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WDWDS400T2X0E
Nvme
▲ 72554 ▼

Release date: Q3 2022.

VS
▲ 500 ▼
  

Release date ≈ Q4 2021.

Effective Speed 
+93%
Real World Speed
Performance profile from 9,458 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
686 User Benchmarks
Best Bench: 369% 423GB free (System drive)
Worst Bench: 136% 424GB free (System drive)
Poor: 136% Great: 369%
SPEED RANK: 53rd / 1080
Effective Speed
Effective SSD Speed 		522 % Hugely faster effective speed.
+93% 		271 %
Average Score 
+66%
Read
Avg. Sequential Read Speed 		3,793 MB/s Hugely faster read speed.
+93% 		1,965 MB/s
Write
Avg. Sequential Write Speed 		3,816 MB/s Much faster write speed.
+50% 		2,537 MB/s
4K Read
Avg. 4K Random Read Speed 		67.2 MB/s Faster random read.
+23% 		54.7 MB/s
4K Write
Avg. 4K Random Write Speed 		189 MB/s Much faster random write.
+33% 		142 MB/s
Mixed
Avg. Sequential Mixed IO Speed 		2,970 MB/s Much faster mixed IO speed.
+69% 		1,759 MB/s
4K Mixed
Avg. 4K Random Mixed IO Speed 		83.5 MB/s Faster random mixed IO.
+11% 		75 MB/s
SusWrite
Avg. Sustained Write Speed 		3,370 MB/s Hugely faster sustained write speed.
+182% 		1,197 MB/s
Peak Score 
+54%
Read
Peak Sequential Read Speed 		4,696 MB/s Hugely faster peak read speed.
+84% 		2,554 MB/s
Write
Peak Sequential Write Speed 		4,940 MB/s Much faster peak write speed.
+30% 		3,794 MB/s
4K Read
Peak 4K Random Read Speed 		84.7 MB/s Faster peak random read.
+22% 		69.4 MB/s
4K Write
Peak 4K Random Write Speed 		315 MB/s Much faster peak random write.
+36% 		232 MB/s
Mixed
Peak Sequential Mixed IO Speed 		3,586 MB/s Much faster peak mixed IO speed.
+53% 		2,337 MB/s
4K Mixed
Peak 4K Random Mixed IO Speed 		113 MB/s Faster peak random mixed IO.
+11% 		102 MB/s
SusWrite
Peak Sequential Sustained Write 60s Average 		4,656 MB/s Hugely faster peak sustained write speed.
+139% 		1,947 MB/s
Value & Sentiment 
+∞%
Market Share
Based on 77,488,056 SSDs tested
See market share leaders
Market Share
Market Share (trailing 30 days) 		0.25 % Insanely higher market share.
+∞% 		0 %
User Rating
UBM User Rating 		72 % Much more popular.
+44% 		50 %
Nice To Haves 
+58%
Age
Newest 		27 Months More recent.
+23% 		35+ Months
DQ Read
Peak 4K-64Thread Read Speed 		2,486 MB/s Much faster peak deep queue read.
+72% 		1,446 MB/s
DQ Write
Peak 4K-64Thread Write Speed 		2,073 MB/s Much faster peak deep queue write.
+44% 		1,440 MB/s
AS-SSD Total
AS-SSD Total Score 		7,497 Pts Much stronger server IO.
+56% 		4,804 Pts
DQ Mixed
Peak 4K-64Thread Mixed IO Speed 		2,284 MB/s Much faster peak deep queue mixed IO.
+53% 		1,495 MB/s
ADQ Read
Avg. 4K-64Thread Read Speed 		1,787 MB/s Much faster deep queue read.
+68% 		1,063 MB/s
ADQ Write
Avg. 4K-64Thread Write Speed 		1,382 MB/s Hugely faster deep queue write.
+82% 		759 MB/s
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed 		1,548 MB/s Much faster deep queue mixed IO.
+65% 		937 MB/s
Specifications 
Capacity
Capacity 		4TB 512GB
Conclusion 
Average Bench 522%
Average Bench 271%

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) 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.
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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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 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?
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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?
What is the effective SSD speed index?
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The Best
CPUGPUSSD
Intel Core i5-12600K $169Nvidia RTX 4060 $296WD Black SN850X M.2 2TB $135
Intel Core i5-12400F $110Nvidia RTX 4060-Ti $380WD Black SN850X M.2 1TB $75
Intel Core i5-13600K $225Nvidia RTX 4070 $500Crucial T700 M.2 4TB $350
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