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 37,556 user samples
2,309 User Benchmarks
Best Bench: 107% 82GB free
Worst Bench: 65% 69GB free
Poor: 65% Great: 107%
SPEED RANK: 110th / 850
35,247 User Benchmarks
Best Bench: 97% 151GB free
Worst Bench: 58% 150GB free
Poor: 58% Great: 97%
SPEED RANK: 177th / 850
Effective Speed
Effective SSD Speed
86.1 % Slightly faster effective speed.
81.1 % -6%
Avg. Sequential Read Speed
480 MB/s -1% 487 MB/s +1%
Avg. Sequential Write Speed
418 MB/s Much faster write speed.
321 MB/s -30%
4K Read
Avg. 4K Random Read Speed
28 MB/s -34% 37.5 MB/s Much faster random read.
4K Write
Avg. 4K Random Write Speed
72.3 MB/s Faster random write.
60.6 MB/s -19%
Avg. Sequential Mixed IO Speed
418 MB/s Faster mixed IO speed.
331 MB/s -26%
4K Mixed
Avg. 4K Random Mixed IO Speed
22.6 MB/s Slightly faster random mixed IO.
21.3 MB/s -6%
Peak Sequential Read Speed
515 MB/s +1% 511 MB/s -1%
Peak Sequential Write Speed
485 MB/s Much faster peak write speed.
352 MB/s -38%
4K Read
Peak 4K Random Read Speed
36 MB/s -28% 46.2 MB/s Faster peak random read.
4K Write
Peak 4K Random Write Speed
118 MB/s Much faster peak random write.
84.4 MB/s -40%
Peak Sequential Mixed IO Speed
484 MB/s Much faster peak mixed IO speed.
358 MB/s -35%
4K Mixed
Peak 4K Random Mixed IO Speed
29.7 MB/s Slightly faster peak random mixed IO.
27.8 MB/s -7%
Market Share
Based on 2,859,716 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.18 % -1,244% 2.42 % Insanely higher market share.
Value For Money
77.3 % Much better value.
58 % -33%
User Rating
UBM User Rating
65 % 0% 65 % 0%
Price (score)
$105 Cheaper.
$148 -29%
35 Months More recent.
46 Months -24%
DQ Read
Peak 4K-64Thread Read Speed
364 MB/s -1% 368 MB/s +1%
DQ Write
Peak 4K-64Thread Write Speed
320 MB/s Much faster peak deep queue write.
241 MB/s -33%
AS-SSD Total
AS-SSD Total Score
1,180 Pts Slightly stronger server IO.
1,074 Pts -10%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
65.1 MB/s -29% 84.3 MB/s Faster peak deep queue mixed IO.
ADQ Read
Avg. 4K-64Thread Read Speed
202 MB/s +5% 193 MB/s -5%
ADQ Write
Avg. 4K-64Thread Write Speed
190 MB/s Faster deep queue write.
161 MB/s -18%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
49.7 MB/s -1% 50.1 MB/s +1%
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) May 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.

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Intel Core i7-7700K $309Nvidia GTX 1070 $368Samsung 850 Evo 250GB $99
Intel Core i5-7600K $229AMD RX 480 $227Samsung 850 Pro 256GB $132
AMD Ryzen 7 1700 $300Nvidia GTX 1060-6GB $230Samsung 850 Evo 500GB $160
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $127SanDisk Extreme 64GB $33
Seagate Barracuda 3TB (2016) $85G.SKILL Trident Z DDR4 3200 C14 4x16GB $700SanDisk Extreme 32GB $22
Seagate Barracuda 7200.14 1TB $46Corsair Vengeance LPX DDR4 3200 C16 2x8GB $136SanDisk Ultra Fit 32GB $12
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