Controller: Marvell 88SS9189. Flash Memory: Micron 16nm MLC.


Controller: Marvell 88SS9189. Flash Memory: Micron Synchronous 20nm MLC.

Real World Speed
Performance profile from 22,600 user samples
18,885 User Benchmarks
Best Bench: 95% 59GB free
Worst Bench: 61% 184GB free
Poor: 61% Great: 95%
SPEED RANK: 214th / 908
3,715 User Benchmarks
Best Bench: 110% 143GB free
Worst Bench: 63% 88GB free
Poor: 63% Great: 110%
SPEED RANK: 102nd / 908
Effective Speed
Effective SSD Speed
80.7 % 91.1 % Slightly faster effective speed.
Avg. Sequential Read Speed
496 MB/s +1% 493 MB/s
Avg. Sequential Write Speed
321 MB/s 450 MB/s Much faster write speed.
4K Read
Avg. 4K Random Read Speed
25.5 MB/s 26.1 MB/s +2%
4K Write
Avg. 4K Random Write Speed
82.4 MB/s 83.1 MB/s +1%
Avg. Sequential Mixed IO Speed
370 MB/s 444 MB/s Faster mixed IO speed.
4K Mixed
Avg. 4K Random Mixed IO Speed
24.8 MB/s 26.8 MB/s Slightly faster random mixed IO.
Peak Sequential Read Speed
522 MB/s 525 MB/s +1%
Peak Sequential Write Speed
331 MB/s 482 MB/s Much faster peak write speed.
4K Read
Peak 4K Random Read Speed
30.9 MB/s 32.1 MB/s +4%
4K Write
Peak 4K Random Write Speed
115 MB/s 123 MB/s Slightly faster peak random write.
Peak Sequential Mixed IO Speed
397 MB/s 492 MB/s Faster peak mixed IO speed.
4K Mixed
Peak 4K Random Mixed IO Speed
33.4 MB/s 37.1 MB/s Slightly faster peak random mixed IO.
Market Share
Based on 6,044,896 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.37 % Hugely higher market share.
0.05 %
Value For Money
70.6 % Slightly better value.
65 %
User Rating
UBM User Rating
64 % More popular.
55 %
Price (score)
$116 Cheaper.
45 Months Slightly more recent.
48 Months
DQ Read
Peak 4K-64Thread Read Speed
215 MB/s 358 MB/s Much faster peak deep queue read.
DQ Write
Peak 4K-64Thread Write Speed
301 MB/s 326 MB/s Slightly faster peak deep queue write.
AS-SSD Total
AS-SSD Total Score
902 Pts 1175 Pts Much stronger server IO.
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
52.6 MB/s 76.3 MB/s Much faster peak deep queue mixed IO.
ADQ Read
Avg. 4K-64Thread Read Speed
122 MB/s 182 MB/s Much faster deep queue read.
ADQ Write
Avg. 4K-64Thread Write Speed
197 MB/s 198 MB/s +1%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
36 MB/s 47.9 MB/s Much faster deep queue mixed IO.
256GB 256GB

The Crucial MX100 is the first 16nm SSD to date. Aside from NAND, the MX100 shares the same hardware as its more expensive sibling, the M550. Comparing the MX100 and M550 shows that the two drives have similar read speeds but that the MX100 lags by nearly 50% at writing. The newer 16nm NAND reduces costs and accordingly the MX100 is the cheapest SSD (per GB) to date. In terms of performance the MX100 is a compromise which may or may not be worth making depending on individual circumstances. For typical desktop use including email, office documents and web browsing the MX100 is a great choice but power users should look elsewhere. Comparing the 250GB 840 EVO and 256GB MX100 shows that for a marginal premium, the Evo offers better write speeds. (Note: at 500GB they are more evenly matched) [Jun '14 SSDrivePro]


The 256GB Crucial M550 is a welcome improvement over the 240GB M500. The new Marvel 88SS9189 controller has addressed our primary concern with the M500 which was poor sequential write speed. With sequential read/write speeds of 510/478 MB/s the M550 has a healthy core performance profile. Comparing the M550 and M500 shows that the new M550 leads on nearly every single performance metric. Unfortunately the M550 is priced significantly higher than the M500 but prices will likely drop as retailers build up stocks of the new M550. A key comparable for the M550 is the similarly priced market leading Samsung Evo. Comparing the Evo and M550 shows that the Evo is around 11% slower in terms of effective speed[Mar '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 $150
Intel Core i5-8600K $243AMD RX 480 $400Samsung 850 Pro 256GB $120
Seagate Barracuda 1TB (2016) $44Corsair Vengeance LPX DDR4 3000 C15 2x8GB $190SanDisk Extreme 64GB $44
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $931SanDisk Extreme 32GB $23
Seagate Barracuda 2TB (2016) $60Corsair Vengeance LPX DDR4 3200 C16 2x8GB $212SanDisk Extreme 16GB $18
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