Controller: Samsung Triple Core MEX. Memory: Samsung 40nm MLC V-NAND

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

Real World Speed
Performance profile from 41,910 user samples
31,196 User Benchmarks
Best Bench: 121% 179GB free
Worst Bench: 70% 96GB free
Poor: 70% Great: 121%
SPEED RANK: 60th / 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
99.7 % Faster effective speed.
84.3 % -18%
Avg. Sequential Read Speed
505 MB/s +1% 502 MB/s -1%
Avg. Sequential Write Speed
439 MB/s Faster write speed.
355 MB/s -24%
4K Read
Avg. 4K Random Read Speed
32.5 MB/s Much faster random read.
25 MB/s -30%
4K Write
Avg. 4K Random Write Speed
88.3 MB/s Slightly faster random write.
78.8 MB/s -12%
Avg. Sequential Mixed IO Speed
459 MB/s Slightly faster mixed IO speed.
411 MB/s -12%
4K Mixed
Avg. 4K Random Mixed IO Speed
35.2 MB/s Much faster random mixed IO.
26.9 MB/s -31%
Peak Sequential Read Speed
528 MB/s +1% 524 MB/s -1%
Peak Sequential Write Speed
502 MB/s Much faster peak write speed.
371 MB/s -35%
4K Read
Peak 4K Random Read Speed
42.5 MB/s Much faster peak random read.
30.6 MB/s -39%
4K Write
Peak 4K Random Write Speed
123 MB/s Slightly faster peak random write.
112 MB/s -10%
Peak Sequential Mixed IO Speed
514 MB/s Faster peak mixed IO speed.
432 MB/s -19%
4K Mixed
Peak 4K Random Mixed IO Speed
51.3 MB/s Much faster peak random mixed IO.
37.6 MB/s -36%
Market Share
Based on 5,230,364 SSDs tested.
Market Share
Market Share (trailing 30 days)
1.16 % Hugely higher market share.
0.31 % -274%
Value For Money
90.8 % Much better value.
62.9 % -44%
User Rating
UBM User Rating
99 % Much more popular.
62 % -60%
Price (score)
$110 Cheaper.
$140 -21%
42 Months -14% 36 Months Slightly more recent.
DQ Read
Peak 4K-64Thread Read Speed
378 MB/s Much faster peak deep queue read.
277 MB/s -36%
DQ Write
Peak 4K-64Thread Write Speed
341 MB/s Slightly faster peak deep queue write.
311 MB/s -10%
AS-SSD Total
AS-SSD Total Score
1,244 Pts Stronger server IO.
1,008 Pts -23%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
162 MB/s Hugely faster peak deep queue mixed IO.
72.4 MB/s -124%
ADQ Read
Avg. 4K-64Thread Read Speed
215 MB/s Much faster deep queue read.
157 MB/s -37%
ADQ Write
Avg. 4K-64Thread Write Speed
225 MB/s Slightly faster deep queue write.
203 MB/s -11%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
91.3 MB/s Hugely faster deep queue mixed IO.
46.8 MB/s -95%
256GB 250GB

The 256GB Samsung 850 Pro is the fastest consumer SSD we have seen to date. Thanks to Samsung's new 3D V-NAND the 850 Pro has lower power consumption and better performance, albeit marginally, than both the 840 Evo and 840 Pro. Looking at the benchmark figures for the 840 and 850 Pros shows that the effective performance improvement is 10% whereas the 850 Pro beats the 840 Evo by 16%. These drives effectively saturate SATA 3.0 making it difficult to distinguish between them in day-to-day use. At current prices the 850 Pro is prohibitively expensive, prices need to drop by 15% before it approaches the 840 Pro from a value perspective. Samsung may release a value orientated 850 Evo soon, but for now "most" users are better off with the 840 Pro. [Oct '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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The Best.
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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