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

Controller: Silicon Motion SM2246EN. Flash Memory: Micron 16nm MLC.

Real World Speed
Performance profile from 12,537 user samples
609 User Benchmarks
Best Bench: 104% 153GB free
Worst Bench: 62% 20GB free
Poor: 62% Great: 104%
SPEED RANK: 149th / 908
11,928 User Benchmarks
Best Bench: 100% 95GB free
Worst Bench: 65% 142GB free
Poor: 65% Great: 100%
SPEED RANK: 156th / 908
Effective Speed
Effective SSD Speed
85.6 % +1% 84.7 %
Avg. Sequential Read Speed
502 MB/s 502 MB/s
Avg. Sequential Write Speed
374 MB/s Slightly faster write speed.
356 MB/s
4K Read
Avg. 4K Random Read Speed
30.8 MB/s Faster random read.
25 MB/s
4K Write
Avg. 4K Random Write Speed
66.8 MB/s 78.5 MB/s Faster random write.
Avg. Sequential Mixed IO Speed
401 MB/s 413 MB/s +3%
4K Mixed
Avg. 4K Random Mixed IO Speed
28.3 MB/s +3% 27.6 MB/s
Peak Sequential Read Speed
527 MB/s +1% 524 MB/s
Peak Sequential Write Speed
398 MB/s Slightly faster peak write speed.
370 MB/s
4K Read
Peak 4K Random Read Speed
39.7 MB/s Much faster peak random read.
30.4 MB/s
4K Write
Peak 4K Random Write Speed
94.5 MB/s 108 MB/s Slightly faster peak random write.
Peak Sequential Mixed IO Speed
422 MB/s 431 MB/s +2%
4K Mixed
Peak 4K Random Mixed IO Speed
41.5 MB/s Slightly faster peak random mixed IO.
37.8 MB/s
Market Share
Based on 6,032,923 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.37 % Hugely higher market share.
0.19 %
Value For Money
97.2 % Better value.
75.3 %
User Rating
UBM User Rating
67 % Slightly more popular.
62 %
Price (score)
$80 Cheaper.
3 Months Hugely more recent.
38 Months
DQ Read
Peak 4K-64Thread Read Speed
355 MB/s Faster peak deep queue read.
277 MB/s
DQ Write
Peak 4K-64Thread Write Speed
274 MB/s 311 MB/s Slightly faster peak deep queue write.
AS-SSD Total
AS-SSD Total Score
1,093 Pts Slightly stronger server IO.
1,003 Pts
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
74.5 MB/s +3% 72.3 MB/s
ADQ Read
Avg. 4K-64Thread Read Speed
154 MB/s 158 MB/s +3%
ADQ Write
Avg. 4K-64Thread Write Speed
157 MB/s 203 MB/s Faster deep queue write.
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
45.5 MB/s 47.8 MB/s Slightly faster deep queue mixed IO.
250GB 250GB

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]


The 250GB Crucial BX100 SSD is the value orientated variant of Crucial's M range of SSDs. The BX100 uses the same NAND as its premium MX200 sibling but the BX100 uses a Silicon Motion controller as opposed to the Marvel controller found in the MX range. Feature wise the BX100 is missing SLC caching and there is no hardware encryption (so security frameworks such as windows Bitlocker will operate less efficiently). In terms of I/O performance the BX100 looks promising. Comparing the BX100 and MX100 shows that the newer BX100 may be faster than its predecessor but as yet there are insufficient user benchmarks to draw any definitive conclusions. The BX100 has only just started hitting the shelves so there's plenty of room for price reductions from its already reasonable price tag. I will revisit this review when I have more performance data for the BX100. [Jan '15 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 $117Samsung 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 7200.14 1TB $51Corsair Vengeance LPX DDR4 3200 C16 2x8GB $205SanDisk Extreme 16GB $18
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