Controller: Samsung Dual Core MGX. Memory: Samsung 40nm TLC V-NAND

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

Real World Speed
Performance profile from 215,353 user samples
214,431 User Benchmarks
Best Bench: 115% 113GB free
Worst Bench: 64% 181GB free
Poor: 64% Great: 115%
SPEED RANK: 74th / 873
922 User Benchmarks
Best Bench: 101% 93GB free
Worst Bench: 60% 65GB free
Poor: 60% Great: 101%
SPEED RANK: 183rd / 873
Effective Speed
Effective SSD Speed
92.9 % Slightly faster effective speed.
81.5 % -14%
Avg. Sequential Read Speed
495 MB/s Slightly faster read speed.
452 MB/s -10%
Avg. Sequential Write Speed
390 MB/s Slightly faster write speed.
368 MB/s -6%
4K Read
Avg. 4K Random Read Speed
37 MB/s Much faster random read.
27.8 MB/s -33%
4K Write
Avg. 4K Random Write Speed
76.4 MB/s -4% 79.3 MB/s +4%
Avg. Sequential Mixed IO Speed
396 MB/s Slightly faster mixed IO speed.
366 MB/s -8%
4K Mixed
Avg. 4K Random Mixed IO Speed
32 MB/s Much faster random mixed IO.
20.8 MB/s -54%
Peak Sequential Read Speed
517 MB/s Slightly faster peak read speed.
489 MB/s -6%
Peak Sequential Write Speed
417 MB/s -14% 475 MB/s Slightly faster peak write speed.
4K Read
Peak 4K Random Read Speed
46.9 MB/s Much faster peak random read.
35 MB/s -34%
4K Write
Peak 4K Random Write Speed
108 MB/s -10% 119 MB/s Slightly faster peak random write.
Peak Sequential Mixed IO Speed
422 MB/s -7% 453 MB/s Slightly faster peak mixed IO speed.
4K Mixed
Peak 4K Random Mixed IO Speed
47.3 MB/s Much faster peak random mixed IO.
28.5 MB/s -66%
Market Share
Based on 4,734,658 SSDs tested.
Market Share
Market Share (trailing 30 days)
8.76 % Insanely higher market share.
0.02 % -43,700%
Value For Money
98.2 % Much better value.
73.2 % -34%
User Rating
UBM User Rating
126 % Hugely more popular.
63 % -100%
Price (score)
$88 Cheaper.
$105 -16%
36 Months Much more recent.
55 Months -35%
DQ Read
Peak 4K-64Thread Read Speed
371 MB/s +4% 356 MB/s -4%
DQ Write
Peak 4K-64Thread Write Speed
283 MB/s -6% 299 MB/s Slightly faster peak deep queue write.
AS-SSD Total
AS-SSD Total Score
1,156 Pts +1% 1,142 Pts -1%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
121 MB/s Much faster peak deep queue mixed IO.
67.3 MB/s -80%
ADQ Read
Avg. 4K-64Thread Read Speed
178 MB/s +1% 177 MB/s -1%
ADQ Write
Avg. 4K-64Thread Write Speed
175 MB/s -12% 196 MB/s Slightly faster deep queue write.
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
64.5 MB/s Much faster deep queue mixed IO.
42.1 MB/s -53%
250GB 240GB

The 250GB Samsung 850 Evo has a similar architecture to its hugely successful predecessor, the 840 Evo. Both drives are TLC based but the 850 uses 3D V-NAND as opposed to regular NAND. Both drives also feature a Turbowrite cache (TWC) which buffers up to 3GB of writes. The TWC enables high burst write speeds but when the cache exhausts write speeds drop to 300 MB/s. Comparing the 850 and 840 Evos shows that effective speed, has improved by 11% and the warranty has been extended from three to five years but prices are also up by 11%. The 850 Evo does put in superb benchmarks (second only to the 850 Pro) but these are only valid within the TWC. At current price levels the 850 Evo struggles to compete with the value leaders[Dec '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) December 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 $280Nvidia GTX 1070 $430Samsung 850 Evo 250GB $88
AMD Ryzen 7 1700 $285AMD RX 480 $265Samsung 850 Pro 256GB $113
Intel Core i5-7600K $215Nvidia GTX 1060-6GB $260Samsung 850 Evo 500GB $140
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $205SanDisk Extreme 64GB $41
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $1,050SanDisk Extreme 32GB $22
Seagate Barracuda 2TB (2016) $60Corsair Vengeance LPX DDR4 3200 C16 2x8GB $215SanDisk Ultra Fit 32GB $10
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