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WDWDS400T2X0E
ToshibaHDTS251EZSTA HDTS251XZSTA THNSNH512GBST
▲ 72554 ▼

Release date: Q3 2022.

VS
▲ 501 ▼
  

Controller: Toshiba TC58NC5HA9GST. NAND Memory: Toshiba Asynchronous 19mn MLC. Release date ≤ Q1 2014.

Effective Speed 
+526%
Real World Speed
Performance profile from 9,286 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
514 User Benchmarks
Best Bench: 105% 477GB free
Worst Bench: 58% 25GB free (System drive)
Poor: 58% Great: 105%
SPEED RANK: 443rd / 1080
Effective Speed
Effective SSD Speed 		522 % Hugely faster effective speed.
+526% 		83.3 %
Average Score 
+568%
Read
Avg. Sequential Read Speed 		3,793 MB/s Hugely faster read speed.
+741% 		451 MB/s
Write
Avg. Sequential Write Speed 		3,816 MB/s Hugely faster write speed.
+990% 		350 MB/s
4K Read
Avg. 4K Random Read Speed 		67.2 MB/s Hugely faster random read.
+218% 		21.1 MB/s
4K Write
Avg. 4K Random Write Speed 		189 MB/s Hugely faster random write.
+190% 		65.2 MB/s
Mixed
Avg. Sequential Mixed IO Speed 		2,970 MB/s Hugely faster mixed IO speed.
+669% 		386 MB/s
4K Mixed
Avg. 4K Random Mixed IO Speed 		83.5 MB/s Hugely faster random mixed IO.
+149% 		33.5 MB/s
SusWrite
Avg. Sustained Write Speed 		3,370 MB/s Insanely faster sustained write speed.
+1,016% 		302 MB/s
Peak Score 
+553%
Read
Peak Sequential Read Speed 		4,696 MB/s Hugely faster peak read speed.
+824% 		508 MB/s
Write
Peak Sequential Write Speed 		4,940 MB/s Hugely faster peak write speed.
+931% 		479 MB/s
4K Read
Peak 4K Random Read Speed 		84.7 MB/s Hugely faster peak random read.
+215% 		26.9 MB/s
4K Write
Peak 4K Random Write Speed 		315 MB/s Hugely faster peak random write.
+212% 		101 MB/s
Mixed
Peak Sequential Mixed IO Speed 		3,586 MB/s Hugely faster peak mixed IO speed.
+617% 		500 MB/s
4K Mixed
Peak 4K Random Mixed IO Speed 		113 MB/s Hugely faster peak random mixed IO.
+155% 		44.4 MB/s
SusWrite
Peak Sequential Sustained Write 60s Average 		4,656 MB/s Hugely faster peak sustained write speed.
+919% 		457 MB/s
Value & Sentiment 
+∞%
Market Share
Based on 77,570,411 SSDs tested
See market share leaders
Market Share
Market Share (trailing 30 days) 		0.21 % Insanely higher market share.
+∞% 		0 %
User Rating
UBM User Rating 		72 % Much more popular.
+44% 		50 %
Nice To Haves 
+485%
Age
Newest 		27 Months Much more recent.
+79% 		128+ Months
DQ Read
Peak 4K-64Thread Read Speed 		2,486 MB/s Hugely faster peak deep queue read.
+579% 		366 MB/s
DQ Write
Peak 4K-64Thread Write Speed 		2,073 MB/s Hugely faster peak deep queue write.
+523% 		333 MB/s
AS-SSD Total
AS-SSD Total Score 		7,497 Pts Hugely stronger server IO.
+547% 		1,159 Pts
DQ Mixed
Peak 4K-64Thread Mixed IO Speed 		2,284 MB/s Hugely faster peak deep queue mixed IO.
+547% 		353 MB/s
ADQ Read
Avg. 4K-64Thread Read Speed 		1,787 MB/s Hugely faster deep queue read.
+516% 		290 MB/s
ADQ Write
Avg. 4K-64Thread Write Speed 		1,382 MB/s Hugely faster deep queue write.
+512% 		226 MB/s
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed 		1,548 MB/s Hugely faster deep queue mixed IO.
+582% 		227 MB/s
Specifications 
Capacity
Capacity 		4TB 512GB
Conclusion 
Average Bench 522%
Average Bench 83.3%

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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 Frequently Asked Questions

Storage Devices FAQ
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Solid State Drives
What is the SSD value for money rating?
What is 4K 64 thread write speed?
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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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The Best
CPUGPUSSD
Intel Core i5-13600K $210Nvidia RTX 4060 $290WD Black SN850X M.2 2TB $135
Intel Core i5-12600K $167Nvidia RTX 4060-Ti $389WD Black SN850X M.2 1TB $84
Intel Core i5-12400F $111Nvidia RTX 4070 $500Crucial T700 M.2 4TB $406
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