Group Average(9 Highest-Voted)
Real World Speed
Performance profile from 8,652 user samples
8,652 User Benchmarks
Best Bench: 84% 122GB free
Worst Bench: 47% 44GB free
Poor: 47% Great: 84%
SPEED RANK: 407th / 857
Effective Speed
Effective SSD Speed
66 % -25% 82.4 % Faster effective speed.
Avg. Sequential Read Speed
457 MB/s -6% 485 MB/s Slightly faster read speed.
Avg. Sequential Write Speed
246 MB/s -48% 364 MB/s Much faster write speed.
4K Read
Avg. 4K Random Read Speed
28.1 MB/s -6% 29.7 MB/s Slightly faster random read.
4K Write
Avg. 4K Random Write Speed
51.5 MB/s -35% 69.7 MB/s Much faster random write.
Avg. Sequential Mixed IO Speed
242 MB/s -54% 373 MB/s Much faster mixed IO speed.
4K Mixed
Avg. 4K Random Mixed IO Speed
14.6 MB/s -53% 22.4 MB/s Much faster random mixed IO.
Peak Sequential Read Speed
498 MB/s -3% 514 MB/s +3%
Peak Sequential Write Speed
339 MB/s -26% 428 MB/s Faster peak write speed.
4K Read
Peak 4K Random Read Speed
38.3 MB/s +1% 37.8 MB/s -1%
4K Write
Peak 4K Random Write Speed
82.4 MB/s -26% 104 MB/s Faster peak random write.
Peak Sequential Mixed IO Speed
324 MB/s -33% 431 MB/s Much faster peak mixed IO speed.
4K Mixed
Peak 4K Random Mixed IO Speed
21.1 MB/s -47% 30.9 MB/s Much faster peak random mixed IO.
Market Share
Based on 3,517,083 SSDs tested.
User Rating
UBM User Rating
63 % -17% 73.7 % More popular.
Market Share
Market Share (trailing 30 days)
0.67 % -168% 1.8 % Hugely higher market share.
Price (score)
$85 Much cheaper.
124 USD -45%
Value For Money
69.5 % -0% 69.6 % +0%
DQ Read
Peak 4K-64Thread Read Speed
360 MB/s +2% 351 MB/s -2%
DQ Write
Peak 4K-64Thread Write Speed
209 MB/s -36% 285 MB/s Much faster peak deep queue write.
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
51.2 MB/s -61% 82.4 MB/s Much faster peak deep queue mixed IO.
ADQ Read
Avg. 4K-64Thread Read Speed
180 MB/s -2% 184 MB/s +2%
ADQ Write
Avg. 4K-64Thread Write Speed
133 MB/s -30% 173 MB/s Much faster deep queue write.
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
30.3 MB/s -57% 47.6 MB/s Much faster deep queue mixed IO.
35 Months +2% 35.8 Months -2%
AS-SSD Total
AS-SSD Total Score
1,009 Pts -10% 1,107 Pts Slightly stronger server IO.
240GB   —

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) August 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 $410Samsung 850 Evo 250GB $99
AMD Ryzen 7 1700 $280AMD RX 480 $390Samsung 850 Pro 256GB $133
Intel Core i5-7600K $212Nvidia GTX 1060-6GB $271Samsung 850 Evo 500GB $165
Seagate Barracuda 1TB (2016) $45G.SKILL Trident Z DDR4 3200 C14 4x16GB $718SanDisk Extreme 64GB $45
Seagate Barracuda 3TB (2016) $83Corsair Vengeance LPX DDR4 3000 C15 2x8GB $140SanDisk Extreme 32GB $22
Seagate Barracuda 7200.14 1TB $55HyperX Fury DDR4 2133 C14 2x8GB $140SanDisk Ultra Fit 32GB $13
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