Controller: Marvell 88SS9187-BLD2. Flash Memory: SanDisk 19nm eX2 ABL MLC.

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

Real World Speed
Performance profile from 7,008 user samples
2,409 User Benchmarks
Best Bench: 106% 95GB free
Worst Bench: 62% 105GB free
Poor: 62% Great: 106%
SPEED RANK: 115th / 853
4,599 User Benchmarks
Best Bench: 101% 108GB free
Worst Bench: 63% 60GB free
Poor: 63% Great: 101%
SPEED RANK: 141st / 853
Effective Speed
Effective SSD Speed
85.4 % +2% 83.5 % -2%
Avg. Sequential Read Speed
478 MB/s -6% 505 MB/s Slightly faster read speed.
Avg. Sequential Write Speed
414 MB/s Slightly faster write speed.
369 MB/s -12%
4K Read
Avg. 4K Random Read Speed
28.3 MB/s +4% 27.2 MB/s -4%
4K Write
Avg. 4K Random Write Speed
73.1 MB/s +1% 72.4 MB/s -1%
Avg. Sequential Mixed IO Speed
417 MB/s Slightly faster mixed IO speed.
376 MB/s -11%
4K Mixed
Avg. 4K Random Mixed IO Speed
22.4 MB/s -8% 24.2 MB/s Slightly faster random mixed IO.
Peak Sequential Read Speed
515 MB/s -2% 527 MB/s +2%
Peak Sequential Write Speed
493 MB/s Faster peak write speed.
399 MB/s -24%
4K Read
Peak 4K Random Read Speed
36.3 MB/s Slightly faster peak random read.
32.9 MB/s -10%
4K Write
Peak 4K Random Write Speed
118 MB/s Slightly faster peak random write.
104 MB/s -13%
Peak Sequential Mixed IO Speed
484 MB/s Faster peak mixed IO speed.
415 MB/s -17%
4K Mixed
Peak 4K Random Mixed IO Speed
30.1 MB/s -14% 34.3 MB/s Slightly faster peak random mixed IO.
Market Share
Based on 3,271,260 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.17 % -76% 0.3 % Much higher market share.
Value For Money
76.7 % Much better value.
57.4 % -34%
User Rating
UBM User Rating
65 % -3% 67 % +3%
Price (score)
$105 Much cheaper.
$156 -33%
37 Months -19% 30 Months More recent.
DQ Read
Peak 4K-64Thread Read Speed
365 MB/s +3% 354 MB/s -3%
DQ Write
Peak 4K-64Thread Write Speed
322 MB/s Faster peak deep queue write.
278 MB/s -16%
AS-SSD Total
AS-SSD Total Score
1,186 Pts Slightly stronger server IO.
1,091 Pts -9%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
65 MB/s -3% 66.8 MB/s +3%
ADQ Read
Avg. 4K-64Thread Read Speed
193 MB/s Slightly faster deep queue read.
170 MB/s -14%
ADQ Write
Avg. 4K-64Thread Write Speed
178 MB/s +3% 173 MB/s -3%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
47.1 MB/s Slightly faster deep queue mixed IO.
41.4 MB/s -14%
240GB 250GB

The 240GB Sandisk Extreme Pro uses the same controller and NAND as its 13 months younger predecessor, the Extreme II. Comparing the Extreme II and Extreme Pro shows that average performance has increased by 10% but peak performance remains broadly unchanged. The Pro features an improved nCache which uses an SLC buffer to cache writes prior to writing them to the slower MLC NAND. In order to benefit from this improved caching, huge amounts of data need to be written for extended periods, an unlikely consumer scenario. Comparing core performance between the Samsung 840 Evo and Extreme Pro shows that the Extreme Pro averages around 12% faster than the Evo. The Extreme Pro also has a 10 year warranty but I wonder if SATA 3 will even be around at that time. Although the Extreme Pro has a superb performance profile it's not a game changer. [Jun '14 SSDrivePro]


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]


Solid State Drive Rankings (Price vs Performance) July 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

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The Best.
Intel Core i7-7700K $295Nvidia GTX 1070 $390Samsung 850 Evo 250GB $97
AMD Ryzen 7 1700 $268AMD RX 480 $260Samsung 850 Pro 256GB $136
Intel Core i5-7600K $224Nvidia GTX 1060-6GB $239Samsung 850 Evo 500GB $165
Seagate Barracuda 1TB (2016) $50G.SKILL Trident Z DDR4 3200 C14 4x16GB $714SanDisk Extreme 64GB $34
Seagate Barracuda 3TB (2016) $83Corsair Vengeance LPX DDR4 3000 C15 2x8GB $132SanDisk Extreme 32GB $23
Seagate Barracuda 7200.14 1TB $44HyperX Fury DDR4 2133 C14 2x8GB $133SanDisk Ultra Fit 32GB $13
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