SanDiskSDSSDXPS-240G
CrucialCT250BX100SSD1

Controller: Marvell 88SS9187-BLD2. Flash Memory: SanDisk 19nm eX2 ABL MLC.

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

Real World Speed
Performance profile from 15,886 user samples
3,086 User Benchmarks
Best Bench: 108% 191GB free
Worst Bench: 65% 223GB free
Poor: 65% Great: 108%
SPEED RANK: 150th / 921
12,800 User Benchmarks
Best Bench: 100% 26GB free
Worst Bench: 63% 142GB free
Poor: 63% Great: 100%
SPEED RANK: 192nd / 921
Effective Speed
Effective SSD Speed
87.9 % +5% 83.8 %
Read
Avg. Sequential Read Speed
489 MB/s 500 MB/s +2%
Write
Avg. Sequential Write Speed
433 MB/s Faster write speed.
+22%
356 MB/s
4K Read
Avg. 4K Random Read Speed
28.7 MB/s Faster random read.
+15%
24.9 MB/s
4K Write
Avg. 4K Random Write Speed
77 MB/s 78.4 MB/s +2%
Mixed
Avg. Sequential Mixed IO Speed
429 MB/s +4% 412 MB/s
4K Mixed
Avg. 4K Random Mixed IO Speed
22 MB/s 27.1 MB/s Faster random mixed IO.
+23%
Read
Peak Sequential Read Speed
518 MB/s 524 MB/s +1%
Write
Peak Sequential Write Speed
497 MB/s Much faster peak write speed.
+34%
370 MB/s
4K Read
Peak 4K Random Read Speed
35.6 MB/s Faster peak random read.
+17%
30.3 MB/s
4K Write
Peak 4K Random Write Speed
111 MB/s +1% 110 MB/s
Mixed
Peak Sequential Mixed IO Speed
486 MB/s Slightly faster peak mixed IO speed.
+12%
432 MB/s
4K Mixed
Peak 4K Random Mixed IO Speed
30.1 MB/s 37.8 MB/s Faster peak random mixed IO.
+26%
Market Share
Based on 6,466,514 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.07 % 0.29 % Hugely higher market share.
+314%
Value
Value For Money
78.9 % Better value.
+23%
64.3 %
User Rating
UBM User Rating
64 % +3% 62 %
Price
Price (score)
$105 Cheaper.
+22%
$135
Age
Newest
46 Months 39 Months More recent.
+15%
DQ Read
Peak 4K-64Thread Read Speed
363 MB/s Much faster peak deep queue read.
+32%
275 MB/s
DQ Write
Peak 4K-64Thread Write Speed
318 MB/s +2% 311 MB/s
AS-SSD Total
AS-SSD Total Score
1,171 Pts Stronger server IO.
+17%
1002 Pts
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
65.5 MB/s 72.3 MB/s Slightly faster peak deep queue mixed IO.
+10%
ADQ Read
Avg. 4K-64Thread Read Speed
183 MB/s Faster deep queue read.
+25%
146 MB/s
ADQ Write
Avg. 4K-64Thread Write Speed
203 MB/s +4% 195 MB/s
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
44.2 MB/s 47.7 MB/s Slightly faster deep queue mixed IO.
+8%
Capacity
Capacity
240GB 250GB
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The 240GB Sandisk Extreme Pro uses the same controller and NAND as its 13 months younger predecessor, the Extreme II. Comparing the Extreme II and Extreme Pro shows that average performance has increased by 10% but peak performance remains broadly unchanged. The Pro features an improved nCache which uses an SLC buffer to cache writes prior to writing them to the slower MLC NAND. In order to benefit from this improved caching, huge amounts of data need to be written for extended periods, an unlikely consumer scenario. Comparing core performance between the Samsung 840 Evo and Extreme Pro shows that the Extreme Pro averages around 12% faster than the Evo. The Extreme Pro also has a 10 year warranty but I wonder if SATA 3 will even be around at that time. Although the Extreme Pro has a superb performance profile it's not a game changer. [Jun '14 SSDrivePro]

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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]

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Solid State Drive Rankings (Price vs Performance) April 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]

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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 userbenchmark.com.
  • - 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.
CPUGPUSSD
Intel Core i7-8700K $330Nvidia GTX 1070 $447Samsung 850 Evo 250GB $90
Intel Core i7-7700K $290Nvidia GTX 1060-6GB $290Samsung 850 Evo 500GB $136
AMD Ryzen 5 1600 $176AMD RX 480 $350Samsung 850 Pro 256GB $163
HDDRAMUSB
Seagate Barracuda 1TB (2016) $44Corsair Vengeance LPX DDR4 3000 C15 2x8GB $183SanDisk Extreme 64GB $70
Seagate Barracuda 3TB (2016) $75G.SKILL Trident Z DDR4 3200 C14 4x16GB $957SanDisk Extreme 32GB $46
Seagate Barracuda 2TB (2016) $36Corsair Vengeance LPX DDR4 3200 C16 2x8GB $193SanDisk Ultra Fit 32GB $12
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