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


Controller: Marvell 88SS9189. Flash Memory: Micron 16nm MLC.

Real World Speed
Performance profile from 32,652 user samples
20,841 User Benchmarks
Best Bench: 123% 149GB free
Worst Bench: 70% 107GB free
Poor: 70% Great: 123%
SPEED RANK: 57th / 853
11,811 User Benchmarks
Best Bench: 95% 182GB free
Worst Bench: 59% 27GB free
Poor: 59% Great: 95%
SPEED RANK: 187th / 853
Effective Speed
Effective SSD Speed
99.1 % Faster effective speed.
80.3 % -23%
Avg. Sequential Read Speed
505 MB/s +3% 490 MB/s -3%
Avg. Sequential Write Speed
442 MB/s Much faster write speed.
320 MB/s -38%
4K Read
Avg. 4K Random Read Speed
32.7 MB/s Faster random read.
25.7 MB/s -27%
4K Write
Avg. 4K Random Write Speed
89.8 MB/s Slightly faster random write.
81.8 MB/s -10%
Avg. Sequential Mixed IO Speed
462 MB/s Faster mixed IO speed.
366 MB/s -26%
4K Mixed
Avg. 4K Random Mixed IO Speed
32.9 MB/s Much faster random mixed IO.
24.3 MB/s -35%
Peak Sequential Read Speed
529 MB/s +2% 521 MB/s -2%
Peak Sequential Write Speed
502 MB/s Much faster peak write speed.
331 MB/s -52%
4K Read
Peak 4K Random Read Speed
42 MB/s Much faster peak random read.
31.1 MB/s -35%
4K Write
Peak 4K Random Write Speed
127 MB/s Slightly faster peak random write.
120 MB/s -6%
Peak Sequential Mixed IO Speed
513 MB/s Faster peak mixed IO speed.
396 MB/s -30%
4K Mixed
Peak 4K Random Mixed IO Speed
50.4 MB/s Much faster peak random mixed IO.
33.7 MB/s -50%
Market Share
Based on 3,088,444 SSDs tested.
Market Share
Market Share (trailing 30 days)
1.22 % Hugely higher market share.
0.6 % -103%
Value For Money
79.6 % Slightly better value.
70.2 % -13%
User Rating
UBM User Rating
97 % Much more popular.
63 % -54%
Price (score)
$130 -11% $116 Slightly cheaper.
35 Months +3% 36 Months -3%
DQ Read
Peak 4K-64Thread Read Speed
382 MB/s Much faster peak deep queue read.
222 MB/s -72%
DQ Write
Peak 4K-64Thread Write Speed
342 MB/s Slightly faster peak deep queue write.
303 MB/s -13%
AS-SSD Total
AS-SSD Total Score
1,254 Pts Much stronger server IO.
920 Pts -36%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
165 MB/s Hugely faster peak deep queue mixed IO.
51.6 MB/s -220%
ADQ Read
Avg. 4K-64Thread Read Speed
208 MB/s Much faster deep queue read.
123 MB/s -69%
ADQ Write
Avg. 4K-64Thread Write Speed
234 MB/s Faster deep queue write.
201 MB/s -16%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
87.7 MB/s Hugely faster deep queue mixed IO.
35.3 MB/s -148%
256GB 256GB

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]


The Crucial MX100 is the first 16nm SSD to date. Aside from NAND, the MX100 shares the same hardware as its more expensive sibling, the M550. Comparing the MX100 and M550 shows that the two drives have similar read speeds but that the MX100 lags by nearly 50% at writing. The newer 16nm NAND reduces costs and accordingly the MX100 is the cheapest SSD (per GB) to date. In terms of performance the MX100 is a compromise which may or may not be worth making depending on individual circumstances. For typical desktop use including email, office documents and web browsing the MX100 is a great choice but power users should look elsewhere. Comparing the 250GB 840 EVO and 256GB MX100 shows that for a marginal premium, the Evo offers better write speeds. (Note: at 500GB they are more evenly matched) [Jun '14 SSDrivePro]


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
  • - 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.
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
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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