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WDWDS400T2X0E
SamsungMZ-7TE250BW
▲ 72554 ▼

Release date: Q3 2022.

VS
▲ 5335,450 ▼

Controller: Samsung 3 Core MEX. Memory: Samsung 19nm Toggle Mode TLC. Release date: Q3 2013.

Effective Speed 
+444%
Real World Speed
Performance profile from 225,887 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
217,115 User Benchmarks
Best Bench: 118% 68GB free
Worst Bench: 64% 231GB free
Poor: 64% Great: 118%
SPEED RANK: 284th / 1080
Effective Speed
Effective SSD Speed 		522 % Hugely faster effective speed.
+444% 		95.9 %
Average Score 
+605%
Read
Avg. Sequential Read Speed 		3,793 MB/s Hugely faster read speed.
+716% 		465 MB/s
Write
Avg. Sequential Write Speed 		3,816 MB/s Hugely faster write speed.
+869% 		394 MB/s
4K Read
Avg. 4K Random Read Speed 		67.2 MB/s Much faster random read.
+73% 		38.8 MB/s
4K Write
Avg. 4K Random Write Speed 		189 MB/s Hugely faster random write.
+122% 		85.3 MB/s
Mixed
Avg. Sequential Mixed IO Speed 		2,970 MB/s Hugely faster mixed IO speed.
+756% 		347 MB/s
4K Mixed
Avg. 4K Random Mixed IO Speed 		83.5 MB/s Much faster random mixed IO.
+74% 		48 MB/s
SusWrite
Avg. Sustained Write Speed 		3,370 MB/s Insanely faster sustained write speed.
+1,628% 		195 MB/s
Peak Score 
+612%
Read
Peak Sequential Read Speed 		4,696 MB/s Hugely faster peak read speed.
+826% 		507 MB/s
Write
Peak Sequential Write Speed 		4,940 MB/s Hugely faster peak write speed.
+910% 		489 MB/s
4K Read
Peak 4K Random Read Speed 		84.7 MB/s Hugely faster peak random read.
+81% 		46.7 MB/s
4K Write
Peak 4K Random Write Speed 		315 MB/s Hugely faster peak random write.
+165% 		119 MB/s
Mixed
Peak Sequential Mixed IO Speed 		3,586 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.
+89% 		59.8 MB/s
SusWrite
Peak Sequential Sustained Write 60s Average 		4,656 MB/s Insanely faster peak sustained write speed.
+1,457% 		299 MB/s
Value & Sentiment 
+513%
Market Share
Based on 77,480,531 SSDs tested
See market share leaders
Market Share
Market Share (trailing 30 days) 		0.26 % Hugely higher market share.
+100% 		0.13 %
Value
Value For Money 		260 % Insanely better value.
+1,981% 		12.5 %
User Rating
UBM User Rating 		72 % Much more popular.
+36% 		53 %
Price
Price (score) 		$265 $99 Much cheaper.
+63%
Nice To Haves 
+490%
Age
Newest 		27 Months Hugely more recent.
+80% 		136 Months
DQ Read
Peak 4K-64Thread Read Speed 		2,486 MB/s Hugely faster peak deep queue read.
+549% 		383 MB/s
DQ Write
Peak 4K-64Thread Write Speed 		2,073 MB/s Hugely faster peak deep queue write.
+473% 		362 MB/s
AS-SSD Total
AS-SSD Total Score 		7,497 Pts Hugely stronger server IO.
+489% 		1,273 Pts
DQ Mixed
Peak 4K-64Thread Mixed IO Speed 		2,284 MB/s Hugely faster peak deep queue mixed IO.
+864% 		237 MB/s
ADQ Read
Avg. 4K-64Thread Read Speed 		1,787 MB/s Hugely faster deep queue read.
+430% 		337 MB/s
ADQ Write
Avg. 4K-64Thread Write Speed 		1,382 MB/s Hugely faster deep queue write.
+372% 		293 MB/s
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed 		1,548 MB/s Hugely faster deep queue mixed IO.
+663% 		203 MB/s
Specifications 
Capacity
Capacity 		4TB 250GB
Conclusion 
Average Bench 522%
Average Bench 95.9%

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

The Evo is remarkable in that, like the Sandisk Extreme II, it features a second level cache. For the 250 GB Evo this consists of a 3 GB Turbowrite cache (TWC) which is a block of high speed Flash Memory. When the TWC is exhausted write speeds drop by approximately 50% but that won't often happen under typical consumer workloads. In terms of raw performance, even with its cache, the Evo still isn't the fastest drive. With a real world speed index reading of 439 MB/s the EVO is however, within reach of the two speed leaders (Vector and 850 Pro). At a price point of $130 the Evo is around 30% cheaper making it the best value for money SSDs I have seen in 2014. Comparing the Evo and the Sandisk Ultra Plus shows that the Evo is the winner but the Sandisk may be a viable alternative thanks to its cache-free, and therefore more consistent performance during extended writes. [Aug '14 SSDrivePro]

MORE DETAILS

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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.
  • 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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 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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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 i5-12600K $169Nvidia RTX 4060 $296WD Black SN850X M.2 2TB $135
Intel Core i5-12400F $111Nvidia RTX 4060-Ti $345WD Black SN850X M.2 1TB $84
Intel Core i5-13600K $225Nvidia RTX 4070 $500Crucial T700 M.2 4TB $350
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