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

Controller: Marvell 88SS1074. Flash Memory: Micron 3D TLC.

Real World Speed
Performance profile from 12,729 user samples
7,743 User Benchmarks
Best Bench: 84% 97GB free
Worst Bench: 47% 59GB free
Poor: 47% Great: 84%
SPEED RANK: 399th / 850
4,986 User Benchmarks
Best Bench: 83% 54GB free
Worst Bench: 50% 153GB free
Poor: 50% Great: 83%
SPEED RANK: 345th / 850
Effective Speed
Effective SSD Speed
66 % -4% 68.6 % +4%
Avg. Sequential Read Speed
455 MB/s -2% 462 MB/s +2%
Avg. Sequential Write Speed
245 MB/s -22% 299 MB/s Faster write speed.
4K Read
Avg. 4K Random Read Speed
28.2 MB/s Faster random read.
23 MB/s -23%
4K Write
Avg. 4K Random Write Speed
52.6 MB/s -13% 59.5 MB/s Slightly faster random write.
Avg. Sequential Mixed IO Speed
238 MB/s -29% 307 MB/s Faster mixed IO speed.
4K Mixed
Avg. 4K Random Mixed IO Speed
14.8 MB/s -14% 16.9 MB/s Slightly faster random mixed IO.
Peak Sequential Read Speed
498 MB/s +3% 485 MB/s -3%
Peak Sequential Write Speed
335 MB/s -1% 338 MB/s +1%
4K Read
Peak 4K Random Read Speed
37.3 MB/s Much faster peak random read.
28 MB/s -33%
4K Write
Peak 4K Random Write Speed
82.1 MB/s -4% 85 MB/s +4%
Peak Sequential Mixed IO Speed
322 MB/s -5% 339 MB/s Slightly faster peak mixed IO speed.
4K Mixed
Peak 4K Random Mixed IO Speed
21.3 MB/s -15% 24.5 MB/s Faster peak random mixed IO.
Market Share
Based on 2,859,716 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.58 % -29% 0.75 % Higher market share.
Value For Money
64.4 % -14% 73.6 % Slightly better value.
User Rating
UBM User Rating
65 % +3% 63 % -3%
Price (score)
$94 +1% $95 -1%
32 Months -66% 11 Months Much more recent.
DQ Read
Peak 4K-64Thread Read Speed
346 MB/s Much faster peak deep queue read.
230 MB/s -50%
DQ Write
Peak 4K-64Thread Write Speed
209 MB/s -7% 223 MB/s Slightly faster peak deep queue write.
AS-SSD Total
AS-SSD Total Score
985 Pts Stronger server IO.
808 Pts -22%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
51.4 MB/s Faster peak deep queue mixed IO.
40.3 MB/s -28%
ADQ Read
Avg. 4K-64Thread Read Speed
173 MB/s Much faster deep queue read.
126 MB/s -37%
ADQ Write
Avg. 4K-64Thread Write Speed
134 MB/s -4% 139 MB/s +4%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
30.2 MB/s Faster deep queue mixed IO.
25.2 MB/s -20%
240GB 275GB

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]


The 275GB Crucial MX300 supersedes the MX200. Unlike its predecessor, the MX300 is TLC based and therefore suffers from weak write speeds in comparison to MLC drives. The MX300 utilises a sophisticated algorithm to enable fast burst write speeds provided that there is sufficient free space on the disk but as the drive fills up write performance drops to the relatively poor levels seen on other TLC drives (similar to mechanical drives). At current prices (70 USD) the MX300 competes well with other low end drives such as the OCZ Trion, Adata SP550 and Samsung 750 EVO. As stocks build the MX300 is likely to see further price cuts, so it could become a very interesting value proposition. See the current value leaders here[Sep '16 SSDrivePro]


Solid State Drive Rankings (Price vs Performance) May 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 $309Nvidia GTX 1070 $368Samsung 850 Evo 250GB $99
Intel Core i5-7600K $229AMD RX 480 $227Samsung 850 Pro 256GB $132
AMD Ryzen 7 1700 $300Nvidia GTX 1060-6GB $230Samsung 850 Evo 500GB $160
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $127SanDisk Extreme 64GB $33
Seagate Barracuda 3TB (2016) $85G.SKILL Trident Z DDR4 3200 C14 4x16GB $700SanDisk Extreme 32GB $22
Seagate Barracuda 7200.14 1TB $46Corsair Vengeance LPX DDR4 3200 C16 2x8GB $136SanDisk Ultra Fit 32GB $12
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