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 12,956 user samples
1,028 User Benchmarks
Best Bench: 100% 93GB free
Worst Bench: 57% 65GB free
Poor: 57% Great: 100%
SPEED RANK: 213th / 908
11,928 User Benchmarks
Best Bench: 100% 95GB free
Worst Bench: 65% 142GB free
Poor: 65% Great: 100%
SPEED RANK: 157th / 908
Effective Speed
Effective SSD Speed
80.9 % 84.7 % +5%
Avg. Sequential Read Speed
452 MB/s 502 MB/s Slightly faster read speed.
Avg. Sequential Write Speed
373 MB/s +5% 356 MB/s
4K Read
Avg. 4K Random Read Speed
27.2 MB/s Slightly faster random read.
25 MB/s
4K Write
Avg. 4K Random Write Speed
76.7 MB/s 78.5 MB/s +2%
Avg. Sequential Mixed IO Speed
369 MB/s 413 MB/s Slightly faster mixed IO speed.
4K Mixed
Avg. 4K Random Mixed IO Speed
20.4 MB/s 27.6 MB/s Much faster random mixed IO.
Peak Sequential Read Speed
489 MB/s 524 MB/s Slightly faster peak read speed.
Peak Sequential Write Speed
478 MB/s Faster peak write speed.
370 MB/s
4K Read
Peak 4K Random Read Speed
35 MB/s Faster peak random read.
30.4 MB/s
4K Write
Peak 4K Random Write Speed
119 MB/s Slightly faster peak random write.
108 MB/s
Peak Sequential Mixed IO Speed
453 MB/s Slightly faster peak mixed IO speed.
431 MB/s
4K Mixed
Peak 4K Random Mixed IO Speed
28.5 MB/s 37.8 MB/s Much faster peak random mixed IO.
Market Share
Based on 6,041,555 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.03 % 0.2 % Hugely higher market share.
Value For Money
55.8 % 75.3 % Much better value.
User Rating
UBM User Rating
63 % +2% 62 %
Price (score)
$149 $111 Cheaper.
58 Months 38 Months Much more recent.
DQ Read
Peak 4K-64Thread Read Speed
351 MB/s Faster peak deep queue read.
277 MB/s
DQ Write
Peak 4K-64Thread Write Speed
299 MB/s 311 MB/s +4%
AS-SSD Total
AS-SSD Total Score
1,135 Pts Slightly stronger server IO.
1,003 Pts
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
67.4 MB/s 72.3 MB/s Slightly faster peak deep queue mixed IO.
ADQ Read
Avg. 4K-64Thread Read Speed
173 MB/s Slightly faster deep queue read.
158 MB/s
ADQ Write
Avg. 4K-64Thread Write Speed
194 MB/s 203 MB/s +5%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
42.4 MB/s 47.8 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) March 2018 SSD Rankings.

Welcome to our 2.5" and M.2 SSD comparison. We calculate effective speed for both SATA and NVMe drives based on real world performance then adjust by current prices per GB to yield a value for money rating. Our calculated values are checked against thousands of individual user ratings. The customizable table below combines these factors to bring you the definitive list of top SSDs. [SSDrivePro]


Group Test Results

  • Best user rated - Sometimes benchmarks get it completely wrong...
  • Fastest real world speed - Real World Speed measures performance for typical consumers.
  • Best value for money - Value for money is based on real world performance, price and capacity.
  • Raw speed comparison - Raw speed readings.
  • Details ordered by value - Detailed performance stats ordered by overall value for money.
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 i7-8700K $330Nvidia GTX 1070 $447Samsung 850 Evo 250GB $85
Intel Core i7-7700K $290Nvidia GTX 1060-6GB $335Samsung 850 Evo 500GB $150
Intel Core i5-8600K $243AMD RX 480 $400Samsung 850 Pro 256GB $120
Seagate Barracuda 1TB (2016) $44Corsair Vengeance LPX DDR4 3000 C15 2x8GB $190SanDisk Extreme 64GB $44
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $931SanDisk Extreme 32GB $23
Seagate Barracuda 2TB (2016) $60Corsair Vengeance LPX DDR4 3200 C16 2x8GB $205SanDisk Extreme 16GB $18
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