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SamsungMZ-76E4T0B
OCZAGT4-25SAT3-256G
▲ 5236 ▼

Controller: Samsung MJX. Memory: Samsung 64 layer TLC V-NAND. Release date ≈ Q1 2018.

VS
▲ 51500 ▼

Controller: Indilinx Everest 2 IDX400M00. Flash Memory: Micron Asynchronous 25nm MLC. Release date: Q2 2012.

Effective Speed 
+56%
Real World Speed
Performance profile from 8,657 user samples
Benchmark your SSD here
7,241 User Benchmarks
Best Bench: 133% 2TB free
Worst Bench: 85% 3TB free (System drive)
Poor: 85% Great: 133%
SPEED RANK: 210th / 1080
1,416 User Benchmarks
Best Bench: 87% 238GB free
Worst Bench: 57% 185GB free (System drive)
Poor: 57% Great: 87%
SPEED RANK: 634th / 1080
Effective Speed
Effective SSD Speed 		113 % Much faster effective speed.
+56% 		72.3 %
Average Score 
+71%
Read
Avg. Sequential Read Speed 		485 MB/s Much faster read speed.
+76% 		276 MB/s
Write
Avg. Sequential Write Speed 		450 MB/s Much faster write speed.
+48% 		304 MB/s
4K Read
Avg. 4K Random Read Speed 		38.1 MB/s Hugely faster random read.
+107% 		18.4 MB/s
4K Write
Avg. 4K Random Write Speed 		91.3 MB/s 94.5 MB/s +4%
Mixed
Avg. Sequential Mixed IO Speed 		425 MB/s Hugely faster mixed IO speed.
+120% 		193 MB/s
4K Mixed
Avg. 4K Random Mixed IO Speed 		51.1 MB/s Hugely faster random mixed IO.
+89% 		27 MB/s
SusWrite
Avg. Sustained Write Speed 		437 MB/s Much faster sustained write speed.
+59% 		275 MB/s
Peak Score 
+60%
Read
Peak Sequential Read Speed 		516 MB/s Much faster peak read speed.
+54% 		336 MB/s
Write
Peak Sequential Write Speed 		491 MB/s Faster peak write speed.
+26% 		391 MB/s
4K Read
Peak 4K Random Read Speed 		46.6 MB/s Hugely faster peak random read.
+119% 		21.3 MB/s
4K Write
Peak 4K Random Write Speed 		127 MB/s 131 MB/s +3%
Mixed
Peak Sequential Mixed IO Speed 		465 MB/s Hugely faster peak mixed IO speed.
+97% 		236 MB/s
4K Mixed
Peak 4K Random Mixed IO Speed 		63.8 MB/s Hugely faster peak random mixed IO.
+101% 		31.8 MB/s
SusWrite
Peak Sequential Sustained Write 60s Average 		490 MB/s Faster peak sustained write speed.
+28% 		382 MB/s
Value & Sentiment 
�%
Market Share
Based on 77,547,290 SSDs tested
See market share leaders
Market Share
Market Share (trailing 30 days) 		0 % 0 %
Value
Value For Money 		42.9 % Hugely better value.
+105% 		20.9 %
User Rating
UBM User Rating 		52 % +2% 51 %
Price
Price (score) 		$380 $35 Hugely cheaper.
+91%
Nice To Haves 
+41%
Age
Newest 		81+ Months Much more recent.
+46% 		150 Months
DQ Read
Peak 4K-64Thread Read Speed 		387 MB/s Much faster peak deep queue read.
+52% 		255 MB/s
DQ Write
Peak 4K-64Thread Write Speed 		361 MB/s Faster peak deep queue write.
+14% 		316 MB/s
AS-SSD Total
AS-SSD Total Score 		1,287 Pts Much stronger server IO.
+33% 		964 Pts
DQ Mixed
Peak 4K-64Thread Mixed IO Speed 		370 MB/s Much faster peak deep queue mixed IO.
+78% 		208 MB/s
ADQ Read
Avg. 4K-64Thread Read Speed 		327 MB/s Much faster deep queue read.
+42% 		231 MB/s
ADQ Write
Avg. 4K-64Thread Write Speed 		273 MB/s Faster deep queue write.
+16% 		235 MB/s
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed 		288 MB/s Much faster deep queue mixed IO.
+48% 		194 MB/s
Specifications 
Capacity
Capacity 		4TB 256GB
Conclusion 
Average Bench 113%
Average Bench 72.3%

Currently one of the highest capacity consumer SATA SSD on the market, this SSD offers huge amount of capacity and high R/W which is limited by SATA 3 max bandwidth. However, 4TB SSD and bigger begin to offer lower GB per dollar (which equals lower value) than the lower capacity SSD in the market such as 2TB NVMe SSD (Intel 660p 2TB at $194-209). [Dec '19 ColdSpy]

MORE DETAILS

The OCZ Agility 4 is a relatively old SSD and has been included in the group test as a reference. In terms of overall speed the Agility 4 lags the current ten market leaders by an average of around 30%, considering that the Agility 4 is only 16 months old this highlights just how quickly the SSD market has evolved over the last two years. It's probably not worth upgrading for the sake of more speed unless you have a specific use case that demands it but if you are looking for a speed upgrade, you will gain up to around 50% by going for the Samsung 840 Pro or the OCZ Vector. [Sep '13 SSDrivePro]

MORE DETAILS

User Builds 
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1,416
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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.
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Brands make boatloads on flagships like the 4090 and 14900KS. We help users get similar real-world performance for less money.
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We don't pay youtubers, so they don't praise us. Moreover, our data obstructs youtubers who promote overpriced or inferior products.
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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 i5-13600K $210Nvidia RTX 4060 $280WD Black SN850X M.2 2TB $135
Intel Core i5-12600K $159Nvidia 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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