SSDBoss Review Our evaluation of 840 vs Vertex 4

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


How well the drive performs on common benchmarks

Passmark Disk Rating, PCMark Vantage, AS SSD Score and 1 more

No winner declared

Too close to call

Differences What are the advantages of each

Front view of Samsung 840

Reasons to consider the
Samsung 840

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Larger cache 256 MB vs 24 MB Around 10.8x larger cache
Faster 4k random read 303.68 MB/s vs 236.97 MB/s Around 30% faster 4k random read
Lighter 53 g vs 101 g Around 50% lighter
Significantly lower avg. power consumption 1.69 Watts vs 2.4 Watts Around 30% lower avg. power consumption
More capacity per dollar 1.84 GB/$ vs 1.04 GB/$ More than 75% more capacity per dollar
Thinner thickness 7 mm vs 9 mm Around 25% thinner thickness
Slightly lower 4k random read access time 0.82 ms vs 1.06 ms Around 25% lower 4k random read access time
Front view of OCZ Vertex 4

Reasons to consider the
OCZ Vertex 4

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Higher capacity 512 GB vs 250 GB More than 2x higher capacity
Faster 4k random write 122.36 MB/s vs 76.07 MB/s More than 60% faster 4k random write
Significantly faster 512K sequential write 485.64 MB/s vs 248.62 MB/s More than 95% faster 512K sequential write
Faster tom's storage bench application 583 pts vs 469 pts Around 25% faster tom's storage bench application
Higher MTBF 2,000,000 hours vs 1,500,000 hours Around 35% higher MTBF
Lower 4k random write access time 2.04 ms vs 3.29 ms Around 40% lower 4k random write access time
Slightly higher passmark rating 2,989 pts vs 2,563 pts More than 15% higher passmark rating
Faster AS SSD ISO copy 263.19 MB/s vs 188.99 MB/s Around 40% faster AS SSD ISO copy

Benchmarks Real world tests of Samsung 840 vs Vertex 4

4K Random Read

Samsung 840
303.68 MB/s
Vertex 4
236.97 MB/s

4K Random Write

Samsung 840
76.07 MB/s
Vertex 4
122.36 MB/s

Windows 7 Boot-up Time

Samsung 840
9.3 s
Vertex 4
9.7 s

Avg. Power Consumption

Samsung 840
1.69 Watts
Vertex 4
2.4 Watts

4K Random Read Access Time

Samsung 840
3.29 ms
Vertex 4
2.04 ms

4K Random Write Access Time

Samsung 840
0.82 ms
Vertex 4
1.06 ms

Reviews Word on the street

Samsung 840  vs Vertex 4 

New dense NAND isn't quite as fast as established technology.
Samsung 840

OCZ's Vertex 4 256 GB is currently available for $210, with an extra $10 rebate available.
Vertex 4

Our actual test results are excellent and OCZ has clearly put in some legwork, but it will take sustained real-world usage for the OCZ Vertex 4's full colours to shine through as a result.
Vertex 4


8.3 Out of 10
8.7 Out of 10


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