Group Average(9 Highest-Voted)
Real World Speed
Performance profile from 15,875 user samples
15,875 User Benchmarks
Best Bench: 111% 43GB free
Worst Bench: 62% 32GB free (System drive)
Poor: 62% Great: 111%
SPEED RANK: 250th / 980
Effective Speed
Effective SSD Speed
88.2 % Slightly faster effective speed.
83.6 %
Avg. Sequential Read Speed
441 MB/s +4% 422 MB/s
Avg. Sequential Write Speed
320 MB/s +2% 315 MB/s
4K Read
Avg. 4K Random Read Speed
30.5 MB/s +1% 30.1 MB/s
4K Write
Avg. 4K Random Write Speed
85.4 MB/s 86 MB/s +1%
Avg. Sequential Mixed IO Speed
258 MB/s 267 MB/s +4%
4K Mixed
Avg. 4K Random Mixed IO Speed
35.7 MB/s 36.5 MB/s +2%
Avg. Sustained Write Speed
261 MB/s Faster sustained write speed.
211 MB/s
Peak Sequential Read Speed
494 MB/s +3% 480 MB/s
Peak Sequential Write Speed
445 MB/s Faster peak write speed.
371 MB/s
4K Read
Peak 4K Random Read Speed
37 MB/s 37.1 MB/s +0%
4K Write
Peak 4K Random Write Speed
119 MB/s 122 MB/s +3%
Peak Sequential Mixed IO Speed
328 MB/s +3% 318 MB/s
4K Mixed
Peak 4K Random Mixed IO Speed
44.3 MB/s 46 MB/s +4%
Peak Sequential Sustained Write 60s Average
434 MB/s Much faster peak sustained write speed.
292 MB/s
Market Share
Based on 11,464,199 SSDs tested.
User Rating
UBM User Rating
63 % 63.8 % +1%
Market Share
Market Share (trailing 30 days)
0.18 % 0.18 % +1%
Price (score)
$160 107 USD Much cheaper.
Value For Money
36 % 47.6 % Much better value.
DQ Read
Peak 4K-64Thread Read Speed
376 MB/s Faster peak deep queue read.
317 MB/s
DQ Write
Peak 4K-64Thread Write Speed
323 MB/s Slightly faster peak deep queue write.
293 MB/s
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
155 MB/s 221 MB/s Much faster peak deep queue mixed IO.
ADQ Read
Avg. 4K-64Thread Read Speed
327 MB/s Faster deep queue read.
269 MB/s
ADQ Write
Avg. 4K-64Thread Write Speed
240 MB/s +1% 237 MB/s
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
121 MB/s 176 MB/s Much faster deep queue mixed IO.
75 Months 62.2 Months More recent.
AS-SSD Total
AS-SSD Total Score
1,196 Pts Slightly stronger server IO.
1,068 Pts
128GB   —

The 128GB 840 Pro is a rock solid performer. On release, nearly a year and a half ago, the Pro smashed several speed records. Today, with sequential read/write speeds of 519/438 MBps, the Pro is still one of the fastest SSDs available. One of the Pro's top competitors is Samsungs own, newer 840 Evo. Looking at a raw synthetic speed comparison of the 128GB Pro and Evo is a little misleading. On the face of it the Pro only has a marginal lead over the Evo. This due to the fact that the Evo can only maintain its burst write speed for transfers of up to 3GB, the size of its SLC cache. The Pro on the other hand can sustain higher throughputs indefinitely. The Pro also utilizes MLC which is rated for far more erase cycles than the TLC used in the Evo. Server IO is often continuous and would quickly exhaust the 3GB cache on the Evo but for typical consumer use the Evo will remain within the SLC cache most of the time. [Feb '14 SSDrivePro]


Solid State Drive Rankings (Price vs Performance) January 2019 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 - User sentiment trumps benchmarks for this comparison.
  • Best value for money - Value for money is based on real world performance.
  • Fastest real world speed - Real World Speed measures performance for typical consumers.
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.
  • - CPU tests include: integer, floating and string.
  • - GPU tests include: six 3D game simulations.
  • - Drive tests include: read, write, sustained write and mixed IO.
  • - 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 current market leaders.
  • - Explore your best upgrade options with a virtual PC build.
  • - Compare your in-game FPS to other users with your hardware.
  • - Share your opinion by voting.

 Frequently Asked Questions

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The Best.
Intel Core i7-8700K $360Nvidia GTX 1070 $320Samsung 850 Evo 250GB $70
AMD Ryzen 5 1600 $150Nvidia GTX 1060-6GB $240Samsung 850 Evo 500GB $110
Intel Core i5-8600K $260Nvidia GTX 1080-Ti $808Samsung 850 Pro 256GB $163
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $115SanDisk Extreme 64GB $43
Seagate Barracuda 3TB (2016) $85G.SKILL Trident Z DDR4 3200 C14 4x16GB $780SanDisk Extreme 32GB $48
WD Blue 1TB (2012) $45Corsair Vengeance LPX DDR4 3200 C16 2x8GB $125SanDisk Extreme 16GB $22
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