Controller: Marvell 88SS9187. Memory: SanDisk 19nm TLC.

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

Real World Speed
Performance profile from 12,697 user samples
12,130 User Benchmarks
Best Bench: 82% 104GB free
Worst Bench: 47% 165GB free
Poor: 47% Great: 82%
SPEED RANK: 466th / 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
64.4 % 86.2 % Much faster effective speed.
Avg. Sequential Read Speed
452 MB/s 502 MB/s Slightly faster read speed.
Avg. Sequential Write Speed
238 MB/s 374 MB/s Much faster write speed.
4K Read
Avg. 4K Random Read Speed
27.2 MB/s 31 MB/s Slightly faster random read.
4K Write
Avg. 4K Random Write Speed
49.2 MB/s 68 MB/s Much faster random write.
Avg. Sequential Mixed IO Speed
236 MB/s 401 MB/s Much faster mixed IO speed.
4K Mixed
Avg. 4K Random Mixed IO Speed
14.5 MB/s 28.7 MB/s Hugely faster random mixed IO.
Peak Sequential Read Speed
499 MB/s 527 MB/s Slightly faster peak read speed.
Peak Sequential Write Speed
339 MB/s 398 MB/s Faster peak write speed.
4K Read
Peak 4K Random Read Speed
36.9 MB/s 40 MB/s Slightly faster peak random read.
4K Write
Peak 4K Random Write Speed
77.5 MB/s 94.9 MB/s Faster peak random write.
Peak Sequential Mixed IO Speed
331 MB/s 422 MB/s Faster peak mixed IO speed.
4K Mixed
Peak 4K Random Mixed IO Speed
21 MB/s 41.7 MB/s Hugely faster peak random mixed IO.
Market Share
Based on 5,993,412 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.48 % Much higher market share.
0.27 %
Value For Money
74.4 % 97.8 % Much better value.
User Rating
UBM User Rating
64 % 67 % +5%
Price (score)
$75 Slightly cheaper.
42 Months 3 Months Hugely more recent.
DQ Read
Peak 4K-64Thread Read Speed
349 MB/s 355 MB/s +2%
DQ Write
Peak 4K-64Thread Write Speed
207 MB/s 273 MB/s Much faster peak deep queue write.
AS-SSD Total
AS-SSD Total Score
983 Pts 1,093 Pts Slightly stronger server IO.
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
51.5 MB/s 74.6 MB/s Much faster peak deep queue mixed IO.
ADQ Read
Avg. 4K-64Thread Read Speed
173 MB/s Slightly faster deep queue read.
157 MB/s
ADQ Write
Avg. 4K-64Thread Write Speed
131 MB/s 158 MB/s Faster deep queue write.
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
30.7 MB/s 46.7 MB/s Much faster deep queue mixed IO.
240GB 250GB

The Sandisk Ultra II sits above Sandisk's Ultra Plus and below their Extreme Pro. The Ultra Plus would probably have been phased out completely were it not for its continued success within budget space. The Ultra II is the first Sandisk drive to utilize cheaper (and slower) TLC NAND. Similarly to the Extreme Pro, the Ultra II utilizes an nCache which operates a portion of the NAND in simulated SLC mode. This strategy also matches the one employed by Samsung's now 14 months old Evo. Comparing the Ultra II and Evo shows broad performance equivalence which given the Ultra II's 15% price discount makes it the better choice today. That said it's probably worth waiting for the release of the 850 Evo which will pack another 14 months of Samsung's market leading R&D and will probably steal the show. [Sep '14 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

 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 $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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