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CrucialCT256M4SSD2
$218
CrucialCT064M4SSD2
▲ 521,868 ▼
 $218 

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

VS
▲ 503 ▼

Controller: Marvell 88SS9174-BLD2. Flash Memory: Micron Synchronous 25nm MLC. Release date ≤ Q4 2013.

Effective Speed 
+11%
Real World Speed
Performance profile from 25,274 user samples
Benchmark your SSD here
17,938 User Benchmarks
Best Bench: 74% 168GB free
Worst Bench: 43% 72GB free (System drive)
Poor: 43% Great: 74%
SPEED RANK: 804th / 1080
7,336 User Benchmarks
Best Bench: 65% 59GB free
Worst Bench: 40% 23GB free (System drive)
Poor: 40% Great: 65%
SPEED RANK: 865th / 1080
Effective Speed
Effective SSD Speed 		60.8 % Faster effective speed.
+11% 		54.5 %
Average Score 
+43%
Read
Avg. Sequential Read Speed 		432 MB/s 444 MB/s +3%
Write
Avg. Sequential Write Speed 		240 MB/s Hugely faster write speed.
+129% 		105 MB/s
4K Read
Avg. 4K Random Read Speed 		19.9 MB/s 24.1 MB/s Faster random read.
+21%
4K Write
Avg. 4K Random Write Speed 		74.1 MB/s Faster random write.
+19% 		62.2 MB/s
Mixed
Avg. Sequential Mixed IO Speed 		250 MB/s Much faster mixed IO speed.
+64% 		152 MB/s
4K Mixed
Avg. 4K Random Mixed IO Speed 		14.6 MB/s 14.7 MB/s +1%
SusWrite
Avg. Sustained Write Speed 		195 MB/s Hugely faster sustained write speed.
+114% 		91.1 MB/s
Peak Score 
+51%
Read
Peak Sequential Read Speed 		494 MB/s 500 MB/s +1%
Write
Peak Sequential Write Speed 		268 MB/s Hugely faster peak write speed.
+141% 		111 MB/s
4K Read
Peak 4K Random Read Speed 		23.4 MB/s 28.8 MB/s Faster peak random read.
+23%
4K Write
Peak 4K Random Write Speed 		106 MB/s Faster peak random write.
+27% 		83.2 MB/s
Mixed
Peak Sequential Mixed IO Speed 		273 MB/s Much faster peak mixed IO speed.
+62% 		168 MB/s
4K Mixed
Peak 4K Random Mixed IO Speed 		18.9 MB/s Slightly faster peak random mixed IO.
+6% 		17.8 MB/s
SusWrite
Peak Sequential Sustained Write 60s Average 		265 MB/s Hugely faster peak sustained write speed.
+143% 		109 MB/s
Value & Sentiment 
+∞%
Market Share
Based on 77,533,683 SSDs tested
See market share leaders
Market Share
Market Share (trailing 30 days) 		0.03 % Insanely higher market share.
+∞% 		0 %
Value
Value For Money 		4.46 % Much better value.
+65% 		2.7 %
User Rating
UBM User Rating 		52 % +4% 50 %
Price
Price (score) 		$218 $92 Much cheaper.
+58%
Nice To Haves 
+0%
Age
Newest 		163 Months 131+ Months More recent.
+20%
DQ Read
Peak 4K-64Thread Read Speed 		184 MB/s 285 MB/s Much faster peak deep queue read.
+55%
DQ Write
Peak 4K-64Thread Write Speed 		234 MB/s Hugely faster peak deep queue write.
+117% 		108 MB/s
AS-SSD Total
AS-SSD Total Score 		752 Pts +1% 743 Pts
DQ Mixed
Peak 4K-64Thread Mixed IO Speed 		33.1 MB/s 42.5 MB/s Faster peak deep queue mixed IO.
+28%
ADQ Read
Avg. 4K-64Thread Read Speed 		133 MB/s 165 MB/s Faster deep queue read.
+24%
ADQ Write
Avg. 4K-64Thread Write Speed 		136 MB/s Much faster deep queue write.
+51% 		89.8 MB/s
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed 		23.7 MB/s 33.5 MB/s Much faster deep queue mixed IO.
+41%
Specifications 
Capacity
Capacity 		256GB 64GB
Conclusion 
Average Bench 60.8%
Average Bench 54.5%

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]

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Welcome to our 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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 Frequently Asked Questions

Storage Devices FAQ
What is sustained sequential write speed?
What’s the difference between SLC, MLC and TLC?
What is 3D XPoint and how fast is it?
What’s the difference between SATA, PCIe and NVMe?
What’s the difference between NAND and V-NAND?
What is sequential write speed?
What is sequential read speed?
What is incompressible data?
What is queue depth?
Solid State Drives
What is the SSD value for money rating?
What is 4K 64 thread write speed?
Can CPU power saving states (C1,C2,C3) impact SSD speed?
What is the effective SSD speed index?
How is the AS SSD write score calculated?
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How is the AS SSD total score calculated?
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The Best
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Intel Core i5-13600K $210Nvidia RTX 4060-Ti $389WD Black SN850X M.2 1TB $84
Intel Core i5-12400F $111Nvidia RTX 4070 $500Crucial T700 M.2 4TB $370
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