SamsungMZ-7KE256BW
SamsungMZ-75E250B

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

Controller: Samsung Dual Core MGX. Memory: Samsung 40nm TLC V-NAND

Real World Speed
Performance profile from 131,928 user samples
21,101 User Benchmarks
Best Bench: 123% 161GB free
Worst Bench: 69% 13GB free
Poor: 69% Great: 123%
SPEED RANK: 50th / 848
110,827 User Benchmarks
Best Bench: 117% 117GB free
Worst Bench: 68% 105GB free
Poor: 68% Great: 117%
SPEED RANK: 57th / 848
Effective Speed
Effective SSD Speed
99 % +5% 94.6 % -5%
Read
Avg. Sequential Read Speed
505 MB/s +1% 498 MB/s -1%
Write
Avg. Sequential Write Speed
441 MB/s Slightly faster write speed.
+13%
391 MB/s -13%
4K Read
Avg. 4K Random Read Speed
32.8 MB/s -17% 38.3 MB/s Faster random read.
+17%
4K Write
Avg. 4K Random Write Speed
89.7 MB/s Faster random write.
+15%
77.9 MB/s -15%
Mixed
Avg. Sequential Mixed IO Speed
460 MB/s Faster mixed IO speed.
+16%
395 MB/s -16%
4K Mixed
Avg. 4K Random Mixed IO Speed
33.8 MB/s +4% 32.6 MB/s -4%
Read
Peak Sequential Read Speed
530 MB/s +3% 517 MB/s -3%
Write
Peak Sequential Write Speed
502 MB/s Faster peak write speed.
+20%
417 MB/s -20%
4K Read
Peak 4K Random Read Speed
42.1 MB/s -14% 47.8 MB/s Slightly faster peak random read.
+14%
4K Write
Peak 4K Random Write Speed
130 MB/s Faster peak random write.
+18%
110 MB/s -18%
Mixed
Peak Sequential Mixed IO Speed
514 MB/s Faster peak mixed IO speed.
+22%
422 MB/s -22%
4K Mixed
Peak 4K Random Mixed IO Speed
50.3 MB/s +4% 48.3 MB/s -4%
Market Share
Based on 2,637,054 SSDs tested.
Market Share
Market Share (trailing 30 days)
1.5 % -467% 8.5 % Hugely higher market share.
+467%
Value
Value For Money
72.9 % -25% 90.9 % Better value.
+25%
User Rating
UBM User Rating
91 % -19% 108 % More popular.
+19%
Price
Price (score)
$146 -32% $100 Much cheaper.
+32%
Age
Newest
33 Months -15% 28 Months More recent.
+15%
DQ Read
Peak 4K-64Thread Read Speed
383 MB/s +1% 378 MB/s -1%
DQ Write
Peak 4K-64Thread Write Speed
342 MB/s Faster peak deep queue write.
+20%
285 MB/s -20%
AS-SSD Total
AS-SSD Total Score
1259 Pts Slightly stronger server IO.
+7%
1,172 Pts -7%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
165 MB/s Much faster peak deep queue mixed IO.
+40%
118 MB/s -40%
ADQ Read
Avg. 4K-64Thread Read Speed
198 MB/s Slightly faster deep queue read.
+6%
187 MB/s -6%
ADQ Write
Avg. 4K-64Thread Write Speed
219 MB/s Faster deep queue write.
+18%
186 MB/s -18%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
85.3 MB/s Much faster deep queue mixed IO.
+31%
65.3 MB/s -31%
Capacity
Capacity
256GB 250GB
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 250GB Samsung 850 Evo has a similar architecture to its hugely successful predecessor, the 840 Evo. Both drives are TLC based but the 850 uses 3D V-NAND as opposed to regular NAND. Both drives also feature a Turbowrite cache (TWC) which buffers up to 3GB of writes. The TWC enables high burst write speeds but when the cache exhausts write speeds drop to 300 MB/s. Comparing the 850 and 840 Evos shows that effective speed, has improved by 11% and the warranty has been extended from three to five years but prices are also up by 11%. The 850 Evo does put in superb benchmarks (second only to the 850 Pro) but these are only valid within the TWC. At current price levels the 850 Evo struggles to compete with the value leaders[Dec '14 SSDrivePro]

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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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