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

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

Real World Speed
Performance profile from 28,397 user samples
7,102 User Benchmarks
Best Bench: 100% 126GB free
Worst Bench: 59% 95GB free
Poor: 59% Great: 100%
SPEED RANK: 181st / 908
21,295 User Benchmarks
Best Bench: 107% 207GB free
Worst Bench: 55% 102GB free
Poor: 55% Great: 107%
SPEED RANK: 166th / 908
Effective Speed
Effective SSD Speed
82.9 % 84.2 % +2%
Avg. Sequential Read Speed
500 MB/s +1% 493 MB/s
Avg. Sequential Write Speed
367 MB/s +1% 363 MB/s
4K Read
Avg. 4K Random Read Speed
26.9 MB/s 28.8 MB/s Slightly faster random read.
4K Write
Avg. 4K Random Write Speed
70.3 MB/s 78.5 MB/s Slightly faster random write.
Avg. Sequential Mixed IO Speed
374 MB/s 396 MB/s Slightly faster mixed IO speed.
4K Mixed
Avg. 4K Random Mixed IO Speed
24.2 MB/s Slightly faster random mixed IO.
22.3 MB/s
Peak Sequential Read Speed
527 MB/s +1% 523 MB/s
Peak Sequential Write Speed
399 MB/s 495 MB/s Faster peak write speed.
4K Read
Peak 4K Random Read Speed
32.6 MB/s 36.1 MB/s Slightly faster peak random read.
4K Write
Peak 4K Random Write Speed
99.6 MB/s 113 MB/s Slightly faster peak random write.
Peak Sequential Mixed IO Speed
416 MB/s 509 MB/s Faster peak mixed IO speed.
4K Mixed
Peak 4K Random Mixed IO Speed
33.9 MB/s Faster peak random mixed IO.
29 MB/s
Market Share
Based on 6,038,103 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.14 % 0.27 % Hugely higher market share.
Value For Money
63.9 % Much better value.
37.1 %
User Rating
UBM User Rating
68 % Slightly more popular.
63 %
Price (score)
$134 Much cheaper.
38 Months Much more recent.
65 Months
DQ Read
Peak 4K-64Thread Read Speed
348 MB/s 369 MB/s Slightly faster peak deep queue read.
DQ Write
Peak 4K-64Thread Write Speed
276 MB/s 322 MB/s Faster peak deep queue write.
AS-SSD Total
AS-SSD Total Score
1,075 Pts 1,187 Pts Slightly stronger server IO.
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
66.8 MB/s 90.5 MB/s Much faster peak deep queue mixed IO.
ADQ Read
Avg. 4K-64Thread Read Speed
176 MB/s 196 MB/s Slightly faster deep queue read.
ADQ Write
Avg. 4K-64Thread Write Speed
172 MB/s 194 MB/s Slightly faster deep queue write.
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
43.4 MB/s 53.3 MB/s Faster deep queue mixed IO.
250GB 256GB

The 250GB Crucial MX200 is successor to the hugely successful MX100. Both drives use the same NAND and controller but the new MX200 features Dynamic Write Acceleration (DWA) which is a new dynamically sized SLC cache. Samsung were the first to introduce SLC caching on the 840 Evo nearly two years ago so Crucial are somewhat late to the party. SLC caches generally only help performance in corner case real word scenarios and benchmarks. I prefer drives without SLC caches because they offer more consistent and sustainable real world IO. Comparing the MX100 and MX200 shows that the newer MX200 has a significantly faster peak write speed which is of course explained by the new DWA cache. Price is the deciding factor between the MX100 and MX200 so although the MX200 isn't priced aggressively yet, it will almost certainly move up the value rankings when retailers build stocks and subsequently cut prices. [Feb '15 SSDrivePro]


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]


Solid State Drive Rankings (Price vs Performance) March 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]


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
  • - 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

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The Best.
Intel Core i7-8700K $330Nvidia GTX 1070 $447Samsung 850 Evo 250GB $85
Intel Core i7-7700K $290Nvidia GTX 1060-6GB $335Samsung 850 Evo 500GB $150
Intel Core i5-8600K $243AMD RX 480 $400Samsung 850 Pro 256GB $120
Seagate Barracuda 1TB (2016) $44Corsair Vengeance LPX DDR4 3000 C15 2x8GB $195SanDisk Extreme 64GB $44
Seagate Barracuda 3TB (2016) $75G.SKILL Trident Z DDR4 3200 C14 4x16GB $931SanDisk Extreme 32GB $23
Seagate Barracuda 2TB (2016) $60Corsair Vengeance LPX DDR4 3200 C16 2x8GB $205SanDisk Extreme 16GB $18
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