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

Controller: LSI SandForce SF2281. NAND Memory: Micron 20nm MLC.

Real World Speed
Performance profile from 21,105 user samples
9,703 User Benchmarks
Best Bench: 101% 20GB free
Worst Bench: 58% 13GB free
Poor: 58% Great: 101%
SPEED RANK: 202nd / 859
11,402 User Benchmarks
Best Bench: 65% 76GB free
Worst Bench: 42% 14GB free
Poor: 42% Great: 65%
SPEED RANK: 584th / 859
Effective Speed
Effective SSD Speed
79.8 % Much faster effective speed.
54.5 % -46%
Avg. Sequential Read Speed
488 MB/s Slightly faster read speed.
438 MB/s -11%
Avg. Sequential Write Speed
311 MB/s Hugely faster write speed.
115 MB/s -170%
4K Read
Avg. 4K Random Read Speed
29.1 MB/s Much faster random read.
21.4 MB/s -36%
4K Write
Avg. 4K Random Write Speed
77.9 MB/s -1% 78.5 MB/s +1%
Avg. Sequential Mixed IO Speed
340 MB/s Hugely faster mixed IO speed.
159 MB/s -114%
4K Mixed
Avg. 4K Random Mixed IO Speed
20.1 MB/s Much faster random mixed IO.
12.7 MB/s -58%
Peak Sequential Read Speed
521 MB/s +2% 510 MB/s -2%
Peak Sequential Write Speed
439 MB/s Hugely faster peak write speed.
140 MB/s -214%
4K Read
Peak 4K Random Read Speed
36.1 MB/s Faster peak random read.
30.3 MB/s -19%
4K Write
Peak 4K Random Write Speed
115 MB/s +5% 110 MB/s -5%
Peak Sequential Mixed IO Speed
476 MB/s Hugely faster peak mixed IO speed.
207 MB/s -130%
4K Mixed
Peak 4K Random Mixed IO Speed
25.9 MB/s Much faster peak random mixed IO.
18 MB/s -44%
Market Share
Based on 3,849,016 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.55 % -42% 0.78 % Much higher market share.
Value For Money
32.6 % -29% 42.2 % Better value.
User Rating
UBM User Rating
63 % +5% 60 % -5%
Price (score)
$160 -60% $64 Much cheaper.
59 Months -34% 39 Months Much more recent.
DQ Read
Peak 4K-64Thread Read Speed
366 MB/s Hugely faster peak deep queue read.
106 MB/s -245%
DQ Write
Peak 4K-64Thread Write Speed
316 MB/s Hugely faster peak deep queue write.
144 MB/s -119%
AS-SSD Total
AS-SSD Total Score
1,170 Pts Hugely stronger server IO.
546 Pts -114%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
79.3 MB/s Hugely faster peak deep queue mixed IO.
37.1 MB/s -114%
ADQ Read
Avg. 4K-64Thread Read Speed
204 MB/s Hugely faster deep queue read.
62 MB/s -229%
ADQ Write
Avg. 4K-64Thread Write Speed
184 MB/s Much faster deep queue write.
114 MB/s -61%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
48 MB/s Hugely faster deep queue mixed IO.
22.4 MB/s -114%
128GB 120GB

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]


The Kingston HyperX Fury has the same controller as its HyperX 3K sibling; the only difference between the two drives is the use of cheaper Micron 20nm NAND in the newer Fury. Comparing the performance differences between the HyperX Fury and 3K shows that the newer 20nm NAND results in an effective performance decrease of around 30% for a price saving of just 12%. The Fury was never aimed at the high performance sector of the market but given the known compressible performance weaknesses of its Sandforce 2281 controller and its relatively non-budget price tag, the 120GB Fury will struggle to find rational takers in today's market. There are far better value alternatives available for just a few more dollars. [Sep '14 SSDrivePro]


Solid State Drive Rankings (Price vs Performance) September 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

 Best User Rated

The Best.
Intel Core i7-7700K $297Nvidia GTX 1070 $410Samsung 850 Evo 250GB $97
AMD Ryzen 7 1700 $270AMD RX 480 $350Samsung 850 Pro 256GB $120
Intel Core i5-7600K $220Nvidia GTX 1060-6GB $265Samsung 850 Evo 500GB $149
Seagate Barracuda 1TB (2016) $45G.SKILL Trident Z DDR4 3200 C14 4x16GB $724SanDisk Extreme 64GB $33
Seagate Barracuda 3TB (2016) $77Corsair Vengeance LPX DDR4 3000 C15 2x8GB $152SanDisk Extreme 32GB $22
Seagate Barracuda 7200.14 1TB $40HyperX Fury DDR4 2133 C14 2x8GB $141SanDisk Extreme 16GB $20
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