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Toshiba
SamsungMZ-77E4T0B
▲ 500 ▼
  

Release date ≈ Q3 2018.

VS
▲ 5121 ▼

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

Effective Speed 
+48%
Real World Speed
Performance profile from 9,462 user samples
Benchmark your SSD here
8 User Benchmarks
Best Bench: 110% 428GB free
Worst Bench: 42% 142GB free
Poor: 42% Great: 110%
SPEED RANK: 517th / 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 		78.6 % 117 % Much faster effective speed.
+48%
Average Score 
+67%
Read
Avg. Sequential Read Speed 		288 MB/s 481 MB/s Much faster read speed.
+67%
Write
Avg. Sequential Write Speed 		182 MB/s 451 MB/s Hugely faster write speed.
+148%
4K Read
Avg. 4K Random Read Speed 		32.5 MB/s 40.5 MB/s Faster random read.
+25%
4K Write
Avg. 4K Random Write Speed 		84.1 MB/s 90 MB/s Slightly faster random write.
+7%
Mixed
Avg. Sequential Mixed IO Speed 		301 MB/s 426 MB/s Much faster mixed IO speed.
+42%
4K Mixed
Avg. 4K Random Mixed IO Speed 		35.8 MB/s 53.6 MB/s Much faster random mixed IO.
+50%
SusWrite
Avg. Sustained Write Speed 		192 MB/s 445 MB/s Hugely faster sustained write speed.
+132%
Peak Score 
+19%
Read
Peak Sequential Read Speed 		509 MB/s 517 MB/s +2%
Write
Peak Sequential Write Speed 		459 MB/s 491 MB/s Slightly faster peak write speed.
+7%
4K Read
Peak 4K Random Read Speed 		41.6 MB/s 48.8 MB/s Faster peak random read.
+17%
4K Write
Peak 4K Random Write Speed 		105 MB/s 131 MB/s Faster peak random write.
+25%
Mixed
Peak Sequential Mixed IO Speed 		359 MB/s 464 MB/s Faster peak mixed IO speed.
+29%
4K Mixed
Peak 4K Random Mixed IO Speed 		45.9 MB/s 68.1 MB/s Much faster peak random mixed IO.
+48%
SusWrite
Peak Sequential Sustained Write 60s Average 		465 MB/s 489 MB/s Slightly faster peak sustained write speed.
+5%
Value & Sentiment 
+∞%
Market Share
Based on 77,542,622 SSDs tested
See market share leaders
Market Share
Market Share (trailing 30 days) 		0 % 0.06 % Insanely higher market share.
+∞%
User Rating
UBM User Rating 		50 % 51 % +2%
Nice To Haves 
+31%
Age
Newest 		75+ Months 45+ Months Much more recent.
+40%
DQ Read
Peak 4K-64Thread Read Speed 		325 MB/s 389 MB/s Faster peak deep queue read.
+20%
DQ Write
Peak 4K-64Thread Write Speed 		345 MB/s 364 MB/s Slightly faster peak deep queue write.
+6%
AS-SSD Total
AS-SSD Total Score 		1,140 Pts 1,301 Pts Stronger server IO.
+14%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed 		233 MB/s 374 MB/s Much faster peak deep queue mixed IO.
+61%
ADQ Read
Avg. 4K-64Thread Read Speed 		249 MB/s 354 MB/s Much faster deep queue read.
+42%
ADQ Write
Avg. 4K-64Thread Write Speed 		323 MB/s Slightly faster deep queue write.
+6% 		305 MB/s
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed 		190 MB/s 324 MB/s Much faster deep queue mixed IO.
+71%
Specifications 
Capacity
Capacity 		480GB 4TB
Conclusion 
Average Bench 78.6%
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]

Group Test Results

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 Frequently Asked Questions

Storage Devices FAQ
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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?
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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
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Intel Core i5-12600K $159Nvidia RTX 4060 $280WD Black SN850X M.2 2TB $135
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Intel Core i5-12400F $111Nvidia RTX 4070 $500Crucial T700 M.2 4TB $370
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