SSDBoss Review Our evaluation of 840 vs PX-M5P

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 Samsung 840

Reasons to consider the
Samsung 840

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Faster 4k random read 303.68 MB/s vs 240.51 MB/s More than 25% faster 4k random read
Much lower avg. power consumption 1.69 Watts vs 2.71 Watts Around 40% lower avg. power consumption
Lighter 53 g vs 70 g Around 25% lighter
Slightly lower 4k random read access time 0.82 ms vs 1.04 ms More than 20% 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
Higher capacity 512 GB vs 250 GB More than 2x higher capacity
Faster 4k random write 100.38 MB/s vs 76.07 MB/s More than 30% faster 4k random write
Faster windows 7 boot-up time 7.4 s vs 9.3 s More than 20% faster windows 7 boot-up time
Significantly higher MTBF 2,400,000 hours vs 1,500,000 hours 60% higher MTBF
Higher passmark rating 3,475 pts vs 2,563 pts More than 35% higher passmark rating
Faster sequential write 470 MB/s vs 330 MB/s More than 40% faster sequential write
Lower 4k random write access time 2.49 ms vs 3.29 ms Around 25% lower 4k random write access time
Faster AS SSD ISO copy 287.61 MB/s vs 188.99 MB/s More than 50% faster AS SSD ISO copy

Benchmarks Real world tests of Samsung 840 vs PX-M5P

4K Random Read

Samsung 840
303.68 MB/s
PX-M5P
240.51 MB/s

4K Random Write

Samsung 840
76.07 MB/s
PX-M5P
100.38 MB/s

Windows 7 Boot-up Time

Samsung 840
9.3 s
PX-M5P
7.4 s

Avg. Power Consumption

Samsung 840
1.69 Watts
PX-M5P
2.71 Watts

4K Random Read Access Time

Samsung 840
3.29 ms
PX-M5P
2.49 ms

4K Random Write Access Time

Samsung 840
0.82 ms
PX-M5P
1.04 ms

Reviews Word on the street

Samsung 840  vs PX-M5P 

7.0
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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