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 15,158 user samples
992 User Benchmarks
Best Bench: 100% 93GB free
Worst Bench: 59% 65GB free
Poor: 59% Great: 100%
SPEED RANK: 183rd / 873
14,166 User Benchmarks
Best Bench: 96% 40GB free
Worst Bench: 61% 211GB free
Poor: 61% Great: 96%
SPEED RANK: 191st / 873
Effective Speed
Effective SSD Speed
81.5 % +0% 81.2 % -0%
Avg. Sequential Read Speed
453 MB/s -10% 497 MB/s Slightly faster read speed.
Avg. Sequential Write Speed
369 MB/s Slightly faster write speed.
321 MB/s -15%
4K Read
Avg. 4K Random Read Speed
27.7 MB/s Slightly faster random read.
25.8 MB/s -7%
4K Write
Avg. 4K Random Write Speed
78.7 MB/s -7% 84.4 MB/s Slightly faster random write.
Avg. Sequential Mixed IO Speed
367 MB/s -2% 373 MB/s +2%
4K Mixed
Avg. 4K Random Mixed IO Speed
20.7 MB/s -18% 24.4 MB/s Faster random mixed IO.
Peak Sequential Read Speed
490 MB/s -7% 522 MB/s Slightly faster peak read speed.
Peak Sequential Write Speed
476 MB/s Much faster peak write speed.
332 MB/s -43%
4K Read
Peak 4K Random Read Speed
35.1 MB/s Slightly faster peak random read.
30.9 MB/s -14%
4K Write
Peak 4K Random Write Speed
120 MB/s +2% 118 MB/s -2%
Peak Sequential Mixed IO Speed
453 MB/s Slightly faster peak mixed IO speed.
396 MB/s -14%
4K Mixed
Peak 4K Random Mixed IO Speed
28.5 MB/s -18% 33.7 MB/s Faster peak random mixed IO.
Market Share
Based on 5,230,364 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.06 % -717% 0.49 % Hugely higher market share.
Value For Money
73.1 % +3% 71 % -3%
User Rating
UBM User Rating
63 % -2% 64 % +2%
Price (score)
$105 Slightly cheaper.
$116 -9%
56 Months -23% 43 Months More recent.
DQ Read
Peak 4K-64Thread Read Speed
354 MB/s Much faster peak deep queue read.
219 MB/s -62%
DQ Write
Peak 4K-64Thread Write Speed
298 MB/s -2% 305 MB/s +2%
AS-SSD Total
AS-SSD Total Score
1,140 Pts Stronger server IO.
915 Pts -25%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
67.2 MB/s Faster peak deep queue mixed IO.
53.6 MB/s -25%
ADQ Read
Avg. 4K-64Thread Read Speed
178 MB/s Much faster deep queue read.
122 MB/s -46%
ADQ Write
Avg. 4K-64Thread Write Speed
196 MB/s -5% 206 MB/s Slightly faster deep queue write.
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
42.2 MB/s Faster deep queue mixed IO.
36.1 MB/s -17%
240GB 256GB

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 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) January 2018 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 $280Nvidia GTX 1070 $430Samsung 850 Evo 250GB $90
AMD Ryzen 7 1700 $290Nvidia GTX 1060-6GB $275Samsung 850 Evo 500GB $140
Intel Core i5-7600K $210AMD RX 480 $400Samsung 850 Pro 256GB $110
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $205SanDisk Extreme 64GB $65
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $931SanDisk Extreme 32GB $22
Seagate Barracuda 7200.14 1TB $51Corsair Vengeance LPX DDR4 3200 C16 2x8GB $220SanDisk Ultra Fit 32GB $12
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