Controller: Marvell 88SS9189. Flash Memory: Micron 16nm MLC.

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

Real World Speed
Performance profile from 18,929 user samples
6,531 User Benchmarks
Best Bench: 101% 77GB free
Worst Bench: 62% 203GB free
Poor: 62% Great: 101%
SPEED RANK: 150th / 873
12,398 User Benchmarks
Best Bench: 84% 152GB free
Worst Bench: 46% 7GB free
Poor: 46% Great: 84%
SPEED RANK: 421st / 873
Effective Speed
Effective SSD Speed
83.4 % Faster effective speed.
65.7 % -27%
Avg. Sequential Read Speed
504 MB/s Slightly faster read speed.
453 MB/s -11%
Avg. Sequential Write Speed
370 MB/s Much faster write speed.
250 MB/s -48%
4K Read
Avg. 4K Random Read Speed
27 MB/s -1% 27.3 MB/s +1%
4K Write
Avg. 4K Random Write Speed
70.7 MB/s Much faster random write.
50.9 MB/s -39%
Avg. Sequential Mixed IO Speed
379 MB/s Much faster mixed IO speed.
241 MB/s -57%
4K Mixed
Avg. 4K Random Mixed IO Speed
24 MB/s Much faster random mixed IO.
14.6 MB/s -64%
Peak Sequential Read Speed
527 MB/s Slightly faster peak read speed.
498 MB/s -6%
Peak Sequential Write Speed
400 MB/s Faster peak write speed.
339 MB/s -18%
4K Read
Peak 4K Random Read Speed
33.2 MB/s -12% 37.1 MB/s Slightly faster peak random read.
4K Write
Peak 4K Random Write Speed
102 MB/s Faster peak random write.
81.5 MB/s -25%
Peak Sequential Mixed IO Speed
416 MB/s Faster peak mixed IO speed.
326 MB/s -28%
4K Mixed
Peak 4K Random Mixed IO Speed
34.2 MB/s Much faster peak random mixed IO.
21.3 MB/s -61%
Market Share
Based on 4,734,658 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.23 % -104% 0.47 % Hugely higher market share.
Value For Money
64.3 % -18% 76 % Better value.
User Rating
UBM User Rating
68 % Slightly more popular.
63 % -8%
Price (score)
$134 -44% $75 Much cheaper.
35 Months Slightly more recent.
39 Months -10%
DQ Read
Peak 4K-64Thread Read Speed
359 MB/s -1% 362 MB/s +1%
DQ Write
Peak 4K-64Thread Write Speed
280 MB/s Much faster peak deep queue write.
209 MB/s -34%
AS-SSD Total
AS-SSD Total Score
1,100 Pts Slightly stronger server IO.
1,008 Pts -9%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
66.8 MB/s Faster peak deep queue mixed IO.
51.4 MB/s -30%
ADQ Read
Avg. 4K-64Thread Read Speed
181 MB/s -1% 183 MB/s +1%
ADQ Write
Avg. 4K-64Thread Write Speed
176 MB/s Much faster deep queue write.
133 MB/s -32%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
41.7 MB/s Much faster deep queue mixed IO.
30.1 MB/s -39%
250GB 240GB

The 250GB Crucial MX200 is successor to the hugely successful MX100. Both drives use the same NAND and controller but the new MX200 features Dynamic Write Acceleration (DWA) which is a new dynamically sized SLC cache. Samsung were the first to introduce SLC caching on the 840 Evo nearly two years ago so Crucial are somewhat late to the party. SLC caches generally only help performance in corner case real word scenarios and benchmarks. I prefer drives without SLC caches because they offer more consistent and sustainable real world IO. Comparing the MX100 and MX200 shows that the newer MX200 has a significantly faster peak write speed which is of course explained by the new DWA cache. Price is the deciding factor between the MX100 and MX200 so although the MX200 isn't priced aggressively yet, it will almost certainly move up the value rankings when retailers build stocks and subsequently cut prices. [Feb '15 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 $430Samsung 850 Evo 250GB $88
AMD Ryzen 7 1700 $285AMD RX 480 $265Samsung 850 Pro 256GB $113
Intel Core i5-7600K $215Nvidia GTX 1060-6GB $260Samsung 850 Evo 500GB $140
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $205SanDisk Extreme 64GB $41
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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