Question SK hynix Platinum P41 2TB SSD Write speed dropped by half

[Super Spartan]

Only about 4TB written to the SSD so far, when I first got it, the performance was:



Now, the write has dropped by about half:



the only difference which I think was different is I was on Windows 11 21H1 when I benchmarked it the first time and now I am on the latest 22H2. The read speeds are the same. What gives?

PS: I even tried using the Samsung NVMe modded drive but that didn't change the write speeds.
Antivirus is disabled while taking the test

Laptop specs are in my signature

 

[Pink Jazz]

I have been using mine for 6 months and still getting full read and write speeds. I don't use BitLocker, so I suspect BitLocker may have something to do with it.

 

[Super Spartan]

I have been using mine for 6 months and still getting full read and write speeds. I don't use BitLocker, so I suspect BitLocker may have something to do with it.

no, I never ever used BitLocker and never will.

 

[MKKKAO]

I ran into a similar problem with my work laptop, it's a Dell Precision 5470. The NVMe inside is an SK Hynix PC801, which I think is the OEM version of the P41. Initially, the read/write speeds were amazing, hovering around 6000-7000. But a while back, I noticed the write speed had dropped to about 2000-2500, though the read speed was still above 6500. The funny thing is, I found this out purely by accident. I wanted to run CrystalDiskMark on an external drive but ended up running it on the NVMe by mistake! Honestly, I probably wouldn't have noticed otherwise. There were no error messages or warnings, and everything else about the daily work on the laptop seemed normal.

I started looking around for any information on what could be wrong and found this forum, among other places, but didn't find any answers. And since it’s a work computer, RMA'ing it was off the table —not to mention how silly it would sound asking our IT department to look into it just because the NVMe drive doesn't perform well in benchmark!

But then things took a turn yesterday. I was using BitLocker on an external drive and saw a message saying, “Device encryption is temporarily suspended. Encryption will resume automatically the next time you restart this device.” Trying to fix this issue (of course restart did nothing), I ended up turning off the device encryption altogether. Then it hit me—could encryption be messing with the write speed? So, I ran CrystalDiskMark again and, bingo! the write speed was back to normal, over 6000.

Now, I’m left with a new puzzle: I can’t re-enable device encryption. Still, I wanted to share this in case it helps anyone out thereMY .

MY SSD is PC801 with same write 2500m/s issue, I try to disable the bitlocker after watching your post , but unfortunately problem still, so I think the problem is nothing about bitlocker, for your case should just a coincidence , there should be some logic that FW will prevent SSD to use Catch, im very struggle cus I just bought a P41, and it is still under delivery, I think I better to cancel the order right now.

 

[igor_kavinski]

I think I better to cancel the order right now.

Yes and get something decent like WD or Crucial or even Corsair. Kingston is also fine as far as I know.