SSD NVMe drop in write speed

Question

I bought a Corsair Force MP510 NVMe SSD 480 Go 4 months ago, it was such a breeze with significant high read/write speed and the benchmark was as announced in CrystalDiskMark7 (I had 3,3GB/s (3.5 in spec) on reading and 2,9GB (3 in spec) on writing)

After this 4 months and a 81% filling of the disk, my speed are now significantly slower, notably writing

My whole config is as such : Ryzen 5 3700X, X570 mobo, 32Go DDR4 3200Mhz RAM, AMD RX5700 XT Graphics, another SSD in SATA and I'm on Windows 10 last update

I've digged throught the internet and tried many things :

• Disabling and Reenabling disk cache in Windows Drivers -> Storage -> Policy
• Updating my BIOS to the latest
• Swaping the disk from M.2 slot in my mobo (I have 2), same results
• Reinstalling my AMD Chipset Driver
• Enabling only AHCI Disk drivers and disabling others
• Booting Windows in selective modes with only signed drivers (with verifier) and only Microsoft services
• Free up disk space to let atleast 15% of the total
• Ran Optimized Volume on the drive
• Check if TRIM is enabled
• Check first offset of partition to see if sectors are aligned (it is)
• Check SMART status of the disk and firmware update (was already the latest)
• Check temperature of the disk, seems ok with around 48°c on idle and 57°C at max on very high load

So I came to you wondering what I could do next, as this low write speeds is affecting my work (I'm a software developer) and tried so much things I can't count, last thing being to reinstall a fresh Windows but that's not an option right now

Solution

1. Use this tool to solve some of the problems in your NVMe: Corsair SSD Toolbox
2. Wipe your deleted old data in your NVMe/SSD: CCleaner
3. Run/Start your operating system on Safe Mode, then test your NVMe speed, if it does run normally, then there is a specific software causing the problem.
4. Check which software is causing the problem with: Process Explorer

Comments

[K7AAY]

1) Write speed drops after the first 20% of the disk space is filled, although I've never seen it that drastic. 2) Make sure TRIM is enabled after updating their SSD Toolbox to the latest version. 3) forum.corsair.com/v3/forumdisplay.php?f=188shows you're not the only one with such problems; also see forum.corsair.com/v3/showthread.php?t=189618 . 4) Have you consulted Corsair support? What did they say?

[Plotisateur]

If this TRIM procedure is the right procedure to check if TRIM is enabled then it is. Didn't contact Corsair support already as I was pretty sure it's not hardware related, but seeing the Corsair forum I'd reconsiderate...Trying another benchmark after freeing more space

[Plotisateur]

I tried by cleaning my files a bit and freeing up space (now 36% is free), sadly nothing changed at all for write speed...

[K7AAY]

Then it's time for #4. help.corsair.com/hc/en-us/requests/new en Anglais seulement, malheureusement.

[Lawyer Aidroos]

I had the same issue on INTEL 390 series top end board, and it was resolved by installing the latest optane memory drivers, setting everything related to cache as default.

[Nottingham Man]

I have the same problem with SAMSUNG MVME... i made test where it went up to 2139MB/s write, and the next day, 3 tests only get under 1000! Don't understand this...

[Plotisateur]

Yes sorry, updated my post with this info, I tried with SSD Corsair Toolbox and it was already the latest

[Walter Solano]

i have edited the anwer, check the second solution