How to Fix SK Hynix Platinum P41 SSD Slow Write Speed

SK Hynix Platinum P41 is a solid-state drive in the M.2 2280 form factor that boasts excellent sequential read and write speeds up to 7000MB/s and 6500MB/s respectively. However, lots of users notice the SK Hynix Platinum P41 SSD slow write speed issue on Windows 10/11, like the one from the Reddit forum:

SK Hynix Platinum P41 write speeds are extremely low. I noticed recently that my main SSD (SK Hynix P41 Platinum 1 TB) has write speeds that are much lower than expected. Any ideas for the problem?https://www.reddit.com/r/pcmasterrace/comments/15je57i/sk_hynix_p41_platinum_slow_write_speeds_2400_mbs/

According to user reports, the SK Hynix P41 2TB SSD low performance issue even occurs on a newly purchased one. The actual reason for the problem has not been confirmed, but I explored several proven troubleshooting methods. Let’s try them in order.

# 1. Test the SK Hynix Platinum P41 SSD Performance

Although the official website declaimed that the SK Hynix Platinum P41 SSD has very high read and write speeds, the situation may be completely different in reality. Do you want to get the exact speed of the SSD? I highly recommend you use MiniTool Partition Wizard, which can easily test the sequential/random read and write speeds on a disk.

MiniTool Partition Wizard FreeClick to Download100%Clean & Safe

Step 1. Launch MiniTool Partition Wizard to get its main interface and click on Disk Benchmark on the top toolbar.

Step 2. Select the drive letter of the SK Hynix Platinum P41 SSD from the drop-down menu, specify the test parameters, and click on the Start button. The larger the span of the transfer size, the longer the time this test will take.

Step 3. Wait for the test to complete and you will see the test results including transfer size, the sequential /random reading and writing speeds, and more.

# 2. Enable Large System Cache

Some users reported that the “SK Hynix Platinum P41 SSD slow write speed” issue can be solved by enabling the Large System Cache. Here you may have a try.

Step 1. Press the Win + R keys to open the Run box, type regedit in it, and press Enter >Yes.

Step 2. In the Registry Editor window, go to the following path via the left navigation bar.

HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control \Session Manager\Memory Management

Step 3. Select Memory Management from the left side, double-click LargeSystemCache to open the properties window, and set it to 0 for desktop mode or 1 for server mode. Then click OK to save the change.

Now, restart your computer and test to see if the Hynix Platinum P41 write speeds are extremely low.

# 3. Run Disk Cleanup on the SSD

As you know, SSD will be slower when it’s full. You can check the disk space for the SK Hynix P41 2TB SSD low performance. If it’s full, running Disk Cleanup can help free up some disk space on the SSD.

Step 1. Type cleanup in the Windows search bar and select Disk Cleanup from the top result.

Step 2. Select a drive from the drop-down menu and click OK.

Step 3. Wait for the calculation to complete. Select all boxes next to the items you want to clean up and click OK.

Step 4. Click Delete Files to confirm the operation. Alternatively, you can uninstall some programs or delete all junk files to free up the SSD. Once done, check if the SK Hynix P41 SSD write speeds dropping gets solved.

# 4. Securely Erase the SSD

In addition, you can try securely erasing the SSD to fix the “SK Hynix Platinum P41 SSD is slow” issue on Windows 10/11. This can revert your SSD to its original state. How to do that? I recommend you use a free SSD eraser – MiniTool Partition Wizard. It can erase an SSD with 5 high wiping levels, such as Fill Sectors with Zero & One, and DoD 5220.22-M wipe.

MiniTool Partition Wizard FreeClick to Download100%Clean & Safe

Step 1. In the main interface, select the SK Hynix SSD and click Wipe Disk from the left action panel.

Step 2. In the pop-up window, select your desired wiping level and click on OK. The higher level you select for wiping, the more time it will take.

Step 3. Click on the Apply button to execute the secure erase. After that, the problem of “SK Hynix Platinum P41 write speeds are extremely low” should be solved.

# 5. Perform a Clean Install of Windows 10/11

If none of the solutions can fix SK Hynix Platinum P41 SSD slow write speed, you may need to clean install the Windows OS. The process will delete everything on the SSD and create a fresh installation of Windows, which can help fix the problem. Bear in mind that you should back up all important data before doing.

Bottom Line

In a nutshell, this post mainly discussed how to fix SK Hynix P41 2TB SSD low performance on Windows 10/11. You can benchmark the SSD using MiniTool Partition Wizard and try the above methods to solve the problem. Besides, you can share this blog in your communities.