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Plextor M5 Pro Xtreme 256GB / M5S 256GB SSD review: one is cheap, the other faster?

One is cheaper, but is the other one faster?

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Atto Disk Benchmark

The Atto Disk Benchmark reads and writes data blocks of different sizes as quickly as possible to random places on the SSD. We used the 4kB and 1MB tests. The 4kB tests reflect working with very small files, resembling what happens when starting up software. The 1MB test are a best-case scenario for SSDs and indicate what type of performance you can expect when working with large files, such as copying digital photos, MP3s, and films.

Four commands are simultaneously sent to the disks each time. Since the flash chips in SSDs are parallel controlled, smart controllers can execute multiple commands at once. This improves the performance. In real-life, Windows and other software will also simultaneously send multiple commands to the drives.

Please note: Atto Disk Benchmark uses compressible data. Many files - especially program files - are like this. However, files such as digital photos, MP3s, or films are barely compressible or not compressible at all. The AS SSD benchmark on the next page provides a clearer picture.

4 read

4k write

1MB read

1MB write

Compare

two products discussed in this review

  Product Lowest price
Plextor M5 Pro 256GB
REVIEW

SSD, 256 GB, 0 rpm, Serial ATA 600, Marvell 88SS9187, 540 MB/s, 450 MB/s, 2.5 inch

Specifications Test results Reviews Prices

£113.81

Avg. £113.81
2 shops, 2x stock

Plextor M5S 256GB
REVIEW

SSD, 256 GB, 0 rpm, Serial ATA 600, Marvell 88SS9174, 520 MB/s, 390 MB/s, 2.5 inch

Specifications Test results Reviews Prices

£124.15

Avg. £124.15
1 shop, 1x stock


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