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Verifiedintermediateest. 20 minutes

Fix Shader Compilation Stuttering in PC Games

Massive stutters and frame drops occur when entering new areas or loading new assets in modern PC games.

stutteringshadersunreal-engineperformance

Confirmed working on: Windows 10 · Windows 11

Before you begin

Match the environmentUse this guide only for Windows 10, Windows 11 or a clearly compatible setup.
Protect recoveryBack up important data and save encryption or account recovery keys before changing system state.
Know when to stopMake one change at a time and stop if the result differs from what the guide describes.

Problem overview

Modern PC games (especially Unreal Engine titles) suffer from severe stuttering and sudden frame drops when you enter new areas or load new assets. This is often caused by the game trying to compile shaders in real-time.

Common causes

  • The game engine compiling shaders on the fly rather than pre-compiling them
  • Outdated GPU drivers lacking specific game optimizations
  • Missing Resizable BAR (ReBAR) or Smart Access Memory support
  • High tessellation or texture settings overwhelming the GPU

Solution 1: Allow pre-compilation to finish

  1. Launch the game and stay on the main menu.
  2. Look for a “Compiling Shaders” progress bar or message.
  3. Wait for this process to reach 100% before starting or loading your save.
  4. If your game has a specific setting for DirectX 12 Shader Pre-Compilation, ensure it is enabled.
Expert Tip

If you update your GPU driver, the game will need to recompile shaders the next time you open it. This is normal.

Solution 2: Enable ReBAR / Smart Access Memory

  1. Restart your PC and press F2 or Delete repeatedly to enter the BIOS.
  2. Navigate to the Advanced or PCIe Subsystem Settings tab.
  3. Locate Above 4G Decoding and enable it.
  4. Locate Resizable BAR Support (or Smart Access Memory for AMD) and set it to Auto or Enabled.
  5. Save your settings and exit the BIOS.

Solution 3: Adjust in-game graphics settings

  1. Go to the in-game Settings menu.
  2. Reduce the Tessellation setting to low or medium.
  3. Switch from DirectX 12 to DirectX 11 or Vulkan if the option is available, as these APIs handle shaders differently.
  4. Restart the game to apply the API change.
Caution

Switching from DX12 to DX11 might disable features like Ray Tracing or DLSS 3 Frame Generation in some games.

Confirm the result

  1. Repeat the exact action that originally triggered the problem.
  2. Confirm the original error or symptom is gone and no new warning has appeared.
  3. If the guide changed a driver, service, package, or system setting, restart once and test again.
  4. If the result is worse or unexpected, stop. Reverse only the last change using its documented restore option; if none is documented, use your backup or qualified support.

Questions about this fix

What is shader compilation?

It is the process where your GPU translates game code into a format it understands to render graphics.

Why does it cause stuttering?

If the game compiles shaders on the fly during gameplay instead of beforehand, it stalls the frame rendering.

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