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


Controller: Phison PS3110-S10. NAND Flash: Toshiba 19nm MLC.

Real World Speed
Performance profile from 4,807 user samples
4,102 User Benchmarks
Best Bench: 106% 197GB free
Worst Bench: 57% 20GB free
Poor: 57% Great: 106%
SPEED RANK: 173rd / 908
705 User Benchmarks
Best Bench: 102% 223GB free
Worst Bench: 53% 206GB free
Poor: 53% Great: 102%
SPEED RANK: 203rd / 908
Effective Speed
Effective SSD Speed
83.2 % +2% 81.5 %
Avg. Sequential Read Speed
472 MB/s 494 MB/s +5%
Avg. Sequential Write Speed
413 MB/s 416 MB/s +1%
4K Read
Avg. 4K Random Read Speed
27.3 MB/s 28.2 MB/s +3%
4K Write
Avg. 4K Random Write Speed
69.9 MB/s 70.6 MB/s +1%
Avg. Sequential Mixed IO Speed
411 MB/s 442 MB/s Slightly faster mixed IO speed.
4K Mixed
Avg. 4K Random Mixed IO Speed
21.2 MB/s Much faster random mixed IO.
13.6 MB/s
Peak Sequential Read Speed
515 MB/s 526 MB/s +2%
Peak Sequential Write Speed
495 MB/s 508 MB/s +3%
4K Read
Peak 4K Random Read Speed
35.3 MB/s 36.8 MB/s +4%
4K Write
Peak 4K Random Write Speed
111 MB/s 113 MB/s +2%
Peak Sequential Mixed IO Speed
483 MB/s 514 MB/s Slightly faster peak mixed IO speed.
4K Mixed
Peak 4K Random Mixed IO Speed
29.5 MB/s Hugely faster peak random mixed IO.
16.1 MB/s
Market Share
Based on 6,034,146 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.09 % Hugely higher market share.
0.01 %
Value For Money
74.7 % Much better value.
51 %
User Rating
UBM User Rating
64 % +3% 62 %
Price (score)
$105 Much cheaper.
45 Months 39 Months Slightly more recent.
DQ Read
Peak 4K-64Thread Read Speed
358 MB/s +0% 357 MB/s
DQ Write
Peak 4K-64Thread Write Speed
316 MB/s 343 MB/s Slightly faster peak deep queue write.
AS-SSD Total
AS-SSD Total Score
1,160 Pts 1,194 Pts +3%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
65.3 MB/s +2% 64.3 MB/s
ADQ Read
Avg. 4K-64Thread Read Speed
167 MB/s 169 MB/s +1%
ADQ Write
Avg. 4K-64Thread Write Speed
181 MB/s 207 MB/s Slightly faster deep queue write.
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
42.6 MB/s Hugely faster deep queue mixed IO.
23.6 MB/s
240GB 240GB

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]


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 $141
Intel Core i5-8600K $235AMD RX 480 $400Samsung 850 Pro 256GB $160
Seagate Barracuda 1TB (2016) $44Corsair Vengeance LPX DDR4 3000 C15 2x8GB $170SanDisk Extreme 64GB $44
Seagate Barracuda 3TB (2016) $75G.SKILL Trident Z DDR4 3200 C14 4x16GB $931SanDisk Extreme 32GB $23
Seagate Barracuda 2TB (2016) $60Corsair Vengeance LPX DDR4 3200 C16 2x8GB $205SanDisk Extreme 16GB $18
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