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

Controller: Marvell 88SS9187. Memory: SanDisk 19nm TLC.

Real World Speed
Performance profile from 63,631 user samples
51,200 User Benchmarks
Best Bench: 97% 157GB free
Worst Bench: 54% 4GB free
Poor: 54% Great: 97%
SPEED RANK: 224th / 873
12,431 User Benchmarks
Best Bench: 84% 152GB free
Worst Bench: 46% 134GB free
Poor: 46% Great: 84%
SPEED RANK: 425th / 873
Effective Speed
Effective SSD Speed
78.7 % Faster effective speed.
65.6 % -20%
Avg. Sequential Read Speed
484 MB/s Slightly faster read speed.
454 MB/s -7%
Avg. Sequential Write Speed
316 MB/s Faster write speed.
249 MB/s -27%
4K Read
Avg. 4K Random Read Speed
35.8 MB/s Much faster random read.
27.1 MB/s -32%
4K Write
Avg. 4K Random Write Speed
56.9 MB/s Slightly faster random write.
50.4 MB/s -13%
Avg. Sequential Mixed IO Speed
321 MB/s Much faster mixed IO speed.
241 MB/s -33%
4K Mixed
Avg. 4K Random Mixed IO Speed
20.5 MB/s Much faster random mixed IO.
14.6 MB/s -40%
Peak Sequential Read Speed
510 MB/s +2% 498 MB/s -2%
Peak Sequential Write Speed
351 MB/s +4% 339 MB/s -4%
4K Read
Peak 4K Random Read Speed
45.8 MB/s Faster peak random read.
37.5 MB/s -22%
4K Write
Peak 4K Random Write Speed
85.4 MB/s +4% 81.8 MB/s -4%
Peak Sequential Mixed IO Speed
357 MB/s Slightly faster peak mixed IO speed.
326 MB/s -10%
4K Mixed
Peak 4K Random Mixed IO Speed
27.5 MB/s Faster peak random mixed IO.
21.3 MB/s -29%
Market Share
Based on 4,776,024 SSDs tested.
Market Share
Market Share (trailing 30 days)
1.58 % Hugely higher market share.
0.46 % -243%
Value For Money
53.7 % -41% 75.8 % Much better value.
User Rating
UBM User Rating
68 % Slightly more popular.
63 % -8%
Price (score)
$158 -52% $75 Much cheaper.
53 Months -26% 39 Months More recent.
DQ Read
Peak 4K-64Thread Read Speed
365 MB/s +1% 362 MB/s -1%
DQ Write
Peak 4K-64Thread Write Speed
239 MB/s Slightly faster peak deep queue write.
208 MB/s -15%
AS-SSD Total
AS-SSD Total Score
1,067 Pts Slightly stronger server IO.
1,008 Pts -6%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
84.4 MB/s Much faster peak deep queue mixed IO.
51.5 MB/s -64%
ADQ Read
Avg. 4K-64Thread Read Speed
191 MB/s +4% 184 MB/s -4%
ADQ Write
Avg. 4K-64Thread Write Speed
147 MB/s Slightly faster deep queue write.
132 MB/s -11%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
47.2 MB/s Much faster deep queue mixed IO.
30.9 MB/s -53%
250GB 240GB

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]


The Sandisk Ultra II sits above Sandisk's Ultra Plus and below their Extreme Pro. The Ultra Plus would probably have been phased out completely were it not for its continued success within budget space. The Ultra II is the first Sandisk drive to utilize cheaper (and slower) TLC NAND. Similarly to the Extreme Pro, the Ultra II utilizes an nCache which operates a portion of the NAND in simulated SLC mode. This strategy also matches the one employed by Samsung's now 14 months old Evo. Comparing the Ultra II and Evo shows broad performance equivalence which given the Ultra II's 15% price discount makes it the better choice today. That said it's probably worth waiting for the release of the 850 Evo which will pack another 14 months of Samsung's market leading R&D and will probably steal the show. [Sep '14 SSDrivePro]


Solid State Drive Rankings (Price vs Performance) December 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 $280Nvidia GTX 1070 $410Samsung 850 Evo 250GB $85
AMD Ryzen 7 1700 $245AMD RX 480 $265Samsung 850 Pro 256GB $110
Intel Core i5-7600K $210Nvidia GTX 1060-6GB $260Samsung 850 Evo 500GB $140
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $205SanDisk Extreme 64GB $43
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $1,050SanDisk Extreme 32GB $22
Seagate Barracuda 2TB (2016) $60Corsair Vengeance LPX DDR4 3200 C16 2x8GB $215SanDisk Ultra Fit 32GB $10
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