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SeagateST400FP0021
SamsungMZ-7KE256BW
▲ 500 ▼
  

Release date ≈ Q2 2014.

VS
▲ 5441,222 ▼

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

Effective Speed 
+0%
Real World Speed
Performance profile from 141,930 user samples
Benchmark your SSD here
1 User Benchmark
Best Bench: 102% 372GB free
Worst Bench: 102% 372GB free
Poor: 102% Great: 102%
SPEED RANK: 254th / 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 % +0% 102 %
Average Score 
+4%
Read
Avg. Sequential Read Speed 		511 MB/s Slightly faster read speed.
+9% 		469 MB/s
Write
Avg. Sequential Write Speed 		446 MB/s Faster write speed.
+13% 		396 MB/s
4K Read
Avg. 4K Random Read Speed 		30.4 MB/s 33.9 MB/s Faster random read.
+12%
4K Write
Avg. 4K Random Write Speed 		114 MB/s Faster random write.
+27% 		89.6 MB/s
Mixed
Avg. Sequential Mixed IO Speed 		435 MB/s Much faster mixed IO speed.
+30% 		334 MB/s
4K Mixed
Avg. 4K Random Mixed IO Speed 		30.4 MB/s 44.1 MB/s Much faster random mixed IO.
+45%
Peak Score 
+23%
Read
Peak Sequential Read Speed 		511 MB/s 515 MB/s +1%
Write
Peak Sequential Write Speed 		446 MB/s 488 MB/s Slightly faster peak write speed.
+9%
4K Read
Peak 4K Random Read Speed 		30.4 MB/s 43.6 MB/s Much faster peak random read.
+43%
4K Write
Peak 4K Random Write Speed 		114 MB/s 125 MB/s Slightly faster peak random write.
+10%
Mixed
Peak Sequential Mixed IO Speed 		435 MB/s Faster peak mixed IO speed.
+14% 		383 MB/s
4K Mixed
Peak 4K Random Mixed IO Speed 		30.4 MB/s 56.7 MB/s Hugely faster peak random mixed IO.
+87%
Value & Sentiment 
+8%
Market Share
Based on 76,161,441 SSDs tested
See market share leaders
User Rating
UBM User Rating 		50 % 54 % Slightly more popular.
+8%
Nice To Haves 
+112%
Age
Newest 		120+ Months 119 Months +1%
DQ Read
Peak 4K-64Thread Read Speed 		268 MB/s 388 MB/s Much faster peak deep queue read.
+45%
DQ Write
Peak 4K-64Thread Write Speed 		226 MB/s 361 MB/s Much faster peak deep queue write.
+60%
AS-SSD Total
AS-SSD Total Score 		921 Pts 1,280 Pts Much stronger server IO.
+39%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed 		72.7 MB/s 356 MB/s Hugely faster peak deep queue mixed IO.
+390%
ADQ Read
Avg. 4K-64Thread Read Speed 		268 MB/s 344 MB/s Faster deep queue read.
+28%
ADQ Write
Avg. 4K-64Thread Write Speed 		226 MB/s 282 MB/s Faster deep queue write.
+25%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed 		72.7 MB/s 295 MB/s Hugely faster deep queue mixed IO.
+306%
Specifications 
Capacity
Capacity 		400GB 256GB
Conclusion 
Average Bench 102%
Average Bench 102%
ADVERTISEMENT

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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