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 4,962 user samples
860 User Benchmarks
Best Bench: 90% 17GB free
Worst Bench: 56% 43GB free
Poor: 56% Great: 90%
SPEED RANK: 315th / 908
4,102 User Benchmarks
Best Bench: 106% 197GB free
Worst Bench: 57% 20GB free
Poor: 57% Great: 106%
SPEED RANK: 173rd / 908
Effective Speed
Effective SSD Speed
72.8 % 83.2 % Slightly faster effective speed.
Avg. Sequential Read Speed
445 MB/s 472 MB/s Slightly faster read speed.
Avg. Sequential Write Speed
261 MB/s 413 MB/s Much faster write speed.
4K Read
Avg. 4K Random Read Speed
27 MB/s 27.3 MB/s +1%
4K Write
Avg. 4K Random Write Speed
74.4 MB/s Slightly faster random write.
69.9 MB/s
Avg. Sequential Mixed IO Speed
298 MB/s 411 MB/s Much faster mixed IO speed.
4K Mixed
Avg. 4K Random Mixed IO Speed
19.5 MB/s 21.2 MB/s Slightly faster random mixed IO.
Peak Sequential Read Speed
484 MB/s 515 MB/s Slightly faster peak read speed.
Peak Sequential Write Speed
317 MB/s 495 MB/s Much faster peak write speed.
4K Read
Peak 4K Random Read Speed
34.6 MB/s 35.3 MB/s +2%
4K Write
Peak 4K Random Write Speed
116 MB/s +5% 111 MB/s
Peak Sequential Mixed IO Speed
358 MB/s 483 MB/s Much faster peak mixed IO speed.
4K Mixed
Peak 4K Random Mixed IO Speed
25.9 MB/s 29.5 MB/s Slightly faster peak random mixed IO.
Market Share
Based on 6,041,768 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.01 % 0.1 % Hugely higher market share.
Value For Money
33.1 % 74.7 % Hugely better value.
User Rating
UBM User Rating
54 % 64 % More popular.
Price (score)
$130 $105 Cheaper.
58 Months 45 Months More recent.
DQ Read
Peak 4K-64Thread Read Speed
342 MB/s 358 MB/s +5%
DQ Write
Peak 4K-64Thread Write Speed
281 MB/s 316 MB/s Slightly faster peak deep queue write.
AS-SSD Total
AS-SSD Total Score
1,075 Pts 1,160 Pts Slightly stronger server IO.
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
61.9 MB/s 65.3 MB/s Slightly faster peak deep queue mixed IO.
ADQ Read
Avg. 4K-64Thread Read Speed
184 MB/s Slightly faster deep queue read.
167 MB/s
ADQ Write
Avg. 4K-64Thread Write Speed
177 MB/s 181 MB/s +2%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
40.4 MB/s 42.6 MB/s Slightly faster deep queue mixed IO.
120GB 240GB

The 120GB Sandisk Extreme II proved to be a disappointment. I was expecting the same blistering performance as I saw on its larger 240GB sibling but that proved not to be the case. Comparing the 120GB and 240GB Extreme II's reveals that the larger 240GB version has peak speed ratings that are approximately 35% faster that the 120GB Extreme II. The main weakness of the 120GB Extreme II is its sequential write speed which is just 305 MB/s vs 492 MB/s on the 240GB version. Reduced write ability at lower capacities is explained by fewer NAND modules which reduce a controllers ability to parallelize slow write operations across different memory banks. Overall the Sandisk Extreme II sits amongst the bottom 20% of performers in the 120-128GB capacity category. Several of the drives in the group test have comparable performance at both the 120 and 240 GB capacities, those drives are the ones to go for. [Feb '14 SSDrivePro]


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]


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

 Best User Rated

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 $212SanDisk Extreme 16GB $18
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