SSDBoss Review Our evaluation of 840 Pro vs Vertex 4

read performance

How quickly data is read from the drive

840 Pro
6.6
Vertex 4
6.3
4K Random Read, 4K Random Read Access Time and 512K Sequential Read

write performance

How quickly data is written to the drive

840 Pro
7.0
Vertex 4
6.9
4K Random Write, 4K Random Write Access Time and 512K Sequential Write

real world benchmarks

How well the drive performs common tasks

840 Pro
8.1
Vertex 4
7.7
Windows 7 Boot-up Time, Photoshop Lens Filter and AS SSD ISO Copy

Benchmarks

How well the drive performs on common benchmarks

840 Pro
7.6
Vertex 4
7.4
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 Pro

Reasons to consider the
Samsung 840 Pro

Report a correction
Faster 4k random read 311.34 MB/s vs 236.97 MB/s More than 30% faster 4k random read
Larger cache 256 MB vs 24 MB Around 10.8x larger cache
Faster windows 7 boot-up time 7.8 s vs 9.7 s Around 20% faster windows 7 boot-up time
Lighter 53 g vs 101 g Around 50% lighter
Faster tom's storage bench application 733 pts vs 583 pts More than 25% faster tom's storage bench application
Higher passmark rating 3,921 pts vs 2,989 pts More than 30% higher passmark rating
Lower avg. power consumption 2 Watts vs 2.4 Watts More than 15% lower avg. power consumption
Faster AS SSD ISO copy 429.47 MB/s vs 263.19 MB/s Around 65% faster AS SSD ISO copy
Higher PCMark vantage score 25,929 pts vs 24,063 pts Around 10% higher PCMark vantage score
More capacity per dollar 1.83 GB/$ vs 1.04 GB/$ More than 75% more capacity per dollar
Thinner thickness 7 mm vs 9 mm Around 25% thinner thickness
Lower 4k random read access time 0.8 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 MTBF 2,000,000 hours vs 1,500,000 hours Around 35% higher MTBF

Benchmarks Real world tests of 840 Pro vs Vertex 4

4K Random Read

840 Pro
311.34 MB/s
Vertex 4
236.97 MB/s

4K Random Write

840 Pro
130.58 MB/s
Vertex 4
122.36 MB/s

Windows 7 Boot-up Time

840 Pro
7.8 s
Vertex 4
9.7 s

Avg. Power Consumption

840 Pro
2 Watts
Vertex 4
2.4 Watts

4K Random Read Access Time

840 Pro
1.91 ms
Vertex 4
2.04 ms

4K Random Write Access Time

840 Pro
0.8 ms
Vertex 4
1.06 ms

Reviews Word on the street

840 Pro  vs Vertex 4 

8.0
8.0
The random read/write performance data from SiSoft Sandra that we also quote is a measure of a drive's sustained performance when reading and writing a contiguous block of information to a randomly chosen location.
840 Pro

9.2
9.7
OCZ's Vertex 4 256 GB is currently available for $210, with an extra $10 rebate available.
Vertex 4

8.0
8.0
So the big difference in terms of performance you can likely trace to the flash memory in each drive.
840 Pro

Overall

8.7 Out of 10
8.7 Out of 10

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