However, some users still struggle with lagging, stuttering, and low FPS.
These issues can be sparked by system tweaks, graphics card drivers, or other unknown factors.
Here are a couple of useful workarounds for you to fix the Assassins Creed Shadows DX12 error 0x80070057/0x887A0005/0x887A0006.
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How to Fix Assassins Creed Shadows Performance Issues
Fix 1.
Some users reported that this alone increased the FPS to 60-70 without any lag.
So, you could give it a try.

For Windows 10:
Step 1.
TypeGraphics settingsin the Windows search box and pressEnterto open it.
In the Graphics configs menu, toggle on theHardware-Accelerated GPU Schedulingoption.
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For Windows 11:
Step 1.
PressWindows + Ito open options.
Navigate toSystem>Display>Graphics.

Then clickChange default graphics settingsand enableHardware-Accelerated GPU Scheduling.
Fix 2.
Set the Game to Run in High-Performance Mode
Step 1.
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Go to the graphics configs page.
Click your game from the app list and chooseOptions.
Choose theHigh performanceoption in the Graphics preference window.
Fix 3.
In this case, you might try a temporary solution.
Next, close that game and launch Assassins Creed Shadows to see if the FPS improves.
Fix 4.
Right-click theStartbutton and chooseDevice Manager.
ExpandDisplay adapters, right-click your display machine, and chooseProperties.
Go to theDrivertab and clickRoll Back Driver.
Here are some proven workarounds you’re able to try.
However, if all of them fail to work, you may need to upgrade your rig hardware.