SSDBoss Review Our evaluation of 840 Pro vs PX-M5P

read performance

How quickly data is read from the drive

840 Pro
6.6
PX-M5P
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
PX-M5P
6.6
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
PX-M5P
8.0
Windows 7 Boot-up Time, Photoshop Lens Filter and AS SSD ISO Copy

Benchmarks

How well the drive performs on common benchmarks

840 Pro
6.9
PX-M5P
6.7
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 Samsung 840 Pro

Reasons to consider the
Samsung 840 Pro

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Faster 4k random write 130.58 MB/s vs 100.38 MB/s More than 30% faster 4k random write
Faster 4k random read 311.34 MB/s vs 240.51 MB/s Around 30% faster 4k random read
Faster 512K sequential write 499.3 MB/s vs 423.12 MB/s Around 20% faster 512K sequential write
Significantly lower avg. power consumption 2 Watts vs 2.71 Watts More than 25% lower avg. power consumption
Higher PCMark vantage score 25,929 pts vs 23,353 pts More than 10% higher PCMark vantage score
Lighter 53 g vs 70 g Around 25% lighter
Faster AS SSD ISO copy 429.47 MB/s vs 287.61 MB/s Around 50% faster AS SSD ISO copy
Higher passmark rating 3,921 pts vs 3,475 pts Around 15% higher passmark rating
Lower 4k random write access time 1.91 ms vs 2.49 ms Around 25% lower 4k random write access time
Slightly lower 4k random read access time 0.8 ms vs 1.04 ms Around 25% lower 4k random read access time
Front view of Plextor PX-M5P

Reasons to consider the
Plextor PX-M5P

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Much larger cache 768 MB vs 256 MB 3x larger cache
Significantly higher MTBF 2,400,000 hours vs 1,500,000 hours 60% higher MTBF

Benchmarks Real world tests of 840 Pro vs PX-M5P

4K Random Read

840 Pro
311.34 MB/s
PX-M5P
240.51 MB/s

4K Random Write

840 Pro
130.58 MB/s
PX-M5P
100.38 MB/s

Windows 7 Boot-up Time

840 Pro
7.8 s
PX-M5P
7.4 s

Avg. Power Consumption

840 Pro
2 Watts
PX-M5P
2.71 Watts

4K Random Read Access Time

840 Pro
1.91 ms
PX-M5P
2.49 ms

4K Random Write Access Time

840 Pro
0.8 ms
PX-M5P
1.04 ms

Reviews Word on the street

840 Pro  vs PX-M5P 

8.0
9.0
Not quite as effectively, it has to be said, as the Corsair Performance Pro, but a slapping none the less.
PX-M5P

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