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 55,368 user samples
3,630 User Benchmarks
Best Bench: 105% 101GB free
Worst Bench: 66% 160GB free
Poor: 66% Great: 105%
SPEED RANK: 111th / 862
51,738 User Benchmarks
Best Bench: 97% 140GB free
Worst Bench: 55% 24GB free
Poor: 55% Great: 97%
SPEED RANK: 214th / 862
Effective Speed
Effective SSD Speed
87.1 % Slightly faster effective speed.
78.9 % -10%
Avg. Sequential Read Speed
494 MB/s +2% 485 MB/s -2%
Avg. Sequential Write Speed
422 MB/s Much faster write speed.
315 MB/s -34%
4K Read
Avg. 4K Random Read Speed
29.7 MB/s -22% 36.2 MB/s Faster random read.
4K Write
Avg. 4K Random Write Speed
79.8 MB/s Much faster random write.
57.9 MB/s -38%
Avg. Sequential Mixed IO Speed
421 MB/s Faster mixed IO speed.
324 MB/s -30%
4K Mixed
Avg. 4K Random Mixed IO Speed
21.1 MB/s +3% 20.4 MB/s -3%
Peak Sequential Read Speed
516 MB/s +1% 511 MB/s -1%
Peak Sequential Write Speed
493 MB/s Much faster peak write speed.
352 MB/s -40%
4K Read
Peak 4K Random Read Speed
35.9 MB/s -27% 45.5 MB/s Faster peak random read.
4K Write
Peak 4K Random Write Speed
117 MB/s Much faster peak random write.
83.6 MB/s -40%
Peak Sequential Mixed IO Speed
485 MB/s Much faster peak mixed IO speed.
358 MB/s -35%
4K Mixed
Peak 4K Random Mixed IO Speed
29.1 MB/s Slightly faster peak random mixed IO.
27.3 MB/s -7%
Market Share
Based on 4,465,714 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.1 % -1,540% 1.64 % Insanely higher market share.
Value For Money
78.2 % Much better value.
53.8 % -45%
User Rating
UBM User Rating
64 % -5% 67 % +5%
Price (score)
$105 Much cheaper.
$158 -33%
41 Months More recent.
52 Months -21%
DQ Read
Peak 4K-64Thread Read Speed
360 MB/s -2% 366 MB/s +2%
DQ Write
Peak 4K-64Thread Write Speed
323 MB/s Much faster peak deep queue write.
239 MB/s -35%
AS-SSD Total
AS-SSD Total Score
1,177 Pts Slightly stronger server IO.
1,066 Pts -10%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
65.3 MB/s -30% 84.6 MB/s Faster peak deep queue mixed IO.
ADQ Read
Avg. 4K-64Thread Read Speed
171 MB/s -12% 191 MB/s Slightly faster deep queue read.
ADQ Write
Avg. 4K-64Thread Write Speed
187 MB/s Faster deep queue write.
148 MB/s -26%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
38.7 MB/s -28% 49.4 MB/s Faster deep queue mixed IO.
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) November 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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Intel Core i7-7700K $288Nvidia GTX 1070 $410Samsung 850 Evo 250GB $85
AMD Ryzen 7 1700 $270AMD RX 480 $240Samsung 850 Pro 256GB $110
Intel Core i5-7600K $200Nvidia GTX 1060-6GB $240Samsung 850 Evo 500GB $150
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $160SanDisk Extreme 64GB $33
Seagate Barracuda 3TB (2016) $75G.SKILL Trident Z DDR4 3200 C14 4x16GB $1,050SanDisk Extreme 32GB $22
Seagate Barracuda 7200.14 1TB $54Corsair Vengeance LPX DDR4 3200 C16 2x8GB $170SanDisk Ultra Fit 32GB $12
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