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SamsungMZ-7KE256BW
▲ 500 ▼
  

Release date ≈ Q3 2018.

VS
▲ 5441,223 ▼

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

Effective Speed 
+0%
Real World Speed
Performance profile from 142,334 user samples
Benchmark your SSD here
405 User Benchmarks
Best Bench: 126% 478GB free
Worst Bench: 65% 685GB free
Poor: 65% Great: 126%
SPEED RANK: 257th / 1080
141,929 User Benchmarks
Best Bench: 124% 238GB free
Worst Bench: 71% 71GB free (System drive)
Poor: 71% Great: 124%
SPEED RANK: 256th / 1080
Effective Speed
Effective SSD Speed 		102 % 102 % +0%
Average Score 
+3%
Read
Avg. Sequential Read Speed 		464 MB/s 469 MB/s +1%
Write
Avg. Sequential Write Speed 		417 MB/s Slightly faster write speed.
+5% 		396 MB/s
4K Read
Avg. 4K Random Read Speed 		35.3 MB/s +4% 33.9 MB/s
4K Write
Avg. 4K Random Write Speed 		83.3 MB/s 89.6 MB/s Slightly faster random write.
+8%
Mixed
Avg. Sequential Mixed IO Speed 		374 MB/s Faster mixed IO speed.
+12% 		334 MB/s
4K Mixed
Avg. 4K Random Mixed IO Speed 		46 MB/s +4% 44.1 MB/s
SusWrite
Avg. Sustained Write Speed 		360 MB/s +4% 346 MB/s
Peak Score 
+3%
Read
Peak Sequential Read Speed 		514 MB/s 515 MB/s +0%
Write
Peak Sequential Write Speed 		487 MB/s 488 MB/s +0%
4K Read
Peak 4K Random Read Speed 		44.7 MB/s +3% 43.6 MB/s
4K Write
Peak 4K Random Write Speed 		117 MB/s 125 MB/s Slightly faster peak random write.
+7%
Mixed
Peak Sequential Mixed IO Speed 		458 MB/s Faster peak mixed IO speed.
+20% 		383 MB/s
4K Mixed
Peak 4K Random Mixed IO Speed 		61.6 MB/s Slightly faster peak random mixed IO.
+9% 		56.7 MB/s
SusWrite
Peak Sequential Sustained Write 60s Average 		483 MB/s 484 MB/s +0%
Value & Sentiment 
+∞%
Market Share
Based on 77,494,433 SSDs tested
See market share leaders
Market Share
Market Share (trailing 30 days) 		0 % 0.07 % Insanely higher market share.
+∞%
User Rating
UBM User Rating 		50 % 54 % Slightly more popular.
+8%
Nice To Haves 
+1%
Age
Newest 		75+ Months Much more recent.
+40% 		124 Months
DQ Read
Peak 4K-64Thread Read Speed 		389 MB/s +0% 388 MB/s
DQ Write
Peak 4K-64Thread Write Speed 		362 MB/s +0% 361 MB/s
AS-SSD Total
AS-SSD Total Score 		1,276 Pts 1,280 Pts +0%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed 		368 MB/s +3% 356 MB/s
ADQ Read
Avg. 4K-64Thread Read Speed 		297 MB/s 344 MB/s Faster deep queue read.
+16%
ADQ Write
Avg. 4K-64Thread Write Speed 		261 MB/s 282 MB/s Slightly faster deep queue write.
+8%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed 		234 MB/s 295 MB/s Faster deep queue mixed IO.
+26%
Specifications 
Capacity
Capacity 		995GB 256GB
Conclusion 
Average Bench 102%
Average Bench 102%

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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Storage Devices FAQ
What is sustained sequential write speed?
What’s the difference between SLC, MLC and TLC?
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What’s the difference between SATA, PCIe and NVMe?
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Solid State Drives
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What is 4K 64 thread write speed?
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