Windows 10: Why is the write speed of NVMe PCI-E 3.0 SSD falling, although the read speed remains ~ the...

Greetings. For 2 years I have not been able to understand what the problem is with the drop in write speed on different NVMe PCI-E 3.0 SSDs. The bottom line is that the read speed remains approximately the same it may drop by 200-300 MB/s, it does not look so critical, but the write speed drops 8 times it was 2500-2400, it became 500-600. After reinstalling the OS, everything, of course, gets better, but for the time being. My question is how to find the instigator of this problem, because DISM, SFC could not find and solve the problem. I just want to solve this problem by NOT reinstalling

:)

 

slow nvme speeds 500mb/s write

I have a storage setup comprising 20TB of SSD storage, including 3 NVMe SSDs and 5 additional SSDs. The 5 SSDs are configured in RAID 0, achieving approximately 2000MB/s read/write speeds. Similarly, the 2 NVME SSDs, rated at 5000MB/s each, are set up in RAID 0, reaching around 10000MB/s read/write speeds using Windows 11's software-based RAID 0 functionality.

One of my NVMe SSDs, a standalone 2TB module directly connected to the CPU for low latency, is rated at 7500MB/s read/write speeds. Upon initial Windows installation, the NVMe SSD performed admirably, achieving the expected 7500MB/s read and write speeds. However, after configuring the system and installing Bitdefender, among other applications, I've noticed a significant drop in write speeds. Presently, the write speeds struggle to surpass 2000MB/s.

I've tried troubleshooting by uninstalling Bitdefender and other applications, yet the issue persists. Could this be related to a Windows 11 update or perhaps a configuration issue? I appreciate any insights or suggestions to help resolve this matter.

Single NVME 7500mb/s

• 
  
  
  
  Dual NVME in Windows 11 Software Raid 0
  
  
  
  
  x5 SSDs in Windows 11 Software Raid 0
  
  
  
  
  Keypoints,
  - Windows 11 Defender is completely uninstalled,
  - Bitdefender (my anti-virus) is completely uninstalled,
  - Windows 11 fresh installation,
  - No bios limitations,
  - The same drive (C achieved those advertised speeds using benchmarks on bootable linux.
  
  I would greatly appreciate some heads up here, I have been fighting trying to understand what the issue is.
  
  Thank you so much for your time.
  

 

Slow HDD read and write speeds

Hi,

Thank you for writing to Microsoft Community Forums.

We will require a few more information from you to help you further with the issue. Please reply with the following details:

• In which device are you facing this issue?
  
• Are you using an external HDD or internal HDD?
  
• Are you getting the read and write speed issue on any particular application?
  

However, you can Disk Defragment on your computer to optimize the drive. To run Disk Defragment please follow the steps from the article

Defragment your Windows 10 PC.

Alternatively, you can check for the read and write speed of the HDD in task manager. Please follow the steps mentioned below to check the read and write speed of the hard drive:

1. Press Ctrl + Shift + Esc key together on the keyboard.
   
2. Click on Performance tab.
   
3. Click on Disk 0.
   
4. You will find the Read speed and
   Write speed at the bottom of the window.
   

Hope it helps.

Please reply with the status of the issue, we will be glad to help you further.

Nikhar Khare

Microsoft Community - Moderator

 

Increase the read / write speed of an external hard drive

The speed of read/write mainly depends on the hardware and external hard disk itself. For example in case if you use SSD with USB-3 it would have greater speed.

Do you have any specific suggestion on improving the speed?

Windows team are working to make sure performance as one of key quality of factor is improving in all aspects of Windows 10.