COMPARE
Today's hottest
Amazon Ebay
deals
SSD
RANKINGS
TEST
YOUR SSD
ADD TO PC
BUILD
WDWDS400T2X0E
SamsungMZ-76Q4T0B(W|/AM)
▲ 72554 ▼

Release date: Q3 2022.

VS
▲ 5011 ▼

Release date ≈ Q1 2019.

Effective Speed 
+414%
Real World Speed
Performance profile from 11,795 user samples
Benchmark your SSD here
8,772 User Benchmarks
Great bench: 683% 3.5TB free
Poor bench: 288% 2.5TB free (System drive)
Poor: 288% Great: 683%
SPEED RANK: 7th / 1080
3,023 User Benchmarks
Best Bench: 124% 936GB free
Worst Bench: 70% 2TB free (System drive)
Poor: 70% Great: 124%
SPEED RANK: 258th / 1080
Effective Speed
Effective SSD Speed 		522 % Hugely faster effective speed.
+414% 		102 %
Average Score 
+481%
Read
Avg. Sequential Read Speed 		3793 MB/s Hugely faster read speed.
+685% 		483 MB/s
Write
Avg. Sequential Write Speed 		3816 MB/s Hugely faster write speed.
+809% 		420 MB/s
4K Read
Avg. 4K Random Read Speed 		67.2 MB/s Hugely faster random read.
+117% 		31 MB/s
4K Write
Avg. 4K Random Write Speed 		189 MB/s Hugely faster random write.
+103% 		92.9 MB/s
Mixed
Avg. Sequential Mixed IO Speed 		2970 MB/s Hugely faster mixed IO speed.
+707% 		368 MB/s
4K Mixed
Avg. 4K Random Mixed IO Speed 		83.5 MB/s Hugely faster random mixed IO.
+91% 		43.7 MB/s
SusWrite
Avg. Sustained Write Speed 		3370 MB/s Hugely faster sustained write speed.
+855% 		353 MB/s
Peak Score 
+529%
Read
Peak Sequential Read Speed 		4696 MB/s Hugely faster peak read speed.
+810% 		516 MB/s
Write
Peak Sequential Write Speed 		4940 MB/s Hugely faster peak write speed.
+902% 		493 MB/s
4K Read
Peak 4K Random Read Speed 		84.7 MB/s Hugely faster peak random read.
+133% 		36.4 MB/s
4K Write
Peak 4K Random Write Speed 		315 MB/s Hugely faster peak random write.
+142% 		130 MB/s
Mixed
Peak Sequential Mixed IO Speed 		3586 MB/s Hugely faster peak mixed IO speed.
+758% 		418 MB/s
4K Mixed
Peak 4K Random Mixed IO Speed 		113 MB/s Hugely faster peak random mixed IO.
+110% 		53.7 MB/s
SusWrite
Peak Sequential Sustained Write 60s Average 		4656 MB/s Hugely faster peak sustained write speed.
+850% 		490 MB/s
Value & Sentiment 
+∞%
Market Share
Based on 77,465,210 SSDs tested
See market share leaders
Market Share
Market Share (trailing 30 days) 		0.25 % Insanely higher market share.
+∞% 		0 %
Value
Value For Money 		260 % Hugely better value.
+464% 		46 %
User Rating
UBM User Rating 		72 % Much more popular.
+44% 		50 %
Price
Price (score) 		$265 Cheaper.
+12% 		$300
Nice To Haves 
+419%
Age
Newest 		27 Months Much more recent.
+60% 		67+ Months
DQ Read
Peak 4K-64Thread Read Speed 		2486 MB/s Hugely faster peak deep queue read.
+542% 		387 MB/s
DQ Write
Peak 4K-64Thread Write Speed 		2073 MB/s Hugely faster peak deep queue write.
+473% 		362 MB/s
AS-SSD Total
AS-SSD Total Score 		7497 Pts Hugely stronger server IO.
+490% 		1,271 Pts
DQ Mixed
Peak 4K-64Thread Mixed IO Speed 		2284 MB/s Hugely faster peak deep queue mixed IO.
+521% 		368 MB/s
ADQ Read
Avg. 4K-64Thread Read Speed 		1787 MB/s Hugely faster deep queue read.
+440% 		331 MB/s
ADQ Write
Avg. 4K-64Thread Write Speed 		1382 MB/s Hugely faster deep queue write.
+397% 		278 MB/s
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed 		1548 MB/s Hugely faster deep queue mixed IO.
+427% 		294 MB/s
Specifications 
Capacity
Capacity 		4TB 4TB
Conclusion 
Average Bench 522%
Average Bench 102%

The WD Black SN850X has a superb consumer performance profile. As well as offering solid burst speeds of 5 GB/s, the SN850X also offers respectable out of cache performance. At current prices (1TB $90 USD, 2TB $145 USD and 4TB $290 USD) the WD Black SN850X is our top value pick at every capacity. [Jun '24 SSDrivePro]

MORE DETAILS

Slightly cheaper than Samsung 860 EVO 4TB but i see almost no reason to buy this SSD as you could get the mentioned SSD at couple of tens more but unless if you had a very tight budget to buy 4TB SSD. May or may be not worth it depending on pricing of this SSD and 860 EVO 4TB and pricing delta as both of them had nearly identical performance aside from HDD-like R/W when this SSD runs out of cache while transferring huge files. [Dec '19 ColdSpy]

MORE DETAILS

User Builds 
8,772
3,023
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 $169Nvidia RTX 4060 $295WD Black SN850X M.2 2TB $135
Intel Core i5-12400F $111Nvidia RTX 4060-Ti $345WD Black SN850X M.2 1TB $80
Intel Core i5-13600K $215Nvidia RTX 4070 $500Crucial T700 M.2 4TB $350
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