COMPARE
Today's hottest
Amazon Ebay
deals
SSD
RANKINGS
TEST
YOUR SSD
ADD TO PC
BUILD
Kingston
SamsungMZ-77E4T0B
▲ 500 ▼
  

Release date ≈ Q1 2020.

VS
▲ 5121 ▼

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

Effective Speed 
+113%
Real World Speed
Performance profile from 9,475 user samples
Benchmark your SSD here
21 User Benchmarks
Great bench: 86% 73GB free (System drive)
Poor bench: 29% 168GB free (System drive)
Poor: 29% Great: 86%
SPEED RANK: 864th / 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 		54.6 % 117 % Hugely faster effective speed.
+113%
Average Score 
+110%
Read
Avg. Sequential Read Speed 		374 MB/s 481 MB/s Faster read speed.
+29%
Write
Avg. Sequential Write Speed 		339 MB/s 451 MB/s Much faster write speed.
+33%
4K Read
Avg. 4K Random Read Speed 		18.8 MB/s 40.5 MB/s Hugely faster random read.
+115%
4K Write
Avg. 4K Random Write Speed 		48 MB/s 90 MB/s Hugely faster random write.
+88%
Mixed
Avg. Sequential Mixed IO Speed 		194 MB/s 426 MB/s Hugely faster mixed IO speed.
+120%
4K Mixed
Avg. 4K Random Mixed IO Speed 		15.7 MB/s 53.6 MB/s Hugely faster random mixed IO.
+241%
SusWrite
Avg. Sustained Write Speed 		184 MB/s 445 MB/s Hugely faster sustained write speed.
+142%
Peak Score 
+37%
Read
Peak Sequential Read Speed 		447 MB/s 517 MB/s Faster peak read speed.
+16%
Write
Peak Sequential Write Speed 		401 MB/s 491 MB/s Faster peak write speed.
+22%
4K Read
Peak 4K Random Read Speed 		28.2 MB/s 48.8 MB/s Much faster peak random read.
+73%
4K Write
Peak 4K Random Write Speed 		109 MB/s 131 MB/s Faster peak random write.
+20%
Mixed
Peak Sequential Mixed IO Speed 		356 MB/s 464 MB/s Much faster peak mixed IO speed.
+30%
4K Mixed
Peak 4K Random Mixed IO Speed 		38.8 MB/s 68.1 MB/s Much faster peak random mixed IO.
+76%
SusWrite
Peak Sequential Sustained Write 60s Average 		392 MB/s 489 MB/s Faster peak sustained write speed.
+25%
Value & Sentiment 
+∞%
Market Share
Based on 77,510,741 SSDs tested
See market share leaders
Market Share
Market Share (trailing 30 days) 		0 % 0.03 % Insanely higher market share.
+∞%
User Rating
UBM User Rating 		50 % 51 % +2%
Nice To Haves 
+147%
Age
Newest 		58+ Months 45+ Months More recent.
+22%
DQ Read
Peak 4K-64Thread Read Speed 		144 MB/s 389 MB/s Hugely faster peak deep queue read.
+170%
DQ Write
Peak 4K-64Thread Write Speed 		316 MB/s 364 MB/s Faster peak deep queue write.
+15%
AS-SSD Total
AS-SSD Total Score 		802 Pts 1,301 Pts Much stronger server IO.
+62%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed 		195 MB/s 374 MB/s Hugely faster peak deep queue mixed IO.
+92%
ADQ Read
Avg. 4K-64Thread Read Speed 		111 MB/s 354 MB/s Hugely faster deep queue read.
+219%
ADQ Write
Avg. 4K-64Thread Write Speed 		175 MB/s 305 MB/s Much faster deep queue write.
+74%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed 		52.1 MB/s 324 MB/s Hugely faster deep queue mixed IO.
+522%
Specifications 
Capacity
Capacity 		256GB 4TB
Conclusion 
Average Bench 54.6%
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]

MORE DETAILS

User Builds 
21
9,454
Custom PC Builder (Start a new build) Build your perfect PC: compare component prices, popularity, speed and value for money

CHOOSE A COMPONENT:

CPU GPU SSD HDD RAM MBD
Solid State Drive Rankings (Price vs Performance) November 2024 SSD Rankings

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

  • 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 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 value for money upgrades.

UserBenchmark of the month

Gaming Desktop ProGaming

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

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?
How is the AS SSD read score calculated?
How is the AS SSD total score calculated?
ALL FAQs »

 Best User Rated
Why does UserBenchmark have a bad reputation on reddit?
Marketers operate thousands of reddit accounts. Our benchmarks expose their spiel so they attack our reputation.
Why don’t PC brands endorse UserBenchmark?
Brands make boatloads on flagships like the 4090 and 14900KS. We help users get similar real-world performance for less money.
Why don’t youtubers promote UserBenchmark?
We don't pay youtubers, so they don't praise us. Moreover, our data obstructs youtubers who promote overpriced or inferior products.
Why does UserBenchmark have negative trustpilot reviews?
The 200+ trustpilot reviews are mostly written by virgin marketing accounts. Real users don't give a monkey's about big brands.
Why is UserBenchmark the gold standard for users?
Instead of pursuing brands for sponsorship, we've spent 13 years publishing real-world data for users.
The Best
CPUGPUSSD
Intel Core i5-12600K $159Nvidia RTX 4060 $295WD Black SN850X M.2 2TB $135
Intel Core i5-13600K $210Nvidia RTX 4060-Ti $380WD Black SN850X M.2 1TB $84
Intel Core i5-12400F $111Nvidia RTX 4070 $500Crucial T700 M.2 4TB $370
Today's hottest
Amazon Ebay
deals
If you buy something via a price link, UserBenchmark may earn a commission
Build Test EFps
Can You Run It?
►
YouTube
*NEW*
About  •  User Guide  •  FAQs  •  Email  •  Privacy  •  Developer  •  YouTube Feedback