Differences What are the advantages of each

Front view of SanDisk Ultra II

Reasons to consider the
SanDisk Ultra II

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Higher MTBF 1,750,000 hours vs 1,500,000 hours More than 15% higher MTBF
Sibling view of Samsung 840 EVO

Reasons to consider the
Samsung 840 EVO

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Slightly higher capacity 1,000 GB vs 960 GB Around 5% higher capacity

Specifications Full list of technical specs

storage

Ultra II  vs
840 EVO 
Capacity 960 GB 1,000 GB
Interface SATA III SATA III
Interface speed 6 Gbit/s 6 Gbit/s
Controller Marvell 88SS9187 Samsung MEX
Memory type MLC TLC

form factor

Ultra II  vs
840 EVO 
Form factor 2.5" 2.5"
Thickness 7 mm 7 mm

manufacturer performance

MTBF 1,750,000 hours 1,500,000 hours

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