Question Slow read/write speeds with Crucial P1 1 TB M.2 SSD ?

Apr 29, 2021
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Hi, having run the CrystalDiskmark tests on my Crucial M2 NVME SSD, the read/write speeds seem far below where they should be, particularly write speeds which are sub 150mbs. I don't really know where to start troubleshooting so would appreciate any advice.

Edited with CrystalDiskmark test results:

Test 1

Test 2

My system specs are:

MSI Gaming Plus motherboard
Ryzen 7 3700x CPU
RTX 3080 GPU
16GB DDR4 3200 RAM
Crucial P1 1 TB M2 SSD
Windows 10
 
Last edited:

Aeacus

Glorious
Ambassador
Here are some thoughts about it:
  1. It is a poor NVMe SSD, review: https://www.tomshardware.com/reviews/crucial-p1-nvme-ssd-qlc,5852.html
  2. In the review, performance dropped considerably when it was 50% filled. To the equal levels of SATA SSD.
  3. Yours is 93% filled, where even greater performance drop takes place.
I too have Crucial SSD, but mine is SATA SSD, the MX500 1TB. After i bought it, i filled it to 81.5% capacity (since it was replacement/upgrade) and i ran the whole PC bench. In the results, my SSD, despite being only a day old, was performing way below expectations, since it was filled with data.
My PC bench results, if interested: https://www.userbenchmark.com/UserRun/8749818

So, if you want to have better performance, don't fill it up.
I keep minimum of 20% of drive capacity free, at all times. So, for 1TB drive, at least 200GB must be free.
 
Reactions: Wedzayblooz
Apr 29, 2021
6
1
10
0
Here are some thoughts about it:
  1. It is a poor NVMe SSD, review: https://www.tomshardware.com/reviews/crucial-p1-nvme-ssd-qlc,5852.html
  2. In the review, performance dropped considerably when it was 50% filled. To the equal levels of SATA SSD.
  3. Yours is 93% filled, where even greater performance drop takes place.
I too have Crucial SSD, but mine is SATA SSD, the MX500 1TB. After i bought it, i filled it to 81.5% capacity (since it was replacement/upgrade) and i ran the whole PC bench. In the results, my SSD, despite being only a day old, was performing way below expectations, since it was filled with data.
My PC bench results, if interested: https://www.userbenchmark.com/UserRun/8749818

So, if you want to have better performance, don't fill it up.
I keep minimum of 20% of drive capacity free, at all times. So, for 1TB drive, at least 200GB must be free.
Thank you for such a detailed reply. I did wonder whether the fact I had almost filled it was causing the low speeds, just didn't realise it would have such a large impact. Thank you for the reply
 
Reactions: Aeacus

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