SanDiskSDSSDXPS-240G
CrucialCT256M4SSD2
$218

Controller: Marvell 88SS9187-BLD2. Flash Memory: SanDisk 19nm eX2 ABL MLC. Release date: Q2 2014.

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 $218 

Controller: Marvell 88SS9174-BLD2. Flash Memory: Micron Synchronous 25nm MLC. Release date: Q2 2011.

Real World Speed
Performance profile from 15,341 user samples
5,389 User Benchmarks
Best Bench: 113% 171GB free
Worst Bench: 63% 141GB free
Poor: 63% Great: 113%
SPEED RANK: 262nd / 1011
9,952 User Benchmarks
Best Bench: 75% 146GB free
Worst Bench: 44% 41GB free (System drive)
Poor: 44% Great: 75%
SPEED RANK: 719th / 1011
Effective Speed
Effective SSD Speed
90.9 % Much faster effective speed.
+49%
61 %
Read
Avg. Sequential Read Speed
452 MB/s +5% 431 MB/s
Write
Avg. Sequential Write Speed
408 MB/s Much faster write speed.
+69%
241 MB/s
4K Read
Avg. 4K Random Read Speed
28 MB/s Much faster random read.
+40%
20 MB/s
4K Write
Avg. 4K Random Write Speed
72.8 MB/s 74.9 MB/s +3%
Mixed
Avg. Sequential Mixed IO Speed
257 MB/s +3% 249 MB/s
4K Mixed
Avg. 4K Random Mixed IO Speed
32.9 MB/s Hugely faster random mixed IO.
+125%
14.6 MB/s
SusWrite
Avg. Sustained Write Speed
364 MB/s Hugely faster sustained write speed.
+83%
199 MB/s
Read
Peak Sequential Read Speed
508 MB/s +3% 492 MB/s
Write
Peak Sequential Write Speed
480 MB/s Much faster peak write speed.
+80%
267 MB/s
4K Read
Peak 4K Random Read Speed
36.1 MB/s Much faster peak random read.
+54%
23.5 MB/s
4K Write
Peak 4K Random Write Speed
113 MB/s Slightly faster peak random write.
+7%
106 MB/s
Mixed
Peak Sequential Mixed IO Speed
317 MB/s Faster peak mixed IO speed.
+16%
274 MB/s
4K Mixed
Peak 4K Random Mixed IO Speed
43 MB/s Hugely faster peak random mixed IO.
+122%
19.4 MB/s
SusWrite
Peak Sequential Sustained Write 60s Average
470 MB/s Much faster peak sustained write speed.
+78%
264 MB/s
Market Share
Based on 18,503,312 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.05 % 0.05 %
Value
Value For Money
13.6 % Hugely better value.
+203%
4.48 %
User Rating
UBM User Rating
64 % Slightly more popular.
+14%
56 %
Price
Price (score)
$79 Much cheaper.
+64%
$218
Age
Newest
64 Months Much more recent.
+37%
102 Months
DQ Read
Peak 4K-64Thread Read Speed
376 MB/s Hugely faster peak deep queue read.
+104%
184 MB/s
DQ Write
Peak 4K-64Thread Write Speed
337 MB/s Much faster peak deep queue write.
+42%
237 MB/s
AS-SSD Total
AS-SSD Total Score
1209 Pts Much stronger server IO.
+60%
755 Pts
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
165 MB/s Hugely faster peak deep queue mixed IO.
+400%
33 MB/s
ADQ Read
Avg. 4K-64Thread Read Speed
315 MB/s Hugely faster deep queue read.
+146%
128 MB/s
ADQ Write
Avg. 4K-64Thread Write Speed
262 MB/s Hugely faster deep queue write.
+93%
136 MB/s
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
148 MB/s Hugely faster deep queue mixed IO.
+524%
23.7 MB/s
Capacity
Capacity
240GB 256GB
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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]

MORE DETAILS

The Crucial M4 is one of the oldest SSD's to have made it into the group test. When it was released its primary competitors were Sandforce based drives which suffered from two major problems: reliability and weak incompressible data performance. As a result this drive was one of the top drives of its time. That was back in Apr '11. Today the M4 is no longer able to compete and scores below average (377.9 MB/s) on the Real World Speed Index benchmark and way below average (676) on the deep queue depth orientated AS-SSD Total score benchmark. Of course these figures are still far faster than any mechanical hard drive and owners of this drive should feel in no hurry to upgrade. People looking to make a new purchase will find much better value elsewhere. [Apr '13 SSDrivePro]

MORE DETAILS

Solid State Drive Rankings (Price vs Performance) October 2019 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 - User sentiment trumps benchmarks for this comparison.
  • Best value for money - Value for money is based on real world performance.
  • Fastest real world speed - Real World Speed measures performance for typical consumers.
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.
  • - CPU tests include: integer, floating and string.
  • - GPU tests include: six 3D game simulations.
  • - Drive tests include: read, write, sustained write and mixed IO.
  • - 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 current market leaders.
  • - Explore your best upgrade options with a virtual PC build.
  • - Compare your in-game FPS to other users with your hardware.
  • - Share your opinion by voting.

 Frequently Asked Questions

 Best User Rated

The Best.
CPUGPUSSD
Intel Core i5-9400F $145Nvidia GTX 1660 $210Samsung 850 Evo 250GB $73
Intel Core i5-9600K $240Nvidia RTX 2060 $349Samsung 850 Evo 500GB $107
Intel Core i7-9700K $350Nvidia GTX 1660-Ti $270Samsung 850 Pro 256GB $200
HDDRAMUSB
Seagate Barracuda 1TB (2016) $40Corsair Vengeance LPX DDR4 3000 C15 2x8GB $65SanDisk Extreme 64GB $88
Seagate Barracuda 3TB (2016) $78G.SKILL Trident Z DDR4 3200 C14 4x16GB $612SanDisk Extreme 32GB $48
WD Blue 1TB (2012) $37Corsair Vengeance LPX DDR4 3200 C16 2x8GB $70SanDisk Ultra Fit 32GB $14
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