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

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

Real World Speed
Performance profile from 3,257 user samples
2,537 User Benchmarks
Best Bench: 106% 95GB free
Worst Bench: 63% 105GB free
Poor: 63% Great: 106%
SPEED RANK: 120th / 857
720 User Benchmarks
Best Bench: 101% 98GB free
Worst Bench: 59% 44GB free
Poor: 59% Great: 101%
SPEED RANK: 178th / 857
Effective Speed
Effective SSD Speed
85.3 % +5% 81.3 % -5%
Avg. Sequential Read Speed
481 MB/s Slightly faster read speed.
450 MB/s -7%
Avg. Sequential Write Speed
416 MB/s Slightly faster write speed.
367 MB/s -13%
4K Read
Avg. 4K Random Read Speed
28.4 MB/s +3% 27.7 MB/s -3%
4K Write
Avg. 4K Random Write Speed
71.1 MB/s -12% 79.8 MB/s Slightly faster random write.
Avg. Sequential Mixed IO Speed
411 MB/s Slightly faster mixed IO speed.
366 MB/s -12%
4K Mixed
Avg. 4K Random Mixed IO Speed
22.5 MB/s Slightly faster random mixed IO.
20.6 MB/s -9%
Peak Sequential Read Speed
515 MB/s Slightly faster peak read speed.
485 MB/s -6%
Peak Sequential Write Speed
494 MB/s +5% 472 MB/s -5%
4K Read
Peak 4K Random Read Speed
36.4 MB/s +4% 35.1 MB/s -4%
4K Write
Peak 4K Random Write Speed
117 MB/s -3% 120 MB/s +3%
Peak Sequential Mixed IO Speed
484 MB/s Slightly faster peak mixed IO speed.
454 MB/s -7%
4K Mixed
Peak 4K Random Mixed IO Speed
29.8 MB/s +5% 28.5 MB/s -5%
Market Share
Based on 3,517,083 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.14 % Hugely higher market share.
0.05 % -180%
Value For Money
76.6 % +5% 73 % -5%
User Rating
UBM User Rating
64 % +2% 63 % -2%
Price (score)
$105 +0% $105 -0%
38 Months More recent.
51 Months -25%
DQ Read
Peak 4K-64Thread Read Speed
364 MB/s +2% 356 MB/s -2%
DQ Write
Peak 4K-64Thread Write Speed
323 MB/s Slightly faster peak deep queue write.
298 MB/s -8%
AS-SSD Total
AS-SSD Total Score
1,184 Pts +4% 1,142 Pts -4%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
65.5 MB/s -3% 67.3 MB/s +3%
ADQ Read
Avg. 4K-64Thread Read Speed
192 MB/s Slightly faster deep queue read.
177 MB/s -8%
ADQ Write
Avg. 4K-64Thread Write Speed
171 MB/s -15% 196 MB/s Slightly faster deep queue write.
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
47.8 MB/s Slightly faster deep queue mixed IO.
41.7 MB/s -15%
240GB 240GB

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 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]


Solid State Drive Rankings (Price vs Performance) August 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 $300Nvidia GTX 1070 $410Samsung 850 Evo 250GB $99
AMD Ryzen 7 1700 $280AMD RX 480 $390Samsung 850 Pro 256GB $133
Intel Core i5-7600K $212Nvidia GTX 1060-6GB $271Samsung 850 Evo 500GB $165
Seagate Barracuda 1TB (2016) $45G.SKILL Trident Z DDR4 3200 C14 4x16GB $718SanDisk Extreme 64GB $45
Seagate Barracuda 3TB (2016) $83Corsair Vengeance LPX DDR4 3000 C15 2x8GB $140SanDisk Extreme 32GB $22
Seagate Barracuda 7200.14 1TB $55HyperX Fury DDR4 2133 C14 2x8GB $140SanDisk Ultra Fit 32GB $13
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