Controller: Indilinx Barefoot 3. Flash Memory: Toshiba A19nm MLC.

Controller: Samsung 3-core MDX. Flash Memory: Samsung 21nm Toggle Mode MLC.

Real World Speed
Performance profile from 15,813 user samples
2,090 User Benchmarks
Best Bench: 93% 50GB free
Worst Bench: 62% 83GB free
Poor: 62% Great: 93%
SPEED RANK: 271st / 908
13,723 User Benchmarks
Best Bench: 99% 30GB free
Worst Bench: 55% 4GB free
Poor: 55% Great: 99%
SPEED RANK: 250th / 908
Effective Speed
Effective SSD Speed
76.5 % 78 % +2%
Avg. Sequential Read Speed
435 MB/s 485 MB/s Slightly faster read speed.
Avg. Sequential Write Speed
361 MB/s Faster write speed.
305 MB/s
4K Read
Avg. 4K Random Read Speed
23.2 MB/s 28.6 MB/s Faster random read.
4K Write
Avg. 4K Random Write Speed
79.3 MB/s +5% 75.7 MB/s
Avg. Sequential Mixed IO Speed
382 MB/s Faster mixed IO speed.
331 MB/s
4K Mixed
Avg. 4K Random Mixed IO Speed
17.3 MB/s 20 MB/s Faster random mixed IO.
Peak Sequential Read Speed
458 MB/s 521 MB/s Slightly faster peak read speed.
Peak Sequential Write Speed
383 MB/s 438 MB/s Slightly faster peak write speed.
4K Read
Peak 4K Random Read Speed
28.4 MB/s 35.5 MB/s Faster peak random read.
4K Write
Peak 4K Random Write Speed
121 MB/s Slightly faster peak random write.
110 MB/s
Peak Sequential Mixed IO Speed
411 MB/s 471 MB/s Slightly faster peak mixed IO speed.
4K Mixed
Peak 4K Random Mixed IO Speed
23.8 MB/s 25.8 MB/s Slightly faster peak random mixed IO.
Market Share
Based on 6,034,146 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.06 % 0.27 % Hugely higher market share.
Value For Money
49 % Much better value.
31.9 %
User Rating
UBM User Rating
62 % 63 % +2%
Price (score)
$82 Much cheaper.
43 Months Much more recent.
65 Months
DQ Read
Peak 4K-64Thread Read Speed
305 MB/s 360 MB/s Faster peak deep queue read.
DQ Write
Peak 4K-64Thread Write Speed
341 MB/s Slightly faster peak deep queue write.
306 MB/s
AS-SSD Total
AS-SSD Total Score
1,080 Pts 1,145 Pts Slightly stronger server IO.
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
73.2 MB/s 78.8 MB/s Slightly faster peak deep queue mixed IO.
ADQ Read
Avg. 4K-64Thread Read Speed
160 MB/s 183 MB/s Slightly faster deep queue read.
ADQ Write
Avg. 4K-64Thread Write Speed
199 MB/s Faster deep queue write.
173 MB/s
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
42.1 MB/s 46.7 MB/s Slightly faster deep queue mixed IO.
120GB 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) 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 userbenchmark.com.
  • - 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 $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
Today's hottest deals
User Guide  •  About  •  FAQs  •  Email  •  Privacy  •  Developer Feedback