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SamsungMZ-77E4T0B
▲ 500 ▼
  

Release date ≈ Q4 2015.

VS
▲ 5121 ▼

Controller: Samsung MKX. Memory: Samsung 128 layer TLC V-NAND. Release date ≈ Q1 2021.

Effective Speed 
+90%
Real World Speed
Performance profile from 9,508 user samples
Benchmark your SSD here
54 User Benchmarks
Best Bench: 88% 180GB free (System drive)
Worst Bench: 43% 63GB free (System drive)
Poor: 43% Great: 88%
SPEED RANK: 798th / 1080
9,454 User Benchmarks
Best Bench: 137% 3.5TB free
Worst Bench: 90% 1.5TB free
Poor: 90% Great: 137%
SPEED RANK: 203rd / 1080
Effective Speed
Effective SSD Speed 		61.2 % 117 % Hugely faster effective speed.
+90%
Average Score 
+93%
Read
Avg. Sequential Read Speed 		407 MB/s 481 MB/s Faster read speed.
+18%
Write
Avg. Sequential Write Speed 		327 MB/s 451 MB/s Much faster write speed.
+38%
4K Read
Avg. 4K Random Read Speed 		18.7 MB/s 40.5 MB/s Hugely faster random read.
+117%
4K Write
Avg. 4K Random Write Speed 		34.2 MB/s 90 MB/s Hugely faster random write.
+163%
Mixed
Avg. Sequential Mixed IO Speed 		313 MB/s 426 MB/s Much faster mixed IO speed.
+36%
4K Mixed
Avg. 4K Random Mixed IO Speed 		21.8 MB/s 53.6 MB/s Hugely faster random mixed IO.
+146%
SusWrite
Avg. Sustained Write Speed 		189 MB/s 445 MB/s Hugely faster sustained write speed.
+135%
Peak Score 
+23%
Read
Peak Sequential Read Speed 		558 MB/s Slightly faster peak read speed.
+8% 		517 MB/s
Write
Peak Sequential Write Speed 		475 MB/s 491 MB/s +3%
4K Read
Peak 4K Random Read Speed 		38.3 MB/s 48.8 MB/s Faster peak random read.
+27%
4K Write
Peak 4K Random Write Speed 		79.9 MB/s 131 MB/s Much faster peak random write.
+64%
Mixed
Peak Sequential Mixed IO Speed 		427 MB/s 464 MB/s Slightly faster peak mixed IO speed.
+9%
4K Mixed
Peak 4K Random Mixed IO Speed 		45.2 MB/s 68.1 MB/s Much faster peak random mixed IO.
+51%
SusWrite
Peak Sequential Sustained Write 60s Average 		428 MB/s 489 MB/s Faster peak sustained write speed.
+14%
Value & Sentiment 
+∞%
Market Share
Based on 77,379,576 SSDs tested
See market share leaders
Market Share
Market Share (trailing 30 days) 		0 % 0.02 % Insanely higher market share.
+∞%
User Rating
UBM User Rating 		50 % 51 % +2%
Nice To Haves 
+34%
Age
Newest 		108+ Months 44+ Months Much more recent.
+59%
DQ Read
Peak 4K-64Thread Read Speed 		388 MB/s 389 MB/s +0%
DQ Write
Peak 4K-64Thread Write Speed 		342 MB/s 364 MB/s Slightly faster peak deep queue write.
+6%
AS-SSD Total
AS-SSD Total Score 		1,208 Pts 1,301 Pts Slightly stronger server IO.
+8%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed 		331 MB/s 374 MB/s Faster peak deep queue mixed IO.
+13%
ADQ Read
Avg. 4K-64Thread Read Speed 		254 MB/s 354 MB/s Much faster deep queue read.
+39%
ADQ Write
Avg. 4K-64Thread Write Speed 		194 MB/s 305 MB/s Much faster deep queue write.
+57%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed 		174 MB/s 324 MB/s Hugely faster deep queue mixed IO.
+86%
Specifications 
Capacity
Capacity 		215GB 4TB
Conclusion 
Average Bench 61.2%
Average Bench 117%

There are high failure rates for the 4TB version of this drive. After moderate use the drive can develop bad sectors which block file reads. Scandisk does not detect the errors and the data blocks are not recoverable. There are widespread reports of this problem but Samsung have yet to issue a statement. [Jul '23 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?
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What is incompressible data?
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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?
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The Best
CPUGPUSSD
Intel Core i5-12600K $165Nvidia RTX 4060 $295WD Black SN850X M.2 2TB $135
Intel Core i5-12400F $111Nvidia RTX 4060-Ti $389WD Black SN850X M.2 1TB $85
Intel Core i5-13600K $200Nvidia RTX 4070 $500Crucial T700 M.2 4TB $350
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