SSDBoss Review Our evaluation of Extreme SSD vs 840 EVO

read performance

How quickly data is read from the drive

4K Random Read, 4K Random Read Access Time and 512K Sequential Read

write performance

How quickly data is written to the drive

4K Random Write, 4K Random Write Access Time and 512K Sequential Write

real world benchmarks

How well the drive performs common tasks

Windows 7 Boot-up Time, Photoshop Lens Filter and AS SSD ISO Copy

Benchmarks

How well the drive performs on common benchmarks

PCMark Vantage and AS SSD Score

No winner declared

Too close to call

Differences What are the advantages of each

Front view of SanDisk Extreme SSD

Reasons to consider the
SanDisk Extreme SSD

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Higher MTBF 2,000,000 hours vs 1,500,000 hours Around 35% higher MTBF
Sibling view of Samsung 840 EVO

Reasons to consider the
Samsung 840 EVO

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Much higher capacity 1,000 GB vs 240 GB Around 4.2x higher capacity
Much larger cache 1,000 MB vs 0 MB Compared to all SSDs, 1,000 MB cache is just OK
Significantly faster 4k random read 318.8 MB/s vs 123.46 MB/s More than 2.5x faster 4k random read
Higher AS SSD score 1,198 pts vs 761 pts More than 55% higher AS SSD score
Significantly lower 4k random read access time 0.78 ms vs 2.02 ms 2.6x lower 4k random read access time
Lighter 53 g vs 68 g More than 20% lighter
Thinner thickness 7 mm vs 10 mm Around 30% thinner thickness

Benchmarks Real world tests of Extreme SSD vs 840 EVO

4K Random Read

Extreme SSD
123.46 MB/s
840 EVO
318.8 MB/s

4K Random Write

Extreme SSD
119.02 MB/s
840 EVO
106.65 MB/s

Windows 7 Boot-up Time

Extreme SSD
9.6 s
840 EVO
9.3 s

Avg. Power Consumption

Extreme SSD
2.68 Watts
840 EVO
2.29 Watts

4K Random Read Access Time

Extreme SSD
2.1 ms
840 EVO
2.34 ms

4K Random Write Access Time

Extreme SSD
2.02 ms
840 EVO
0.78 ms

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