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SamsungMZ-7KE256BW
Amd-raid
▲ 5441,223 ▼

Controller: Samsung Triple Core MEX. Memory: Samsung 40nm MLC V-NAND. Release date: Q3 2014.

VS
▲ 500 ▼
  

Release date ≈ Q2 2021.

Effective Speed 
+140%
Real World Speed
Performance profile from 141,931 user samples
Benchmark your SSD here
141,929 User Benchmarks
Best Bench: 124% 238GB free
Worst Bench: 71% 71GB free (System drive)
Poor: 71% Great: 124%
SPEED RANK: 256th / 1080
2 User Benchmarks
Best Bench: 249% 3.5TB free (System drive)
Worst Bench: 240% 3.5TB free (System drive)
Poor: 240% Great: 249%
SPEED RANK: 66th / 1080
Effective Speed
Effective SSD Speed 		102 % 245 % Hugely faster effective speed.
+140%
Average Score 
+210%
Read
Avg. Sequential Read Speed 		469 MB/s 1434 MB/s Hugely faster read speed.
+206%
Write
Avg. Sequential Write Speed 		396 MB/s 2280 MB/s Hugely faster write speed.
+476%
4K Read
Avg. 4K Random Read Speed 		33.9 MB/s 36 MB/s Slightly faster random read.
+6%
4K Write
Avg. 4K Random Write Speed 		89.6 MB/s 120 MB/s Much faster random write.
+34%
Mixed
Avg. Sequential Mixed IO Speed 		334 MB/s 1624 MB/s Hugely faster mixed IO speed.
+386%
4K Mixed
Avg. 4K Random Mixed IO Speed 		44.1 MB/s 58.3 MB/s Much faster random mixed IO.
+32%
SusWrite
Avg. Sustained Write Speed 		346 MB/s 1476 MB/s Hugely faster sustained write speed.
+327%
Peak Score 
+155%
Read
Peak Sequential Read Speed 		515 MB/s 1451 MB/s Hugely faster peak read speed.
+182%
Write
Peak Sequential Write Speed 		488 MB/s 2336 MB/s Hugely faster peak write speed.
+379%
4K Read
Peak 4K Random Read Speed 		43.6 MB/s Faster peak random read.
+18% 		37 MB/s
4K Write
Peak 4K Random Write Speed 		125 MB/s +1% 124 MB/s
Mixed
Peak Sequential Mixed IO Speed 		383 MB/s 1636 MB/s Hugely faster peak mixed IO speed.
+327%
4K Mixed
Peak 4K Random Mixed IO Speed 		56.7 MB/s 59.2 MB/s +4%
SusWrite
Peak Sequential Sustained Write 60s Average 		484 MB/s 1516 MB/s Hugely faster peak sustained write speed.
+213%
Value & Sentiment 
+8%
Market Share
Based on 77,380,059 SSDs tested
See market share leaders
User Rating
UBM User Rating 		54 % Slightly more popular.
+8% 		50 %
Nice To Haves 
+143%
Age
Newest 		124 Months 41+ Months Much more recent.
+67%
DQ Read
Peak 4K-64Thread Read Speed 		388 MB/s 747 MB/s Hugely faster peak deep queue read.
+93%
DQ Write
Peak 4K-64Thread Write Speed 		361 MB/s 980 MB/s Hugely faster peak deep queue write.
+171%
AS-SSD Total
AS-SSD Total Score 		1,280 Pts 2794 Pts Hugely stronger server IO.
+118%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed 		356 MB/s 890 MB/s Hugely faster peak deep queue mixed IO.
+150%
ADQ Read
Avg. 4K-64Thread Read Speed 		344 MB/s 696 MB/s Hugely faster deep queue read.
+102%
ADQ Write
Avg. 4K-64Thread Write Speed 		282 MB/s 977 MB/s Hugely faster deep queue write.
+246%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed 		295 MB/s 884 MB/s Hugely faster deep queue mixed IO.
+200%
Specifications 
Capacity
Capacity 		256GB 4TB
Conclusion 
Average Bench 102%
Average Bench 245%

The 256GB Samsung 850 Pro is the fastest consumer SSD we have seen to date. Thanks to Samsung's new 3D V-NAND the 850 Pro has lower power consumption and better performance, albeit marginally, than both the 840 Evo and 840 Pro. Looking at the benchmark figures for the 840 and 850 Pros shows that the effective performance improvement is 10% whereas the 850 Pro beats the 840 Evo by 16%. These drives effectively saturate SATA 3.0 making it difficult to distinguish between them in day-to-day use. At current prices the 850 Pro is prohibitively expensive, prices need to drop by 15% before it approaches the 840 Pro from a value perspective. Samsung may release a value orientated 850 Evo soon, but for now "most" users are better off with the 840 Pro. [Oct '14 SSDrivePro]

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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]

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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?
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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 i5-12600K $165Nvidia RTX 4060 $295WD Black SN850X M.2 2TB $135
Intel Core i5-12400F $111Nvidia RTX 4060-Ti $389WD Black SN850X M.2 1TB $85
Intel Core i5-13600K $200Nvidia RTX 4070 $500Crucial T700 M.2 4TB $350
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