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WDWDS400T2X0E
Micron

Release date: Q3 2022.

  

Release date ≈ Q3 2019.

Real World Speed
Performance profile from 14,325 user samples
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
5,553 User Benchmarks
Best Bench: 215% 66GB free (System drive)
Worst Bench: 101% 227GB free (System drive)
Poor: 101% Great: 215%
SPEED RANK: 143rd / 1080
Effective Speed
Effective SSD Speed
522 % Hugely faster effective speed.
+213%
167 %
Read
Avg. Sequential Read Speed
3793 MB/s Hugely faster read speed.
+245%
1098 MB/s
Write
Avg. Sequential Write Speed
3816 MB/s Hugely faster write speed.
+299%
957 MB/s
4K Read
Avg. 4K Random Read Speed
67.2 MB/s Much faster random read.
+64%
41 MB/s
4K Write
Avg. 4K Random Write Speed
189 MB/s Hugely faster random write.
+197%
63.7 MB/s
Mixed
Avg. Sequential Mixed IO Speed
2970 MB/s Hugely faster mixed IO speed.
+236%
883 MB/s
4K Mixed
Avg. 4K Random Mixed IO Speed
83.5 MB/s Hugely faster random mixed IO.
+84%
45.4 MB/s
SusWrite
Avg. Sustained Write Speed
3370 MB/s Hugely faster sustained write speed.
+341%
764 MB/s
Read
Peak Sequential Read Speed
4696 MB/s Hugely faster peak read speed.
+209%
1522 MB/s
Write
Peak Sequential Write Speed
4940 MB/s Hugely faster peak write speed.
+284%
1288 MB/s
4K Read
Peak 4K Random Read Speed
84.7 MB/s Hugely faster peak random read.
+81%
46.8 MB/s
4K Write
Peak 4K Random Write Speed
315 MB/s Hugely faster peak random write.
+244%
91.5 MB/s
Mixed
Peak Sequential Mixed IO Speed
3586 MB/s Hugely faster peak mixed IO speed.
+213%
1147 MB/s
4K Mixed
Peak 4K Random Mixed IO Speed
113 MB/s Hugely faster peak random mixed IO.
+92%
59 MB/s
SusWrite
Peak Sequential Sustained Write 60s Average
4656 MB/s Hugely faster peak sustained write speed.
+294%
1183 MB/s
Market Share
Based on 77,137,299 SSDs tested
Market Share
Market Share (trailing 30 days)
0.21 % Hugely higher market share.
+950%
0.02 %
User Rating
UBM User Rating
72 % Much more popular.
+44%
50 %
Age
Newest
26 Months Much more recent.
+58%
62+ Months
DQ Read
Peak 4K-64Thread Read Speed
2486 MB/s Hugely faster peak deep queue read.
+163%
944 MB/s
DQ Write
Peak 4K-64Thread Write Speed
2073 MB/s Hugely faster peak deep queue write.
+144%
851 MB/s
AS-SSD Total
AS-SSD Total Score
7497 Pts Hugely stronger server IO.
+168%
2,798 Pts
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
2284 MB/s Hugely faster peak deep queue mixed IO.
+156%
892 MB/s
ADQ Read
Avg. 4K-64Thread Read Speed
1787 MB/s Hugely faster deep queue read.
+145%
730 MB/s
ADQ Write
Avg. 4K-64Thread Write Speed
1382 MB/s Hugely faster deep queue write.
+145%
563 MB/s
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
1548 MB/s Hugely faster deep queue mixed IO.
+130%
673 MB/s
Capacity
Capacity
4TB 512GB

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

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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The Best
CPUGPUSSD
Intel Core i5-12600K $164Nvidia RTX 4060 $299WD Black SN850X M.2 2TB $150
Intel Core i5-12400F $112Nvidia RTX 4060-Ti $380WD Black SN850X M.2 1TB $75
Intel Core i5-13600K $218Nvidia RTX 4070 $500Crucial T700 M.2 4TB $350
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