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

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

Real World Speed
Performance profile from 24,852 user samples
11,928 User Benchmarks
Best Bench: 100% 95GB free
Worst Bench: 65% 142GB free
Poor: 65% Great: 100%
SPEED RANK: 156th / 908
12,924 User Benchmarks
Best Bench: 81% 171GB free
Worst Bench: 47% 186GB free
Poor: 47% Great: 81%
SPEED RANK: 477th / 908
Effective Speed
Effective SSD Speed
84.7 % Much faster effective speed.
63.8 %
Avg. Sequential Read Speed
502 MB/s Slightly faster read speed.
453 MB/s
Avg. Sequential Write Speed
356 MB/s Much faster write speed.
236 MB/s
4K Read
Avg. 4K Random Read Speed
25 MB/s 27 MB/s Slightly faster random read.
4K Write
Avg. 4K Random Write Speed
78.5 MB/s Much faster random write.
48.2 MB/s
Avg. Sequential Mixed IO Speed
413 MB/s Much faster mixed IO speed.
235 MB/s
4K Mixed
Avg. 4K Random Mixed IO Speed
27.6 MB/s Hugely faster random mixed IO.
14.2 MB/s
Peak Sequential Read Speed
524 MB/s Slightly faster peak read speed.
498 MB/s
Peak Sequential Write Speed
370 MB/s Slightly faster peak write speed.
339 MB/s
4K Read
Peak 4K Random Read Speed
30.4 MB/s 36.8 MB/s Faster peak random read.
4K Write
Peak 4K Random Write Speed
108 MB/s Much faster peak random write.
77.5 MB/s
Peak Sequential Mixed IO Speed
431 MB/s Much faster peak mixed IO speed.
330 MB/s
4K Mixed
Peak 4K Random Mixed IO Speed
37.8 MB/s Much faster peak random mixed IO.
21 MB/s
Market Share
Based on 6,034,146 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.18 % 0.42 % Hugely higher market share.
Value For Money
75.3 % +2% 73.7 %
User Rating
UBM User Rating
62 % 64 % +3%
Price (score)
$111 $75 Much cheaper.
38 Months Slightly more recent.
42 Months
DQ Read
Peak 4K-64Thread Read Speed
277 MB/s 346 MB/s Faster peak deep queue read.
DQ Write
Peak 4K-64Thread Write Speed
311 MB/s Much faster peak deep queue write.
205 MB/s
AS-SSD Total
AS-SSD Total Score
1,003 Pts +3% 976 Pts
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
72.3 MB/s Much faster peak deep queue mixed IO.
51.4 MB/s
ADQ Read
Avg. 4K-64Thread Read Speed
158 MB/s 170 MB/s Slightly faster deep queue read.
ADQ Write
Avg. 4K-64Thread Write Speed
203 MB/s Much faster deep queue write.
128 MB/s
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
47.8 MB/s Much faster deep queue mixed IO.
30.4 MB/s
250GB 240GB

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]


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]


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 $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 2TB (2016) $60Corsair Vengeance LPX DDR4 3200 C16 2x8GB $205SanDisk Extreme 16GB $18
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