K Read
Avg. 4K Random Read Speed
32.8 MB/s Slightly faster random read.
+13%
28.9 MB/s -13%
4K Write
Avg. 4K Random Write Speed
89.7 MB/s Faster random write.
+15%
77.8 MB/s -15%
Mixed
Avg. Sequential Mixed IO Speed
460 MB/s Faster mixed IO speed.
+18%
389 MB/s -18%
4K Mixed
Avg. 4K Random Mixed IO Speed
33.8 MB/s Much faster random mixed IO.
+54%
21.9 MB/s -54%
Read
Peak Sequential Read Speed
530 MB/s +1% 523 MB/s -1%
Write
Peak Sequential Write Speed
502 MB/s +3% 486 MB/s -3%
4K Read
Peak 4K Random Read Speed
42.1 MB/s Faster peak random read.
+15%
36.5 MB/s -15%
4K Write
Peak 4K Random Write Speed
130 MB/s Slightly faster peak random write.
+12%
116 MB/s -12%
Mixed
Peak Sequential Mixed IO Speed
514 MB/s +1% 508 MB/s -1%
4K Mixed
Peak 4K Random Mixed IO Speed
50.3 MB/s Much faster peak random mixed IO.
+76%
28.6 MB/s -76%
Market Share
Based on 2,636,844 SSDs tested.
Market Share
Market Share (trailing 30 days)
1.5 % Hugely higher market share.
+88%
0.8 % -88%
Value
Value For Money
72.9 % Much better value.
+64%
44.5 % -64%
User Rating
UBM User Rating
91 % Much more popular.
+42%
64 % -42%
Price
Price (score)
$146 Much cheaper.
+35%
$224 -35%
Age
Newest
33 Months Much more recent.
+39%
54 Months -39%
DQ Read
Peak 4K-64Thread Read Speed
383 MB/s +2% 376 MB/s -2%
DQ Write
Peak 4K-64Thread Write Speed
342 MB/s Slightly faster peak deep queue write.
+7%
321 MB/s -7%
AS-SSD Total
AS-SSD Total Score
1259 Pts +5% 1,199 Pts -5%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
165 MB/s Hugely faster peak deep queue mixed IO.
+86%
88.8 MB/s -86%
ADQ Read
Avg. 4K-64Thread Read Speed
198 MB/s +4% 190 MB/s -4%
ADQ Write
Avg. 4K-64Thread Write Speed
219 MB/s Faster deep queue write.
+15%
190 MB/s -15%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
85.3 MB/s Much faster deep queue mixed IO.
+67%
51.2 MB/s -67%
Capacity
Capacity
256GB 256GB
ADVERTISEMENT

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

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

Solid State Drive Rankings (Price vs Performance) April 2017 SSD Rankings.

Welcome to our consumer SSD comparison. We calculate effective speed based on real world performance then adjust by cost per GB to yield a value for money rating. Calculated values don't always tell the whole picture so we check them against thousands of individual user ratings. The customizable table below combines these factors and more to bring you the definitive list of top SSDs. Share your opinion by voting. [SSDrivePro]

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 (UBM).
  • - CPU tests include: integer, floating and string.
  • - GPU tests include: six 3D game simulations.
  • - Drive tests include: read, write and mixed IO.
  • - Checks include: 4k Align, NCQ, TRIM, SATA, USB & S.M.A.R.T.
  • - 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 highest voted in class.
  • - Find the best upgrades.
  • - Share your opinion by voting.

 Frequently Asked Questions

 Best User Rated

The Best.
CPUGPUSSD
Intel Core i7-7700K $300Nvidia GTX 1070 $330Samsung 850 Evo 250GB $100
Intel Core i5-7600K $229AMD RX 480 $238Samsung 850 Pro 256GB $146
Intel Pentium G4560 $60Nvidia GTX 1060-6GB $219Samsung 850 Evo 500GB $179
HDDRAMUSB
Seagate Barracuda 1TB (2016) $50Corsair Vengeance LPX DDR4 3000 C15 2x8GB $127SanDisk Extreme 64GB $33
Seagate Barracuda 3TB (2016) $90G.SKILL Trident Z DDR4 3200 C14 4x16GB $700SanDisk Extreme 32GB $22
Seagate Barracuda 7200.14 1TB $46HyperX Fury DDR4 2133 C14 2x8GB $114SanDisk Ultra Fit 32GB $13
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