CrucialCT256M4SSD2
$218
SanDiskSDSSDXPS-240G
 $218 

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

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

Real World Speed
Performance profile from 25,505 user samples
15,985 User Benchmarks
Best Bench: 73% 100GB free
Worst Bench: 44% 11GB free (System drive)
Poor: 44% Great: 73%
SPEED RANK: 781st / 1058
9,520 User Benchmarks
Best Bench: 112% 56GB free
Worst Bench: 67% 29GB free
Poor: 67% Great: 112%
SPEED RANK: 288th / 1058
Effective Speed
Effective SSD Speed
60.4 % 92.3 % Much faster effective speed.
+53%
Read
Avg. Sequential Read Speed
430 MB/s 462 MB/s Slightly faster read speed.
+7%
Write
Avg. Sequential Write Speed
239 MB/s 410 MB/s Much faster write speed.
+72%
4K Read
Avg. 4K Random Read Speed
20 MB/s 28.9 MB/s Much faster random read.
+44%
4K Write
Avg. 4K Random Write Speed
71.1 MB/s 75 MB/s Slightly faster random write.
+5%
Mixed
Avg. Sequential Mixed IO Speed
250 MB/s 260 MB/s +4%
4K Mixed
Avg. 4K Random Mixed IO Speed
14.4 MB/s 33.7 MB/s Hugely faster random mixed IO.
+134%
SusWrite
Avg. Sustained Write Speed
198 MB/s 361 MB/s Hugely faster sustained write speed.
+82%
Read
Peak Sequential Read Speed
490 MB/s 509 MB/s +4%
Write
Peak Sequential Write Speed
266 MB/s 478 MB/s Much faster peak write speed.
+80%
4K Read
Peak 4K Random Read Speed
23.3 MB/s 35.5 MB/s Much faster peak random read.
+52%
4K Write
Peak 4K Random Write Speed
101 MB/s 110 MB/s Slightly faster peak random write.
+9%
Mixed
Peak Sequential Mixed IO Speed
271 MB/s 310 MB/s Faster peak mixed IO speed.
+14%
4K Mixed
Peak 4K Random Mixed IO Speed
18.8 MB/s 42.1 MB/s Hugely faster peak random mixed IO.
+124%
SusWrite
Peak Sequential Sustained Write 60s Average
266 MB/s 477 MB/s Much faster peak sustained write speed.
+79%
Market Share
Based on 45,257,933 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.02 % Hugely higher market share.
+100%
0.01 %
Value
Value For Money
4.43 % 13.8 % Hugely better value.
+212%
User Rating
UBM User Rating
52 % 54 % +4%
Price
Price (score)
$218 $79 Much cheaper.
+64%
Age
Newest
123 Months 85 Months Much more recent.
+31%
DQ Read
Peak 4K-64Thread Read Speed
184 MB/s 379 MB/s Hugely faster peak deep queue read.
+106%
DQ Write
Peak 4K-64Thread Write Speed
233 MB/s 340 MB/s Much faster peak deep queue write.
+46%
AS-SSD Total
AS-SSD Total Score
746 Pts 1,212 Pts Much stronger server IO.
+63%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
33 MB/s 165 MB/s Hugely faster peak deep queue mixed IO.
+400%
ADQ Read
Avg. 4K-64Thread Read Speed
133 MB/s 317 MB/s Hugely faster deep queue read.
+138%
ADQ Write
Avg. 4K-64Thread Write Speed
136 MB/s 265 MB/s Hugely faster deep queue write.
+95%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
23.8 MB/s 147 MB/s Hugely faster deep queue mixed IO.
+518%
Capacity
Capacity
256GB 240GB
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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

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

Solid State Drive Rankings (Price vs Performance) July 2021 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.
  • - SkillBench (space shooter) tests user input accuracy.
  • - 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.

 Frequently Asked Questions

 Best User Rated

The Best.
CPUGPUSSD
Intel Core i5-11400F $239Nvidia RTX 3060-Ti $400Crucial MX500 250GB $45
Intel Core i5-11600K $270Nvidia RTX 3070 $500Samsung 860 Evo 250GB $52
Intel Core i7-11700K $380Nvidia GTX 1660S (Super) $240Samsung 850 Evo 120GB $78
HDDRAMUSB
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3200 C16 2x8GB $79SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $34Corsair Vengeance LPX DDR4 3000 C15 2x8GB $85SanDisk Extreme 32GB $28
Seagate Barracuda 2TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $649SanDisk Ultra Fit 32GB $16
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