Controller: Samsung Dual Core MGX. Memory: Samsung 40nm TLC V-NAND

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

Real World Speed
Performance profile from 250,012 user samples
239,298 User Benchmarks
Best Bench: 115% 176GB free
Worst Bench: 70% 196GB free
Poor: 70% Great: 115%
SPEED RANK: 66th / 873
10,714 User Benchmarks
Best Bench: 100% 61GB free
Worst Bench: 63% 22GB free
Poor: 63% Great: 100%
SPEED RANK: 143rd / 873
Effective Speed
Effective SSD Speed
94.9 % Slightly faster effective speed.
84.3 % -13%
Avg. Sequential Read Speed
495 MB/s -1% 502 MB/s +1%
Avg. Sequential Write Speed
392 MB/s Slightly faster write speed.
355 MB/s -10%
4K Read
Avg. 4K Random Read Speed
38 MB/s Much faster random read.
25 MB/s -52%
4K Write
Avg. 4K Random Write Speed
76.7 MB/s -3% 78.8 MB/s +3%
Avg. Sequential Mixed IO Speed
399 MB/s -3% 411 MB/s +3%
4K Mixed
Avg. 4K Random Mixed IO Speed
33.5 MB/s Faster random mixed IO.
26.9 MB/s -25%
Peak Sequential Read Speed
516 MB/s -2% 524 MB/s +2%
Peak Sequential Write Speed
417 MB/s Slightly faster peak write speed.
371 MB/s -12%
4K Read
Peak 4K Random Read Speed
46.9 MB/s Much faster peak random read.
30.6 MB/s -53%
4K Write
Peak 4K Random Write Speed
104 MB/s -8% 112 MB/s Slightly faster peak random write.
Peak Sequential Mixed IO Speed
422 MB/s -2% 432 MB/s +2%
4K Mixed
Peak 4K Random Mixed IO Speed
47.6 MB/s Faster peak random mixed IO.
37.6 MB/s -27%
Market Share
Based on 5,230,364 SSDs tested.
Market Share
Market Share (trailing 30 days)
8.41 % Insanely higher market share.
0.31 % -2,613%
Value For Money
98.7 % Much better value.
62.9 % -57%
User Rating
UBM User Rating
126 % Hugely more popular.
62 % -103%
Price (score)
$90 Much cheaper.
$140 -36%
37 Months -3% 36 Months +3%
DQ Read
Peak 4K-64Thread Read Speed
370 MB/s Much faster peak deep queue read.
277 MB/s -34%
DQ Write
Peak 4K-64Thread Write Speed
282 MB/s -10% 311 MB/s Slightly faster peak deep queue write.
AS-SSD Total
AS-SSD Total Score
1,149 Pts Slightly stronger server IO.
1,008 Pts -14%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
123 MB/s Much faster peak deep queue mixed IO.
72.4 MB/s -70%
ADQ Read
Avg. 4K-64Thread Read Speed
195 MB/s Faster deep queue read.
157 MB/s -24%
ADQ Write
Avg. 4K-64Thread Write Speed
188 MB/s -8% 203 MB/s Slightly faster deep queue write.
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
69 MB/s Much faster deep queue mixed IO.
46.8 MB/s -47%
250GB 250GB

The 250GB Samsung 850 Evo has a similar architecture to its hugely successful predecessor, the 840 Evo. Both drives are TLC based but the 850 uses 3D V-NAND as opposed to regular NAND. Both drives also feature a Turbowrite cache (TWC) which buffers up to 3GB of writes. The TWC enables high burst write speeds but when the cache exhausts write speeds drop to 300 MB/s. Comparing the 850 and 840 Evos shows that effective speed, has improved by 11% and the warranty has been extended from three to five years but prices are also up by 11%. The 850 Evo does put in superb benchmarks (second only to the 850 Pro) but these are only valid within the TWC. At current price levels the 850 Evo struggles to compete with the value leaders[Dec '14 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) January 2018 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

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Intel Core i7-7700K $280Nvidia GTX 1070 $430Samsung 850 Evo 250GB $90
AMD Ryzen 7 1700 $290Nvidia GTX 1060-6GB $275Samsung 850 Evo 500GB $140
Intel Core i5-7600K $210AMD RX 480 $400Samsung 850 Pro 256GB $110
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $205SanDisk Extreme 64GB $65
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $931SanDisk Extreme 32GB $22
Seagate Barracuda 7200.14 1TB $51Corsair Vengeance LPX DDR4 3200 C16 2x8GB $220SanDisk Ultra Fit 32GB $12
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