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

Controller: Silicon Motion SM2246EN. Flash Memory: Micron 16nm MLC.

Real World Speed
Performance profile from 8,272 user samples
648 User Benchmarks
Best Bench: 101% 98GB free
Worst Bench: 60% 44GB free
Poor: 60% Great: 101%
SPEED RANK: 168th / 853
7,624 User Benchmarks
Best Bench: 102% 65GB free
Worst Bench: 64% 129GB free
Poor: 64% Great: 102%
SPEED RANK: 120th / 853
Effective Speed
Effective SSD Speed
81.9 % -4% 85.2 % +4%
Avg. Sequential Read Speed
450 MB/s -11% 500 MB/s Slightly faster read speed.
Avg. Sequential Write Speed
367 MB/s +3% 357 MB/s -3%
4K Read
Avg. 4K Random Read Speed
28 MB/s Slightly faster random read.
25.5 MB/s -10%
4K Write
Avg. 4K Random Write Speed
81.4 MB/s +1% 80.4 MB/s -1%
Avg. Sequential Mixed IO Speed
367 MB/s -13% 413 MB/s Slightly faster mixed IO speed.
4K Mixed
Avg. 4K Random Mixed IO Speed
20.9 MB/s -33% 27.7 MB/s Much faster random mixed IO.
Peak Sequential Read Speed
485 MB/s -8% 525 MB/s Slightly faster peak read speed.
Peak Sequential Write Speed
472 MB/s Faster peak write speed.
370 MB/s -28%
4K Read
Peak 4K Random Read Speed
35.5 MB/s Faster peak random read.
30.7 MB/s -16%
4K Write
Peak 4K Random Write Speed
121 MB/s Slightly faster peak random write.
114 MB/s -6%
Peak Sequential Mixed IO Speed
455 MB/s Slightly faster peak mixed IO speed.
432 MB/s -5%
4K Mixed
Peak 4K Random Mixed IO Speed
28.5 MB/s -34% 38.1 MB/s Much faster peak random mixed IO.
Market Share
Based on 3,284,678 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.04 % -950% 0.42 % Hugely higher market share.
Value For Money
73.5 % Slightly better value.
69.6 % -6%
User Rating
UBM User Rating
63 % 0% 63 % 0%
Price (score)
$105 Cheaper.
$124 -15%
50 Months -40% 30 Months Much more recent.
DQ Read
Peak 4K-64Thread Read Speed
357 MB/s Faster peak deep queue read.
277 MB/s -29%
DQ Write
Peak 4K-64Thread Write Speed
299 MB/s -5% 313 MB/s +5%
AS-SSD Total
AS-SSD Total Score
1,146 Pts Slightly stronger server IO.
1,012 Pts -13%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
67.3 MB/s -8% 72.5 MB/s Slightly faster peak deep queue mixed IO.
ADQ Read
Avg. 4K-64Thread Read Speed
181 MB/s Faster deep queue read.
154 MB/s -18%
ADQ Write
Avg. 4K-64Thread Write Speed
196 MB/s -6% 207 MB/s Slightly faster deep queue write.
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
42.3 MB/s -12% 47.2 MB/s Slightly faster deep queue mixed IO.
240GB 250GB

The Sandisk Extreme II uses the 88SS9187-BLD2 controller, Marvel's latest, and Sandisk's own 19MM MLC Memory. On paper this makes an extremely good combination and the benchmarks agree. The Extreme II scored an impressive 1143 in the server orientated AS SSD Benchmark putting it amongst the more capable server drives. In terms of real world consumer performance the Extreme II also fared well achieving a real world speed index score of 570.5 MB/s, amongst the top three scores we have seen to date. The Extreme II has everything going for it apart from its price which is currently significantly above average and hurting its value rating. Because the Extreme is the newest SSD we have in our group test we expect prices will drop with time. Until then, however, there is better value to be had elsewhere. [Jun '13 SSDrivePro]


The 250GB Crucial BX100 SSD is the value orientated variant of Crucial's M range of SSDs. The BX100 uses the same NAND as its premium MX200 sibling but the BX100 uses a Silicon Motion controller as opposed to the Marvel controller found in the MX range. Feature wise the BX100 is missing SLC caching and there is no hardware encryption (so security frameworks such as windows Bitlocker will operate less efficiently). In terms of I/O performance the BX100 looks promising. Comparing the BX100 and MX100 shows that the newer BX100 may be faster than its predecessor but as yet there are insufficient user benchmarks to draw any definitive conclusions. The BX100 has only just started hitting the shelves so there's plenty of room for price reductions from its already reasonable price tag. I will revisit this review when I have more performance data for the BX100. [Jan '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 $238Nvidia GTX 1060-6GB $239Samsung 850 Evo 500GB $159
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 $143SanDisk Ultra Fit 32GB $13
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