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

Controller: Samsung 3 Core MEX. Memory: Samsung 19nm Toggle Mode TLC.

Real World Speed
Performance profile from 50,642 user samples
2,517 User Benchmarks
Best Bench: 108% 166GB free
Worst Bench: 65% 105GB free
Poor: 65% Great: 108%
SPEED RANK: 105th / 859
48,125 User Benchmarks
Best Bench: 97% 13GB free
Worst Bench: 56% 8GB free
Poor: 56% Great: 97%
SPEED RANK: 208th / 859
Effective Speed
Effective SSD Speed
87.4 % Slightly faster effective speed.
79.3 % -10%
Avg. Sequential Read Speed
487 MB/s +0% 485 MB/s -0%
Avg. Sequential Write Speed
423 MB/s Much faster write speed.
317 MB/s -33%
4K Read
Avg. 4K Random Read Speed
28.5 MB/s -27% 36.1 MB/s Faster random read.
4K Write
Avg. 4K Random Write Speed
74.1 MB/s Faster random write.
58 MB/s -28%
Avg. Sequential Mixed IO Speed
413 MB/s Faster mixed IO speed.
326 MB/s -27%
4K Mixed
Avg. 4K Random Mixed IO Speed
22.6 MB/s Slightly faster random mixed IO.
20.7 MB/s -9%
Peak Sequential Read Speed
516 MB/s +1% 510 MB/s -1%
Peak Sequential Write Speed
494 MB/s Much faster peak write speed.
352 MB/s -40%
4K Read
Peak 4K Random Read Speed
36.2 MB/s -26% 45.7 MB/s Faster peak random read.
4K Write
Peak 4K Random Write Speed
115 MB/s Much faster peak random write.
85.6 MB/s -34%
Peak Sequential Mixed IO Speed
486 MB/s Much faster peak mixed IO speed.
357 MB/s -36%
4K Mixed
Peak 4K Random Mixed IO Speed
29.8 MB/s Slightly faster peak random mixed IO.
27.3 MB/s -9%
Market Share
Based on 3,862,640 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.15 % -1,300% 2.1 % Insanely higher market share.
Value For Money
78.5 % Better value.
66.4 % -18%
User Rating
UBM User Rating
64 % -3% 66 % +3%
Price (score)
$105 Slightly cheaper.
$120 -12%
39 Months More recent.
50 Months -22%
DQ Read
Peak 4K-64Thread Read Speed
368 MB/s +1% 364 MB/s -1%
DQ Write
Peak 4K-64Thread Write Speed
326 MB/s Much faster peak deep queue write.
240 MB/s -36%
AS-SSD Total
AS-SSD Total Score
1,191 Pts Slightly stronger server IO.
1,067 Pts -12%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
65.7 MB/s -28% 84 MB/s Faster peak deep queue mixed IO.
ADQ Read
Avg. 4K-64Thread Read Speed
212 MB/s Slightly faster deep queue read.
194 MB/s -9%
ADQ Write
Avg. 4K-64Thread Write Speed
194 MB/s Faster deep queue write.
150 MB/s -29%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
47.6 MB/s -4% 49.3 MB/s +4%
240GB 250GB

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 Evo is remarkable in that, like the Sandisk Extreme II, it features a second level cache. For the 250 GB Evo this consists of a 3 GB Turbowrite cache (TWC) which is a block of high speed Flash Memory. When the TWC is exhausted write speeds drop by approximately 50% but that won't often happen under typical consumer workloads. In terms of raw performance, even with its cache, the Evo still isn't the fastest drive. With a real world speed index reading of 439 MB/s the EVO is however, within reach of the two speed leaders (Vector and 850 Pro). At a price point of $130 the Evo is around 30% cheaper making it the best value for money SSDs I have seen in 2014. Comparing the Evo and the Sandisk Ultra Plus shows that the Evo is the winner but the Sandisk may be a viable alternative thanks to its cache-free, and therefore more consistent performance during extended writes. [Aug '14 SSDrivePro]


Solid State Drive Rankings (Price vs Performance) September 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 $295Nvidia GTX 1070 $410Samsung 850 Evo 250GB $97
AMD Ryzen 7 1700 $270AMD RX 480 $350Samsung 850 Pro 256GB $120
Intel Core i5-7600K $210Nvidia GTX 1060-6GB $263Samsung 850 Evo 500GB $150
Seagate Barracuda 1TB (2016) $45G.SKILL Trident Z DDR4 3200 C14 4x16GB $724SanDisk Extreme 64GB $33
Seagate Barracuda 3TB (2016) $77Corsair Vengeance LPX DDR4 3000 C15 2x8GB $155SanDisk Extreme 32GB $22
Seagate Barracuda 7200.14 1TB $56HyperX Fury DDR4 2133 C14 2x8GB $141SanDisk Extreme 16GB $20
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