CrucialCT256M4SSD2
$218
SamsungMZ-7PD256BW
 $218 

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

Controller: Samsung 3-core MDX. Flash Memory: Samsung 21nm Toggle Mode MLC. Release date: Q4 2012.

Real World Speed
Performance profile from 82,559 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
66,574 User Benchmarks
Best Bench: 115% 144GB free
Worst Bench: 64% 82GB free (System drive)
Poor: 64% Great: 115%
SPEED RANK: 277th / 1058
Effective Speed
Effective SSD Speed
60.4 % 93.3 % Much faster effective speed.
+55%
Read
Avg. Sequential Read Speed
430 MB/s 461 MB/s Slightly faster read speed.
+7%
Write
Avg. Sequential Write Speed
239 MB/s 367 MB/s Much faster write speed.
+54%
4K Read
Avg. 4K Random Read Speed
20 MB/s 30.8 MB/s Much faster random read.
+54%
4K Write
Avg. 4K Random Write Speed
71.1 MB/s 81.3 MB/s Faster random write.
+14%
Mixed
Avg. Sequential Mixed IO Speed
250 MB/s 299 MB/s Faster mixed IO speed.
+20%
4K Mixed
Avg. 4K Random Mixed IO Speed
14.4 MB/s 38.7 MB/s Hugely faster random mixed IO.
+169%
SusWrite
Avg. Sustained Write Speed
198 MB/s 312 MB/s Much faster sustained write speed.
+58%
Read
Peak Sequential Read Speed
490 MB/s 509 MB/s +4%
Write
Peak Sequential Write Speed
266 MB/s 482 MB/s Hugely faster peak write speed.
+81%
4K Read
Peak 4K Random Read Speed
23.3 MB/s 36.1 MB/s Much faster peak random read.
+55%
4K Write
Peak 4K Random Write Speed
101 MB/s 113 MB/s Faster peak random write.
+12%
Mixed
Peak Sequential Mixed IO Speed
271 MB/s 359 MB/s Much faster peak mixed IO speed.
+32%
4K Mixed
Peak 4K Random Mixed IO Speed
18.8 MB/s 47.3 MB/s Hugely faster peak random mixed IO.
+152%
SusWrite
Peak Sequential Sustained Write 60s Average
266 MB/s 476 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 % 0.1 % Hugely higher market share.
+400%
Value
Value For Money
4.43 % 7.06 % Much better value.
+59%
User Rating
UBM User Rating
52 % 54 % +4%
Price
Price (score)
$218 $209 +4%
Age
Newest
123 Months 105 Months More recent.
+15%
DQ Read
Peak 4K-64Thread Read Speed
184 MB/s 385 MB/s Hugely faster peak deep queue read.
+109%
DQ Write
Peak 4K-64Thread Write Speed
233 MB/s 333 MB/s Much faster peak deep queue write.
+43%
AS-SSD Total
AS-SSD Total Score
746 Pts 1,219 Pts Much stronger server IO.
+64%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
33 MB/s 175 MB/s Hugely faster peak deep queue mixed IO.
+430%
ADQ Read
Avg. 4K-64Thread Read Speed
133 MB/s 333 MB/s Hugely faster deep queue read.
+150%
ADQ Write
Avg. 4K-64Thread Write Speed
136 MB/s 248 MB/s Hugely faster deep queue write.
+82%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
23.8 MB/s 141 MB/s Hugely faster deep queue mixed IO.
+492%
Capacity
Capacity
256GB 256GB
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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 840 Pro is stunning. Samsung have created a completely in-house package including both the controller and their own new 21nm toggle mode NAND. On release (Oct '12) this was the fastest performing deep queue depth consumer grade SSD available. Fast forward six months (Apr '13) and the 840 Pro still holds both the random read/write deep queue depth speed records of 384 MB/s and 326 MB/s, impressive considering how fast the SSD space tends to move. There are no obvious weaknesses, in-fact the 840 pro takes first place in nearly all of the speed categories and is only seriously rivalled by one drive, the OCZ Vector. To conclude, in terms of both outright performance, particularly server orientated, and value for money the 256GB and 128GB 840 Pros are amongst the top handful of drives currently available. [Jun '13 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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