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

Controller: Silicon Motion SM2258. Flash Memory: Micron 3D TLC.

Real World Speed
Performance profile from 22,510 user samples
21,943 User Benchmarks
Best Bench: 106% 124GB free
Worst Bench: 55% 9GB free
Poor: 55% Great: 106%
SPEED RANK: 170th / 908
567 User Benchmarks
Best Bench: 104% 153GB free
Worst Bench: 61% 20GB free
Poor: 61% Great: 104%
SPEED RANK: 143rd / 908
Effective Speed
Effective SSD Speed
83.4 % 86.2 % +3%
Avg. Sequential Read Speed
490 MB/s 502 MB/s +2%
Avg. Sequential Write Speed
360 MB/s 374 MB/s +4%
4K Read
Avg. 4K Random Read Speed
28.5 MB/s 31 MB/s Slightly faster random read.
4K Write
Avg. 4K Random Write Speed
77.7 MB/s Slightly faster random write.
68 MB/s
Avg. Sequential Mixed IO Speed
391 MB/s 401 MB/s +3%
4K Mixed
Avg. 4K Random Mixed IO Speed
22.1 MB/s 28.7 MB/s Faster random mixed IO.
Peak Sequential Read Speed
523 MB/s 527 MB/s +1%
Peak Sequential Write Speed
494 MB/s Faster peak write speed.
398 MB/s
4K Read
Peak 4K Random Read Speed
36.1 MB/s 40 MB/s Slightly faster peak random read.
4K Write
Peak 4K Random Write Speed
113 MB/s Faster peak random write.
94.9 MB/s
Peak Sequential Mixed IO Speed
509 MB/s Faster peak mixed IO speed.
422 MB/s
4K Mixed
Peak 4K Random Mixed IO Speed
28.8 MB/s 41.7 MB/s Much faster peak random mixed IO.
Market Share
Based on 5,993,412 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.45 % Much higher market share.
0.27 %
Value For Money
35.8 % 97.8 % Hugely better value.
User Rating
UBM User Rating
63 % 67 % Slightly more popular.
Price (score)
$300 $80 Much cheaper.
65 Months 3 Months Hugely more recent.
DQ Read
Peak 4K-64Thread Read Speed
367 MB/s +3% 355 MB/s
DQ Write
Peak 4K-64Thread Write Speed
322 MB/s Faster peak deep queue write.
273 MB/s
AS-SSD Total
AS-SSD Total Score
1,184 Pts Slightly stronger server IO.
1,093 Pts
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
90.5 MB/s Faster peak deep queue mixed IO.
74.6 MB/s
ADQ Read
Avg. 4K-64Thread Read Speed
191 MB/s Faster deep queue read.
157 MB/s
ADQ Write
Avg. 4K-64Thread Write Speed
191 MB/s Faster deep queue write.
158 MB/s
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
52.4 MB/s Slightly faster deep queue mixed IO.
46.7 MB/s
256GB 250GB

The 840 Pro is stunning. Samsung have created a completely in-house package including both the controller and their own new 21nm toggle mode NAND. On release (Oct '12) this was the fastest performing deep queue depth consumer grade SSD available. Fast forward six months (Apr '13) and the 840 Pro still holds both the random read/write deep queue depth speed records of 384 MB/s and 326 MB/s, impressive considering how fast the SSD space tends to move. There are no obvious weaknesses, in-fact the 840 pro takes first place in nearly all of the speed categories and is only seriously rivalled by one drive, the OCZ Vector. To conclude, in terms of both outright performance, particularly server orientated, and value for money the 256GB and 128GB 840 Pros are amongst the top handful of drives currently available. [Jun '13 SSDrivePro]


The MX500 is Crucial’s current flagship consumer SATA SSD featuring their latest second generation 64-layer 3D TLC NAND. It’s available in 250 GB, 500 GB, 1 TB and 2 TB capacities in a 2.5-inch form factor. All but the 2 TB version will also be available in M.2 (2280) form in the future. The MX500 features a Silicon Motion SM2258 controller which is a change from the Marvell 88SS1074 controller featured in the MX300 (it’s nearly two year old predecessor). Performance is around 30% better than on the MX300 which currently retails at the same price. The MX500 has an SLC cache which increases with drive capacity. Consequently, the larger capacities are better able to sustain high sequential write speeds. The 250 GB version has 250MB of SLC cache, the 500 GB has 512 MB, the 1 TB has 1 GB and the 2 TB has 2 GB. Extended sustained write performance tests show that even though speed does drop off after the cache has been exhausted, it is still maintained at very respectable levels. The MX500’s five year warranty is in line with Samsung’s 850 Evo and exceeds it in terms of endurance (just 75 TBW for the 250 GB 850 Evo versus 100 TBW for the 250 GB MX500). It doesn’t quite match up to the Samsung’s 850 Evo’s performance (effective speed 8% slower), however at current prices it is about 20% cheaper, and on balance offers better value for money. [Mar '18 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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Intel Core i7-8700K $330Nvidia GTX 1070 $447Samsung 850 Evo 250GB $85
Intel Core i7-7700K $290Nvidia GTX 1060-6GB $335Samsung 850 Evo 500GB $139
AMD Ryzen 5 1600 $189AMD RX 480 $400Samsung 850 Pro 256GB $140
Seagate Barracuda 1TB (2016) $44Corsair Vengeance LPX DDR4 3000 C15 2x8GB $198SanDisk Extreme 64GB $44
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $931SanDisk Extreme 32GB $23
Seagate Barracuda 7200.14 1TB $39Corsair Vengeance LPX DDR4 3200 C16 2x8GB $205SanDisk Extreme 16GB $18
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