Stefan Mileschin

The P3 Plus 4TB drive from Crucial is a good product to consider when aiming mostly at high-capacity and less on the speed, performing well as a mainstream drive. We noted that it does not get as hot as its 2TB counterpart but does still require placement in a well-ventilated chassis and covered by a heatsink provided by the computer motherboard. Using such drive in a laptop will surely max out the temperatures and besides a shorter lifespan, the drive will also perform less than desired, due to throttling.

http://www.madshrimps.be/articles/article/1001446/

jmke

hey Stefan,

during Amazon sales I bought a Crucial P3 (none plus) 4TB NVMe drive
installed in a machine with PCI NVMe slot, have a few other SSD SATA and NVMe Samsung drives also around.

What you experienced here:


is exactly what I saw too; also take a look at the drive activity in task manager when you see this sharp drop in performance.

like you had here


Thi is because Crucial is using: Micron 176 Layer 3D QLC NAND – Quadruple-Level-Cell ;
in order of performance , SSD Cells
SLC > MLC > QLC/QLC

the P3 and P3 Plus have NO dedicated DRAM cache, they will first write data first level SLC, once that is filled , will start going in the QLC and this is where you see the huge performance drop AND a huge increase in response times (3000ms+) and the disk I/O is at 100%. And this during a simple sequential write action.

My 10 year old SATA150 HDD has higher sequential write speeds than this NVMe SSD!

and once that I/O is at 100%, FULL system hang.
This drive should never be used as an OS Disk; and even as a scratch/data disk, seeing the performance drop; cannot really recommend it.


the 2TB Crucial P3 Plus is at €99 at Amazon.de
Samsung 970 Evo 2TB NVMe is at €98 at same shop

and that is a complete no brainer; the Samsung EVO 970 hold consistent NVMe PCI express levels of performance, not seeing ANY drops in performance as stellar as this Crucial one and I/O activity remains lower and latency is at <1ms, instead of 2000-3000ms I see with the Crucial NVMe

this is one drive to avoid in my humble opinion

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jmke

here is somebody with the exact same experience with Crucial P3 Plus

https://www.digitec.ch/en/page/why-i...this-ssd-25853

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jmke

my experience in one picture:

80Mb/s max write speeds;
Latency spikes, activity at 100%

Attached Thumbnails

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