We reviewed the Plextor M9PeG not long ago, actually. But then again, Plextor released the M9Pe series of NVMe SSD in a total of 3 different variants – an M.2 without heatsink, another M.2 with a heatsink, and also in HHHL form factor with a massive heatsink. The M9PeY is the HHHL form factor in the family, and we’re here to test out how it performs.


Since SSDs have different theoretical maximum read and write speeds depending on the capacity, the specs listed below here is for the 512GB variant.


Sequential Read SpeedUp to 3,200 MB/s
Sequential Write SpeedUp to 2,000 MB/s
Random Read SpeedUp to 340,000 IOPS
Random Write SpeedUp to 280,000 IOPS

Environment and Reliability

Power RequirementDC 12V 1.0A (Max.) at PCIe Slot
Temperature0°C ~ 70°C / 32°F ~ 158°F (Operating)
Shock1500G (Max.), at 1 msec half-sine
MTBF>1,500,000 Hours
Endurance (TBW)320
Warranty5 years


Operating System SupportedMicrosoft Windows 8.1, 10/ Linux OS
Command Set SupportTRIM, S.M.A.R.T, IO queue, NVMe command
InterfaceM.2 PCIe Gen 3 x4 with NVM Express
Firmware UpgradeSupported

Form Factor and Connectors

Form FactorStandardized PCl Express Card with Half-Height/Half-Length
Power ConnectorDC 12V PCI Express Slot
Data ConnectorPCI Express Slot

Dimension and Weight

Dimension (L/W/H)176.33 X 121.04 X 22.39 mm / 6.94 X 4.77 X 0.88 inch
Weight (Max.)200g / 7.05oz

Package Contents

Drive256GB / 512GB / 1TB SSD
AccessoryHalf-Height Bracket
DocumentsQuick Installation Guide


In comparison with the previous generation of Plextor NVMe SSD, the M9PeY comes in a rather classy black and red theme box with a colorful eye design.

Plextor M9PeY
Goes to show how big the Plextor M9PeY’s box is.

At the back is where we can see the list of specs of the M9PeY, which is handy if you’re picky this up at a retail store. I appreciate the amount of technical details that Plextor puts to the packaging.

Plextor M9PeYOpening up the packaging, the overall style and unboxing flow is pretty similar to the previous generation. We get the same exact slew of accessories and plastic bracket with the cover too.

Upon further analysis, Plextor has also used the same heatsink design as the previous generation. Aesthetically, the white-on-blue Plextor logo has became white-on-red instead. In the gaming industry, red always means “faster” or “gamery”, am I right?

Plextor M9PeYAt the back of the Plextor M9PeY, it remains the same as the previous generation.

Plextor M9PeYHowever, at the side, this is where the big change is found – an RGB light strip which actually functions as the SSD activity light as well. In idle, the RGB will cycle through the colors, but once it’s under load, the RGB goes into psychedelic mode and shines in color wave pattern.


Like any other PCIe card device, you’ll need to plug it into the available slots. Our test machine has a spare PCIe x8 for the second GPU, which we can plug the Plextor M9PeY into.

Do note that depending on chipset, plugging a PCIe Gen.3 x4 NVMe SSD into the the PCIe x8 slot might cause your GPU to function in x8 mode instead of x16. This is what we discovered while testing the M9PeY.

Once we got the Plextor M9PeY installed and working in full PCIe 3.0 x4 lanes, we booted into Windows and turned off Windows write-cache buffer flushing.We’re doing this only for SSD review purpose, and we do not recommend turning off Windows write-cache buffer flushing as it increases the chance of data loss in case of power loss.

Review - Plextor M9PeY PCIe Gen.3 x4 NVMe SSD 1

Since the launch of the M9Pe series of NVMe SSDs, the PlexTool 2.0 software has finally been released – but it doesn’t actually do much. The software only gives you status on the Plextor M9PeY and to check if there are any firmware upgrades available. There is zero control over how the RGB works.

Synthetic Benchmarks

AS SSD Benchmark

Widely used SSD benchmarking utility that uses incompressible data to simulate the worst possible scenario for an SSD and thus giving a much lower sequential read and write speed result than what has been stated by the manufacturer as result of the heavy workload.

Plextor M9PeY AS SSD benchmark


Developed by a Japanese coder that goes by the nickname Hiyohiyo, CrystalDiskMark is one of the most frequent used SSD Benchmark utility to measure SSD’s read and write performance.

ATTO Disk Benchmark

The most frequently used benchmarking utility by many manufacturers for performance specification. As ATTO Disk Benchmark uses compressible data rather than incompressible data, it results in higher benchmark scores.

Plextor M9PeY Anvil benchmark

Real World Performance

The Plextor M9PeY is a speed demon – that’s for sure. From what we tested, the M9PeY is faster than everything else we have in our lab – and we achieved near 1GB/s transfer sped while copying data from the previous generation M8SeGN to the M9PeY.

Copying data from Plextor M8PeGN to Plextor M9PeY
Copying data from Plextor M8PeGN to Plextor M9PeY

We also copied data from the Plextor M9PeY to a hard disk and to another SATA III SSD. Needless to say, the M9PeY’s speed far exceeds them.

Copying data from Plextor M9PeY to SATA III SSD
Copying data from Plextor M9PeY to SATA III SSD
Copying data from Plextor M9PeY to HDD
Copying data from Plextor M9PeY to HDD


Having another hard in your system might not be a compelling option – and it eats up another PCIe slot although Plextor makes it a compelling option by offering RGB. The speed it offers is surely great for everyday use and currently, there are no other drives in our lab that can come close to the Plextor M9PeY’s speed – or the entire M9Pe family of NVMe SSD for that matter.

The large heatsink does prevent thermal throttling – and you can actually void your warranty and take out the M.2 SSD that is buried inside the card – and you essentially get the Plextor M9PeGN – the barebones M.2 version.

For now, we can’t find the online pricing for the Plextor M9PeY, but we expect it to be more expensive than the M9PeY – which is priced at $219.99.


  • Excellent performance
  • Uses 3D TLC NAND flash
  • Massive heatsink
  • Has 5-year warranty


  • Need to be careful with the chipset of your motherboard

Tech Critter Gold


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