SSDBoss Review Our evaluation of Extreme SSD vs 840

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

Passmark Disk Rating, 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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Faster 4k random write 119.02 MB/s vs 76.07 MB/s More than 55% faster 4k random write
Significantly faster 512K sequential write 507.56 MB/s vs 248.62 MB/s More than 2x faster 512K sequential write
Higher passmark rating 3,572 pts vs 2,563 pts Around 40% higher passmark rating
Higher MTBF 2,000,000 hours vs 1,500,000 hours Around 35% higher MTBF
Faster AS SSD ISO copy 418.97 MB/s vs 188.99 MB/s Around 2.2x faster AS SSD ISO copy
Lower 4k random write access time 2.1 ms vs 3.29 ms More than 35% lower 4k random write access time
Slightly higher PCMark vantage score 24,620 pts vs 23,328 pts More than 5% higher PCMark vantage score
Front view of Samsung 840

Reasons to consider the
Samsung 840

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Significantly faster 4k random read 303.68 MB/s vs 123.46 MB/s Around 2.5x faster 4k random read
Significantly larger cache 256 MB vs 0 MB Compared to all SSDs, 256 MB cache is just OK
Much lower avg. power consumption 1.69 Watts vs 2.68 Watts More than 35% lower avg. power consumption
Significantly lower 4k random read access time 0.82 ms vs 2.02 ms 2.5x lower 4k random read access time
Higher AS SSD score 1,010 pts vs 761 pts Around 35% higher AS SSD score
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 Samsung 840

4K Random Read

Extreme SSD
123.46 MB/s
Samsung 840
303.68 MB/s

4K Random Write

Extreme SSD
119.02 MB/s
Samsung 840
76.07 MB/s

Windows 7 Boot-up Time

Extreme SSD
9.6 s
Samsung 840
9.3 s

Avg. Power Consumption

Extreme SSD
2.68 Watts
Samsung 840
1.69 Watts

4K Random Read Access Time

Extreme SSD
2.1 ms
Samsung 840
3.29 ms

4K Random Write Access Time

Extreme SSD
2.02 ms
Samsung 840
0.82 ms

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