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 154,692 user samples
20,841 User Benchmarks
Best Bench: 123% 149GB free
Worst Bench: 70% 107GB free
Poor: 70% Great: 123%
SPEED RANK: 57th / 853
133,851 User Benchmarks
Best Bench: 116% 117GB free
Worst Bench: 68% 63GB free
Poor: 68% Great: 116%
SPEED RANK: 63rd / 853
Effective Speed
Effective SSD Speed
99.1 % +4% 95 % -4%
Read
Avg. Sequential Read Speed
505 MB/s +1% 499 MB/s -1%
Write
Avg. Sequential Write Speed
442 MB/s Slightly faster write speed.
+13%
390 MB/s -13%
4K Read
Avg. 4K Random Read Speed
32.7 MB/s -16% 37.8 MB/s Faster random read.
+16%
4K Write
Avg. 4K Random Write Speed
89.8 MB/s Faster random write.
+16%
77.5 MB/s -16%
Mixed
Avg. Sequential Mixed IO Speed
462 MB/s Faster mixed IO speed.
+17%
395 MB/s -17%
4K Mixed
Avg. 4K Random Mixed IO Speed
32.9 MB/s -1% 33.2 MB/s +1%
Read
Peak Sequential Read Speed
529 MB/s +2% 517 MB/s -2%
Write
Peak Sequential Write Speed
502 MB/s Faster peak write speed.
+21%
416 MB/s -21%
4K Read
Peak 4K Random Read Speed
42 MB/s -13% 47.3 MB/s Slightly faster peak random read.
+13%
4K Write
Peak 4K Random Write Speed
127 MB/s Faster peak random write.
+17%
109 MB/s -17%
Mixed
Peak Sequential Mixed IO Speed
513 MB/s Faster peak mixed IO speed.
+22%
422 MB/s -22%
4K Mixed
Peak 4K Random Mixed IO Speed
50.4 MB/s +4% 48.3 MB/s -4%
Market Share
Based on 3,088,444 SSDs tested.
Market Share
Market Share (trailing 30 days)
1.22 % -681% 9.53 % Hugely higher market share.
+681%
Value
Value For Money
79.6 % -15% 91.2 % Slightly better value.
+15%
User Rating
UBM User Rating
97 % -16% 113 % More popular.
+16%
Price
Price (score)
$130 -23% $100 Cheaper.
+23%
Age
Newest
35 Months -14% 30 Months Slightly more recent.
+14%
DQ Read
Peak 4K-64Thread Read Speed
382 MB/s +1% 378 MB/s -1%
DQ Write
Peak 4K-64Thread Write Speed
342 MB/s Faster peak deep queue write.
+20%
284 MB/s -20%
AS-SSD Total
AS-SSD Total Score
1,254 Pts Slightly stronger server IO.
+7%
1,169 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
208 MB/s Slightly faster deep queue read.
+5%
198 MB/s -5%
ADQ Write
Avg. 4K-64Thread Write Speed
234 MB/s Faster deep queue write.
+23%
190 MB/s -23%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
87.7 MB/s Faster deep queue mixed IO.
+30%
67.6 MB/s -30%
Capacity
Capacity
256GB 250GB
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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) June 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 $307Nvidia GTX 1070 $390Samsung 850 Evo 250GB $100
AMD Ryzen 7 1700 $278AMD RX 480 $608Samsung 850 Pro 256GB $130
Intel Core i5-7600K $225Nvidia GTX 1060-6GB $239Samsung 850 Evo 500GB $160
HDDRAMUSB
Seagate Barracuda 1TB (2016) $42Corsair Vengeance LPX DDR4 3000 C15 2x8GB $127SanDisk Extreme 64GB $45
Seagate Barracuda 3TB (2016) $83G.SKILL Trident Z DDR4 3200 C14 4x16GB $696SanDisk Extreme 32GB $22
Seagate Barracuda 7200.14 1TB $46HyperX Fury DDR4 2133 C14 2x8GB $133SanDisk Ultra Fit 32GB $13
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