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 374,991 user samples
47,290 User Benchmarks
Best Bench: 121% 66GB free
Worst Bench: 70% 79GB free
Poor: 70% Great: 121%
SPEED RANK: 111th / 929
327,701 User Benchmarks
Best Bench: 114% 5GB free
Worst Bench: 68% 15GB free
Poor: 68% Great: 114%
SPEED RANK: 118th / 929
Effective Speed
Effective SSD Speed
97.8 % +4% 93.9 %
Read
Avg. Sequential Read Speed
504 MB/s +1% 500 MB/s
Write
Avg. Sequential Write Speed
434 MB/s Slightly faster write speed.
+11%
391 MB/s
4K Read
Avg. 4K Random Read Speed
32.6 MB/s 37.3 MB/s Slightly faster random read.
+14%
4K Write
Avg. 4K Random Write Speed
87.9 MB/s Faster random write.
+16%
75.8 MB/s
Mixed
Avg. Sequential Mixed IO Speed
453 MB/s Slightly faster mixed IO speed.
+14%
396 MB/s
4K Mixed
Avg. 4K Random Mixed IO Speed
33.7 MB/s +3% 32.8 MB/s
Read
Peak Sequential Read Speed
529 MB/s +2% 517 MB/s
Write
Peak Sequential Write Speed
502 MB/s Faster peak write speed.
+20%
417 MB/s
4K Read
Peak 4K Random Read Speed
42.5 MB/s 46.1 MB/s Slightly faster peak random read.
+8%
4K Write
Peak 4K Random Write Speed
123 MB/s Faster peak random write.
+19%
103 MB/s
Mixed
Peak Sequential Mixed IO Speed
514 MB/s Faster peak mixed IO speed.
+22%
422 MB/s
4K Mixed
Peak 4K Random Mixed IO Speed
49.7 MB/s +4% 47.6 MB/s
Market Share
Based on 7,227,843 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.74 % 6.01 % Hugely higher market share.
+712%
Value
Value For Money
80.9 % 87.6 % Slightly better value.
+8%
User Rating
UBM User Rating
97 % 126 % More popular.
+30%
Price
Price (score)
$125 $104 Cheaper.
+17%
Age
Newest
47 Months 42 Months Slightly more recent.
+11%
DQ Read
Peak 4K-64Thread Read Speed
374 MB/s +2% 367 MB/s
DQ Write
Peak 4K-64Thread Write Speed
338 MB/s Faster peak deep queue write.
+21%
279 MB/s
AS-SSD Total
AS-SSD Total Score
1,235 Pts Slightly stronger server IO.
+8%
1,139 Pts
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
158 MB/s Much faster peak deep queue mixed IO.
+31%
121 MB/s
ADQ Read
Avg. 4K-64Thread Read Speed
192 MB/s +3% 186 MB/s
ADQ Write
Avg. 4K-64Thread Write Speed
212 MB/s Faster deep queue write.
+18%
179 MB/s
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
83.4 MB/s Faster deep queue mixed IO.
+24%
67 MB/s
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]

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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 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 - Sometimes benchmarks get it completely wrong...
  • Fastest real world speed - Real World Speed measures performance for typical consumers.
  • Best value for money - Value for money is based on real world performance, price and capacity.
  • Raw speed comparison - Raw speed readings.
  • Details ordered by value - Detailed performance stats ordered by overall value for money.
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 i7-8700K $317Nvidia GTX 1070 $413Samsung 850 Evo 250GB $104
AMD Ryzen 5 1600 $160Nvidia GTX 1060-6GB $270Samsung 850 Evo 500GB $125
Intel Core i5-8600K $239AMD RX 480 $280Samsung 850 Pro 256GB $125
HDDRAMUSB
Seagate Barracuda 1TB (2016) $44Corsair Vengeance LPX DDR4 3000 C15 2x8GB $177SanDisk Extreme 64GB $44
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $911SanDisk Extreme 32GB $30
Seagate Barracuda 2TB (2016) $59HyperX Fury DDR4 2133 C14 2x8GB $226SanDisk Ultra Fit 32GB $12
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