Boost Windows 11 25H2 SSD Speed? I Tested the NVMe Registry Trick

Microsoft recently introduced a native NVMe driver in Windows Server 2025, promising major improvements in storage performance, especially for NVMe and M.2 SSD drives.Soon after this announcement, advanced users discovered that this feature could be experimentally unlocked on Windows 11 25H2 using specific registry tweaks — even though Microsoft has not officially announced support for Windows 11 Home or Pro.

In this article, I share real test results, explain how the tweak works, and most importantly, show what actually makes the biggest difference for SSD performance on Windows 11.

Comment
byu/anestling from discussion
inwindows

Microsoft Official Post
Windows Server News and Best Practices

---

Important Disclaimer (Read First)

This NVMe registry tweak is:

• ✅ Officially documented ONLY for Windows Server 2025

• ❌ NOT officially supported by Microsoft on Windows 11 Home or Pro (if you see the video it’s working perfectly in my pc)

You can test it at your own risk.
Always benchmark before and after making any changes.

---

What Is the Native NVMe Driver in Windows Server 2025?

Microsoft redesigned the NVMe storage stack in Windows Server 2025 to reduce overhead and improve I/O efficiency.

According to early tests and discussions:

• NVMe IOPS can improve significantly

• Random 4K performance may increase

• Latency is reduced in some workloads

This is especially relevant for:

• Servers

• Virtualization

• Heavy multitasking

• High I/O workloads

But the big question is:

👉 Does it actually help on Windows 11 25H2?

---

My Test Setup

Here’s exactly how I tested it:

• OS: Windows 11 25H2 (Home / Pro compatible)

• SSD: NVMe M.2 (HP EX900 Plus 1TB)

• Benchmark Tool: CrystalDiskMark

• Test Focus:

  • Sequential Read / Write

  • 4K Random Q32T1

  • 4K Random Q1T1 (most important for real-world use)

---

Why 4K Random Performance Matters

Many people focus only on sequential speeds, but that’s misleading.

🔹 RND4K Q32T1

• Measures how well the SSD handles many small requests at the same time

• Important for multitasking and server-like workloads

🔹 RND4K Q1T1 (Most Important)

• Measures responsiveness for:

  • Opening apps

  • Booting Windows

  • General system speed

If you want Windows 11 to feel faster, this is the metric that matters most.

---

Baseline Test (Before Any Tweaks)

Before applying any registry changes, I ran CrystalDiskMark with:

• Default profile

• 1GB test size

• My C: drive was 92% full

⚠️ This detail is extremely important — and most videos ignore it.

Result:

• Very poor 4K Random write performance

• Unbalanced SSD behavior

---

The NVMe Registry Tweaks (Tested)

Advanced users discovered that these registry keys can unlock the Server NVMe path:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Policies\Microsoft\FeatureManagement\Overrides

I tested this in two ways:

• Via PowerShell commands:
  Paste this into powershell:
  

  reg add HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Policies\Microsoft\FeatureManagement\Overrides /v 1853569164 /t REG_DWORD /d 1 /f
  reg add HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Policies\Microsoft\FeatureManagement\Overrides /v 156965516 /t REG_DWORD /d 1 /f
  reg add HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Policies\Microsoft\FeatureManagement\Overrides /v 735209102 /t REG_DWORD /d 1 /f

  Via .reg files (Enable + Disable / Rollback)

After applying the tweaks and restarting Windows:

• NVMe drives moved under Storage Disks in Device Manager

• NVMe disk type was correctly recognized

• Microsoft NVMe driver was active

This confirms the registry tweak does something real.
Download NVMe Registry Tweaks 

• NVMe-Registry-Tweaks

No PowerShell knowledge required.

---

Performance Results After the NVMe Tweak

After reboot and re-testing:

✅ Write speeds improved significantly
✅ 4K Random performance increased
⚠️ Results varied depending on disk usage

On my system:

• NVMe performance became more balanced

• Write performance improved dramatically

• 4K Random metrics were higher than before

So yes — on my system, the tweak made a real difference.

---

💡 Bonus Tip: The BIGGEST SSD Performance Killer

Here’s the most important lesson from this test:

👉 A nearly full C: drive destroys SSD performance.

After freeing disk space and re-running the same benchmark:

• Performance improved more than the registry tweak alone

• 4K Random write speeds increased significantly

• Overall system responsiveness felt much faster

📌 Free space matters more than hidden tweaks.

---

Final Verdict

✔ The NVMe registry tweak does work on some Windows 11 25H2 systems
✔ It is NOT officially supported
✔ Results vary by hardware and disk usage
✔ Free disk space has a bigger impact than most registry hacks

Best practice:

1. Benchmark your SSD

2. Free disk space (aim for <70% usage)

3. Test again

4. Only then experiment with NVMe tweaks