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

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

Real World Speed
Performance profile from 31,903 user samples
16,122 User Benchmarks
Best Bench: 83% 58GB free
Worst Bench: 47% 151GB free
Poor: 47% Great: 83%
SPEED RANK: 491st / 927
15,781 User Benchmarks
Best Bench: 85% 206GB free
Worst Bench: 50% 36GB free
Poor: 50% Great: 85%
SPEED RANK: 416th / 927
Effective Speed
Effective SSD Speed
65.4 % 68.7 % Slightly faster effective speed.
Avg. Sequential Read Speed
458 MB/s 472 MB/s +3%
Avg. Sequential Write Speed
252 MB/s 277 MB/s Slightly faster write speed.
4K Read
Avg. 4K Random Read Speed
27.1 MB/s 27.3 MB/s +1%
4K Write
Avg. 4K Random Write Speed
49.6 MB/s 50.2 MB/s +1%
Avg. Sequential Mixed IO Speed
246 MB/s 275 MB/s Slightly faster mixed IO speed.
4K Mixed
Avg. 4K Random Mixed IO Speed
14.7 MB/s 14.9 MB/s +1%
Peak Sequential Read Speed
500 MB/s 501 MB/s +0%
Peak Sequential Write Speed
344 MB/s 349 MB/s +1%
4K Read
Peak 4K Random Read Speed
36.4 MB/s +0% 36.3 MB/s
4K Write
Peak 4K Random Write Speed
76.7 MB/s 79.1 MB/s +3%
Peak Sequential Mixed IO Speed
329 MB/s 339 MB/s +3%
4K Mixed
Peak 4K Random Mixed IO Speed
20.7 MB/s 21.1 MB/s +2%
Market Share
Based on 6,772,650 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.45 % Slightly higher market share.
0.41 %
Value For Money
79.6 % 88.4 % Slightly better value.
User Rating
UBM User Rating
65 % +3% 63 %
Price (score)
$70 Much cheaper.
44 Months 44 Months
DQ Read
Peak 4K-64Thread Read Speed
349 MB/s 365 MB/s +5%
DQ Write
Peak 4K-64Thread Write Speed
204 MB/s 208 MB/s +2%
AS-SSD Total
AS-SSD Total Score
979 Pts 1,010 Pts +3%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
50.7 MB/s 51 MB/s +1%
ADQ Read
Avg. 4K-64Thread Read Speed
170 MB/s 197 MB/s Faster deep queue read.
ADQ Write
Avg. 4K-64Thread Write Speed
127 MB/s 143 MB/s Slightly faster deep queue write.
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
30.4 MB/s +2% 29.9 MB/s
240GB 480GB

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) May 2018 SSD Rankings.

Welcome to our 2.5" and M.2 SSD comparison. We calculate effective speed for both SATA and NVMe drives based on real world performance then adjust by current prices per GB to yield a value for money rating. Our calculated values are checked against thousands of individual user ratings. The customizable table below combines these factors to bring you the definitive list of top SSDs. [SSDrivePro]


Group Test Results

  • Best user rated - Sometimes benchmarks get it completely wrong...
  • Fastest real world speed - Real World Speed measures performance for typical consumers.
  • Best value for money - Value for money is based on real world performance, price and capacity.
  • Raw speed comparison - Raw speed readings.
  • Details ordered by value - Detailed performance stats ordered by overall value for money.
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

 Best User Rated

The Best.
AMD Ryzen 5 1600 $169Nvidia GTX 1070 $447Samsung 850 Evo 250GB $100
Intel Core i7-8700K $325Nvidia GTX 1060-6GB $295Samsung 850 Evo 500GB $137
Intel Core i7-7700K $299AMD RX 480 $330Samsung 850 Pro 256GB $163
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $180SanDisk Extreme 64GB $41
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $960SanDisk Extreme 32GB $30
Seagate Barracuda 2TB (2016) $60HyperX Fury DDR4 2133 C14 2x8GB $226SanDisk Extreme 16GB $20
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