Controller: Marvell 88SS9187-BLD2. Flash Memory: SanDisk 19nm eX2 ABL MLC.

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

Real World Speed
Performance profile from 20,282 user samples
4,140 User Benchmarks
Best Bench: 106% 197GB free
Worst Bench: 56% 223GB free
Poor: 56% Great: 106%
SPEED RANK: 175th / 911
16,142 User Benchmarks
Best Bench: 82% 188GB free
Worst Bench: 49% 168GB free
Poor: 49% Great: 82%
SPEED RANK: 392nd / 911
Effective Speed
Effective SSD Speed
83.2 % Faster effective speed.
68.4 %
Avg. Sequential Read Speed
472 MB/s +2% 462 MB/s
Avg. Sequential Write Speed
414 MB/s Much faster write speed.
297 MB/s
4K Read
Avg. 4K Random Read Speed
27.4 MB/s Faster random read.
22.7 MB/s
4K Write
Avg. 4K Random Write Speed
69.6 MB/s Faster random write.
57.7 MB/s
Avg. Sequential Mixed IO Speed
410 MB/s Much faster mixed IO speed.
307 MB/s
4K Mixed
Avg. 4K Random Mixed IO Speed
21.2 MB/s Faster random mixed IO.
17.4 MB/s
Peak Sequential Read Speed
515 MB/s Slightly faster peak read speed.
484 MB/s
Peak Sequential Write Speed
495 MB/s Much faster peak write speed.
339 MB/s
4K Read
Peak 4K Random Read Speed
35.4 MB/s Faster peak random read.
27.4 MB/s
4K Write
Peak 4K Random Write Speed
110 MB/s Much faster peak random write.
79.7 MB/s
Peak Sequential Mixed IO Speed
484 MB/s Much faster peak mixed IO speed.
339 MB/s
4K Mixed
Peak 4K Random Mixed IO Speed
29.6 MB/s Faster peak random mixed IO.
24.3 MB/s
Market Share
Based on 6,063,115 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.1 % 0.61 % Hugely higher market share.
Value For Money
74.7 % 83.5 % Slightly better value.
User Rating
UBM User Rating
64 % 67 % +5%
Price (score)
$105 $80 Cheaper.
45 Months 21 Months Much more recent.
DQ Read
Peak 4K-64Thread Read Speed
360 MB/s Much faster peak deep queue read.
230 MB/s
DQ Write
Peak 4K-64Thread Write Speed
314 MB/s Much faster peak deep queue write.
221 MB/s
AS-SSD Total
AS-SSD Total Score
1,161 Pts Much stronger server IO.
800 Pts
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
65.3 MB/s Much faster peak deep queue mixed IO.
40.4 MB/s
ADQ Read
Avg. 4K-64Thread Read Speed
168 MB/s Faster deep queue read.
135 MB/s
ADQ Write
Avg. 4K-64Thread Write Speed
181 MB/s Much faster deep queue write.
133 MB/s
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
42.7 MB/s Much faster deep queue mixed IO.
26.2 MB/s
240GB 275GB

The 240GB Sandisk Extreme Pro uses the same controller and NAND as its 13 months younger predecessor, the Extreme II. Comparing the Extreme II and Extreme Pro shows that average performance has increased by 10% but peak performance remains broadly unchanged. The Pro features an improved nCache which uses an SLC buffer to cache writes prior to writing them to the slower MLC NAND. In order to benefit from this improved caching, huge amounts of data need to be written for extended periods, an unlikely consumer scenario. Comparing core performance between the Samsung 840 Evo and Extreme Pro shows that the Extreme Pro averages around 12% faster than the Evo. The Extreme Pro also has a 10 year warranty but I wonder if SATA 3 will even be around at that time. Although the Extreme Pro has a superb performance profile it's not a game changer. [Jun '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) 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

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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 $146
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
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