If you’ve ever opened a game or graphics-heavy application only to see stuttering, frame drops, or low performance warnings, chances are your system doesn’t have enough VRAM (Video RAM). The good news? On Windows 10 and Windows 11 PCs, you can manually increase VRAM through a simple Registry tweak—without touching your BIOS.
This guide will walk you step by step through the process, explain recommended values, and show you how to double-check the changes afterward. Whether you’re on Intel, AMD, or Nvidia integrated graphics, these steps work universally.
1️⃣ What is VRAM and Why Increase It?
VRAM (Video Random Access Memory) is a portion of your system’s memory reserved for rendering graphics. Games, 3D design tools, and even high-resolution video playback depend on VRAM to run smoothly.
If you’re using integrated graphics (Intel UHD, AMD Radeon iGPU, etc.), Windows allocates a very small chunk by default. Manually increasing it allows the GPU to use more system RAM, which improves performance and reduces stutter in games.
2️⃣ Check Your Current VRAM
Before making any changes, let’s see how much VRAM your system currently uses.
- Right-click your Desktop → choose Display Settings.
(Windows 11: click “Show more options” if you don’t see it immediately.) - Scroll down → click Advanced Display Settings.
- Select Display Adapter Properties for Display 1.
- Under Adapter, check:
- Dedicated Video Memory (default VRAM size)
- Total Available Graphics Memory
👉 Example: On a 16GB RAM system, you may see only 128MB dedicated VRAM. That’s what we’ll change.
3️⃣ Recommended VRAM Values
Here’s a safe range of VRAM values you can assign based on your installed RAM:
| System RAM | Recommended VRAM |
|---|---|
| 1 GB | 128 MB |
| 2 GB | 256 MB |
| 4 GB | 512 MB |
| 8 GB | 2048 MB (2 GB) |
| 12 GB | 3072 MB (3 GB) |
| 16 GB | 2048–4096 MB |
| 24 GB | 6144 MB (6 GB) |
| 32 GB | 8192 MB (8 GB) |
⚠️ Don’t assign too high a value—this can cause instability. Stick within these ranges.
4️⃣ Open and Navigate Registry Editor
Now let’s tweak the settings.
- Press Win + S, type Registry Editor, and right-click → Run as Administrator.
- Navigate to:
HKEY_LOCAL_MACHINE\Software\Intel(If you’re on AMD or Nvidia integrated graphics, look under their folder instead.)
5️⃣ Create GMM Key and DedicatedSegmentSize
- Inside your graphics manufacturer’s folder (e.g., Intel):
- Right-click → New → Key → name it GMM (uppercase).
- Select the new GMM folder.
- On the right side → Right-click → New → DWORD (32-bit) Value.
- Name it:
DedicatedSegmentSize(Note the capital D, S, and no spaces.)
6️⃣ Match Value to Your RAM Size
- Double-click DedicatedSegmentSize.
- Choose Decimal as the base.
- Enter the VRAM value based on your RAM (see table above).
- Example: If you have 16GB RAM, enter 2048 (for 2GB VRAM).
- Click OK to save.
7️⃣ Restart and Verify
- Restart your PC.
- Go back to Display Adapter Properties → check if your Dedicated Video Memory has updated.
You should now see higher VRAM, which helps in games and GPU workloads.
8️⃣ Update Your Graphics Drivers (Optional)
While you’re at it, update your drivers for the best results:
- Right-click Start → Device Manager.
- Expand Display Adapters.
- Right-click your GPU → Update Driver → Search automatically for drivers.
- If Windows says the best driver is installed, download the latest from:
9️⃣ FAQs
Q1. Will this trick work on dedicated GPUs like GTX or RTX cards?
👉 No. Dedicated GPUs have fixed VRAM (GDDR memory) that cannot be changed. This tweak only applies to integrated graphics.
Q2. Is it safe to increase VRAM using Registry?
👉 Yes, as long as you stick to recommended values. Setting extreme values may cause crashes.
Q3. Why doesn’t my VRAM show exact numbers after restart?
👉 Windows sometimes still reports old values, but applications/games detect the new allocation. Performance should still improve.
Q4. Can I use BIOS instead of Registry Editor?
👉 Some BIOS versions allow VRAM adjustment. But if the option is missing, this Registry method is the alternative.
⚠️ Disclaimer
This guide is intended for educational purposes. Modifying the Registry incorrectly may cause system issues. Always back up your Registry before making changes. Perform these steps at your own risk.
✅ You’re all set! Your PC now has more VRAM assigned for gaming and graphics tasks.
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