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The PX M5P or Plextor M5 Pro series of SSDs are SATA III 6 Gbps drives that can reach maximum sequential read and write speeds of 540 MB/s and 470 MB/s respectively. This solid state drive is available in three capacities, namely 128 GB, 256 GB and 512 GB. Each capacity comes with DDR3 caches from 256 MB to 768 MB. The maximum 4k random read IOPS is 100,000 and the maximum 4k random write is 88,000, both achieved by the highest capacity variant.

The PX M5P supports different command sets including TRIM, S.M.A.R.T., and NCQ. Data encryption is also supported as well as firmware upgrade. Users will have 5 years of warranty throughout the 2,400,000 hours of life of this SSD. See also: Plextor M5S.


  • Sequential Read: Up to 540 MB/second
  • Sequential Write: Up to 470 MB/second
  • NAND type: MLC
  • Interface: SATA 3 6GBps
  • Controller:¬†Marvell 88SS9187
  • Form Factor: 2.5 inches
  • DRAM Cache: 512 MB (256 for 128 GB model)
  • Power Consumption (Active): 5W
  • Power Consumption (Idle): 0.1W
  • TRIM support: Yes
  • SMART support: Yes
  • Warranty: 5 years
  • MTBF: 2,400,000 hours

Part Numbers:

  • 128 GB: PX-128M5P
  • 256 GB: PX-256M5P
  • 512 GB: PX-512M3P

Price Comparison:

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Plextor delivers more than just great performance, however. The company has a reputation for quality that comes from its experience with optical storage. Although its SSDs are sourced from somewhere else entirely, the M5 Pro is still backed by five-year warranty coverage, which is something that can’t be said for many competing client-oriented drives.


The Plextor M5 Pro SSD really is an excellent SSD with excellent performance and reliability. The one Achilles heel will be sustained write performance at roughly 450 MB/sec — AS IF that is slow huh ? That number simply is below the competition. Realistically though, and we stated this many times, you’d never ever even notice the write difference as a split second write remains a split second write.


Despite not breaking any records, the M5 Pro is a good drive. Without any huge increases in performance via firmware updates however, the M5 Pro needs to be competitive on price. The M3 Pro wasn’t priced as aggressively as it needed to be, but with the M5 Pro Plextor has another chance.


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