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

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

Real World Speed
Performance profile from 59,997 user samples
48,375 User Benchmarks
Best Bench: 97% 3GB free
Worst Bench: 55% 122GB free
Poor: 55% Great: 97%
SPEED RANK: 200th / 860
11,622 User Benchmarks
Best Bench: 83% 221GB free
Worst Bench: 48% 203GB free
Poor: 48% Great: 83%
SPEED RANK: 413th / 860
Effective Speed
Effective SSD Speed
79.8 % Faster effective speed.
65.6 % -22%
Avg. Sequential Read Speed
484 MB/s Slightly faster read speed.
456 MB/s -6%
Avg. Sequential Write Speed
315 MB/s Faster write speed.
246 MB/s -28%
4K Read
Avg. 4K Random Read Speed
36.6 MB/s Much faster random read.
27.7 MB/s -32%
4K Write
Avg. 4K Random Write Speed
59.4 MB/s Faster random write.
50.7 MB/s -17%
Avg. Sequential Mixed IO Speed
324 MB/s Much faster mixed IO speed.
239 MB/s -36%
4K Mixed
Avg. 4K Random Mixed IO Speed
20.8 MB/s Much faster random mixed IO.
14.8 MB/s -41%
Peak Sequential Read Speed
510 MB/s +2% 499 MB/s -2%
Peak Sequential Write Speed
353 MB/s +4% 341 MB/s -4%
4K Read
Peak 4K Random Read Speed
45.7 MB/s Faster peak random read.
37.3 MB/s -23%
4K Write
Peak 4K Random Write Speed
84.1 MB/s +3% 81.4 MB/s -3%
Peak Sequential Mixed IO Speed
358 MB/s Slightly faster peak mixed IO speed.
324 MB/s -10%
4K Mixed
Peak 4K Random Mixed IO Speed
27.5 MB/s Much faster peak random mixed IO.
21 MB/s -31%
Market Share
Based on 4,120,634 SSDs tested.
Market Share
Market Share (trailing 30 days)
2.02 % Hugely higher market share.
0.39 % -418%
Value For Money
56.5 % -19% 67 % Better value.
User Rating
UBM User Rating
66 % +5% 63 % -5%
Price (score)
$150 -41% $88 Much cheaper.
51 Months -27% 37 Months More recent.
DQ Read
Peak 4K-64Thread Read Speed
369 MB/s +1% 364 MB/s -1%
DQ Write
Peak 4K-64Thread Write Speed
241 MB/s Faster peak deep queue write.
205 MB/s -18%
AS-SSD Total
AS-SSD Total Score
1,074 Pts Slightly stronger server IO.
1,008 Pts -7%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
84.7 MB/s Much faster peak deep queue mixed IO.
51.2 MB/s -65%
ADQ Read
Avg. 4K-64Thread Read Speed
199 MB/s Slightly faster deep queue read.
176 MB/s -13%
ADQ Write
Avg. 4K-64Thread Write Speed
153 MB/s Faster deep queue write.
129 MB/s -19%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
48.2 MB/s Much faster deep queue mixed IO.
30.4 MB/s -59%
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) October 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 $300Nvidia GTX 1070 $394Samsung 850 Evo 250GB $98
AMD Ryzen 7 1700 $280AMD RX 480 $491Samsung 850 Pro 256GB $126
Intel Core i5-7600K $230Nvidia GTX 1060-6GB $260Samsung 850 Evo 500GB $150
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $163SanDisk Extreme 64GB $33
Seagate Barracuda 3TB (2016) $75G.SKILL Trident Z DDR4 3200 C14 4x16GB $842SanDisk Extreme 32GB $22
Seagate Barracuda 2TB (2016) $60Corsair Vengeance LPX DDR4 3200 C16 2x8GB $180SanDisk Ultra Fit 32GB $13
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