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WDWDS400T2X0E
Addlink
▲ 72554 ▼

Release date: Q3 2022.

VS
▲ 500 ▼
  

Release date ≈ Q3 2023.

Effective Speed 
+9%
Real World Speed
Performance profile from 8,776 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
4 User Benchmarks
Great bench: 558% 1.5TB free
Poor bench: 361% 6TB free (System drive)
Poor: 361% Great: 558%
SPEED RANK: 9th / 1080
Effective Speed
Effective SSD Speed 		522 % Slightly faster effective speed.
+9% 		478 %
Average Score 
+12%
Read
Avg. Sequential Read Speed 		3793 MB/s Much faster read speed.
+57% 		2415 MB/s
Write
Avg. Sequential Write Speed 		3816 MB/s Faster write speed.
+17% 		3265 MB/s
4K Read
Avg. 4K Random Read Speed 		67.2 MB/s Faster random read.
+24% 		54.1 MB/s
4K Write
Avg. 4K Random Write Speed 		189 MB/s 214 MB/s Faster random write.
+13%
Mixed
Avg. Sequential Mixed IO Speed 		2970 MB/s +3% 2884 MB/s
4K Mixed
Avg. 4K Random Mixed IO Speed 		83.5 MB/s +4% 80.6 MB/s
SusWrite
Avg. Sustained Write Speed 		3370 MB/s 3707 MB/s Slightly faster sustained write speed.
+10%
Peak Score 
+20%
Read
Peak Sequential Read Speed 		4696 MB/s Much faster peak read speed.
+78% 		2640 MB/s
Write
Peak Sequential Write Speed 		4940 MB/s Faster peak write speed.
+12% 		4411 MB/s
4K Read
Peak 4K Random Read Speed 		84.7 MB/s Much faster peak random read.
+31% 		64.7 MB/s
4K Write
Peak 4K Random Write Speed 		315 MB/s 338 MB/s Slightly faster peak random write.
+7%
Mixed
Peak Sequential Mixed IO Speed 		3586 MB/s Slightly faster peak mixed IO speed.
+8% 		3324 MB/s
4K Mixed
Peak 4K Random Mixed IO Speed 		113 MB/s Slightly faster peak random mixed IO.
+6% 		107 MB/s
SusWrite
Peak Sequential Sustained Write 60s Average 		4656 MB/s Faster peak sustained write speed.
+11% 		4193 MB/s
Value & Sentiment 
+∞%
Market Share
Based on 77,368,810 SSDs tested
See market share leaders
Market Share
Market Share (trailing 30 days) 		0.24 % Insanely higher market share.
+∞% 		0 %
User Rating
UBM User Rating 		72 % Much more popular.
+44% 		50 %
Nice To Haves 
+6%
Age
Newest 		26 Months 14+ Months Much more recent.
+46%
DQ Read
Peak 4K-64Thread Read Speed 		2486 MB/s +2% 2443 MB/s
DQ Write
Peak 4K-64Thread Write Speed 		2073 MB/s Faster peak deep queue write.
+20% 		1726 MB/s
AS-SSD Total
AS-SSD Total Score 		7497 Pts Stronger server IO.
+11% 		6,784 Pts
DQ Mixed
Peak 4K-64Thread Mixed IO Speed 		2284 MB/s Faster peak deep queue mixed IO.
+11% 		2057 MB/s
ADQ Read
Avg. 4K-64Thread Read Speed 		1787 MB/s 1905 MB/s Slightly faster deep queue read.
+7%
ADQ Write
Avg. 4K-64Thread Write Speed 		1382 MB/s Much faster deep queue write.
+44% 		960 MB/s
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed 		1548 MB/s Faster deep queue mixed IO.
+12% 		1381 MB/s
Specifications 
Capacity
Capacity 		4TB 8TB
Conclusion 
Average Bench 522%
Average Bench 478%

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]

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Solid State Drive Rankings (Price vs Performance) October 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.
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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.

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  • - 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
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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?
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 »

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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 Best
CPUGPUSSD
Intel Core i5-12600K $165Nvidia RTX 4060 $293WD Black SN850X M.2 2TB $135
Intel Core i5-12400F $112Nvidia RTX 4060-Ti $389WD Black SN850X M.2 1TB $82
Intel Core i5-13600K $200Nvidia RTX 4070 $500Crucial T700 M.2 4TB $350
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