Real World Speed
Performance profile from 11,622 user samples
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
65.6 % -29% 84.8 % Faster effective speed.
Avg. Sequential Read Speed
456 MB/s -8% 492 MB/s Slightly faster read speed.
Avg. Sequential Write Speed
246 MB/s -51% 373 MB/s Much faster write speed.
4K Read
Avg. 4K Random Read Speed
27.7 MB/s -7% 29.7 MB/s Slightly faster random read.
4K Write
Avg. 4K Random Write Speed
50.7 MB/s -48% 75 MB/s Much faster random write.
Avg. Sequential Mixed IO Speed
239 MB/s -62% 386 MB/s Much faster mixed IO speed.
4K Mixed
Avg. 4K Random Mixed IO Speed
14.8 MB/s -59% 23.6 MB/s Much faster random mixed IO.
Peak Sequential Read Speed
499 MB/s -4% 517 MB/s +4%
Peak Sequential Write Speed
341 MB/s -25% 427 MB/s Faster peak write speed.
4K Read
Peak 4K Random Read Speed
37.3 MB/s +1% 37 MB/s -1%
4K Write
Peak 4K Random Write Speed
81.4 MB/s -33% 108 MB/s Much faster peak random write.
Peak Sequential Mixed IO Speed
324 MB/s -35% 439 MB/s Much faster peak mixed IO speed.
4K Mixed
Peak 4K Random Mixed IO Speed
21 MB/s -54% 32.4 MB/s Much faster peak random mixed IO.
Market Share
Based on 4,120,634 SSDs tested.
User Rating
UBM User Rating
63 % -19% 74.9 % More popular.
Market Share
Market Share (trailing 30 days)
0.39 % -322% 1.65 % Hugely higher market share.
Price (score)
$88 Much cheaper.
147 USD -66%
Value For Money
67 % -1% 67.3 % +1%
DQ Read
Peak 4K-64Thread Read Speed
364 MB/s Slightly faster peak deep queue read.
339 MB/s -7%
DQ Write
Peak 4K-64Thread Write Speed
205 MB/s -45% 296 MB/s Much faster peak deep queue write.
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
51.2 MB/s -61% 82.3 MB/s Much faster peak deep queue mixed IO.
ADQ Read
Avg. 4K-64Thread Read Speed
176 MB/s -3% 182 MB/s +3%
ADQ Write
Avg. 4K-64Thread Write Speed
129 MB/s -46% 188 MB/s Much faster deep queue write.
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
30.4 MB/s -56% 47.5 MB/s Much faster deep queue mixed IO.
37 Months +3% 38.1 Months -3%
AS-SSD Total
AS-SSD Total Score
1,008 Pts -9% 1,103 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) 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

 Best User Rated

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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