Group Average(9 Highest-Voted)
Real World Speed
Performance profile from 13,630 user samples
13,630 User Benchmarks
Best Bench: 81% 28GB free
Worst Bench: 47% 186GB free
Poor: 47% Great: 81%
SPEED RANK: 473rd / 911
Effective Speed
Effective SSD Speed
64.1 % 82.3 % Faster effective speed.
Avg. Sequential Read Speed
454 MB/s 488 MB/s Slightly faster read speed.
Avg. Sequential Write Speed
237 MB/s 366 MB/s Much faster write speed.
4K Read
Avg. 4K Random Read Speed
27.1 MB/s 28.5 MB/s Slightly faster random read.
4K Write
Avg. 4K Random Write Speed
48.2 MB/s 70 MB/s Much faster random write.
Avg. Sequential Mixed IO Speed
234 MB/s 380 MB/s Much faster mixed IO speed.
4K Mixed
Avg. 4K Random Mixed IO Speed
14.3 MB/s 23.4 MB/s Much faster random mixed IO.
Peak Sequential Read Speed
498 MB/s 516 MB/s +4%
Peak Sequential Write Speed
340 MB/s 414 MB/s Faster peak write speed.
4K Read
Peak 4K Random Read Speed
36.6 MB/s +2% 35.9 MB/s
4K Write
Peak 4K Random Write Speed
76.6 MB/s 101 MB/s Much faster peak random write.
Peak Sequential Mixed IO Speed
331 MB/s 426 MB/s Faster peak mixed IO speed.
4K Mixed
Peak 4K Random Mixed IO Speed
20.8 MB/s 32.9 MB/s Much faster peak random mixed IO.
Market Share
Based on 6,060,662 SSDs tested.
User Rating
UBM User Rating
64 % 76.2 % More popular.
Market Share
Market Share (trailing 30 days)
0.45 % 1.1 % Hugely higher market share.
Price (score)
$75 Much cheaper.
103 USD
Value For Money
74.1 % 79.1 % Slightly better value.
DQ Read
Peak 4K-64Thread Read Speed
349 MB/s Slightly faster peak deep queue read.
328 MB/s
DQ Write
Peak 4K-64Thread Write Speed
206 MB/s 283 MB/s Much faster peak deep queue write.
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
51.4 MB/s 77.6 MB/s Much faster peak deep queue mixed IO.
ADQ Read
Avg. 4K-64Thread Read Speed
175 MB/s Slightly faster deep queue read.
166 MB/s
ADQ Write
Avg. 4K-64Thread Write Speed
130 MB/s 175 MB/s Much faster deep queue write.
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
31.1 MB/s 44.5 MB/s Much faster deep queue mixed IO.
42 Months 34.7 Months More recent.
AS-SSD Total
AS-SSD Total Score
980 Pts 1,062 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) March 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.
Intel Core i7-8700K $330Nvidia GTX 1070 $447Samsung 850 Evo 250GB $85
Intel Core i7-7700K $290Nvidia GTX 1060-6GB $335Samsung 850 Evo 500GB $150
AMD Ryzen 5 1600 $188AMD RX 480 $400Samsung 850 Pro 256GB $139
Seagate Barracuda 1TB (2016) $44Corsair Vengeance LPX DDR4 3000 C15 2x8GB $190SanDisk Extreme 64GB $44
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $931SanDisk Extreme 32GB $23
Seagate Barracuda 2TB (2016) $60Corsair Vengeance LPX DDR4 3200 C16 2x8GB $216SanDisk Extreme 16GB $18
Today's hottest deals
User Guide  •  About  •  FAQs  •  Email  •  Privacy  •  Developer Feedback