UE5.6 crashes immediately on startup

Development Platform & Builds
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1

When I load up UE5.6, it crashes with the following error:

Fatal error: [File:D:\build\++UE5\Sync\Engine\Source\Runtime\D3D12RHI\Private\D3D12Util.cpp] [Line: 1015] 
Payload->Queue.D3DCommandQueue->GetClockCalibration(&LocalTiming->GPUTimestamp, &LocalTiming->CPUTimestamp) failed 
at D:\build\++UE5\Sync\Engine\Source\Runtime\D3D12RHI\Private\D3D12Submission.cpp:907 
with error E_FAIL





UnrealEditor_D3D12RHI
UnrealEditor_D3D12RHI
UnrealEditor_D3D12RHI
UnrealEditor_D3D12RHI
UnrealEditor_D3D12RHI
UnrealEditor_Core
UnrealEditor_Core
kernel32
ntdll

What does this mean?

2 Likes
2

Hello there @ch00path1ng4!

Checking through the community, a few start up issues have appeared in relation with 5.6. Particularly, the error you are getting is tied to GPU issues, either software or hardware:

D3DCommandQueue->GetClockCalibration(…) failed with error E_FAIL

Let’s cover a few methods for resolution:

  • Refresh your nVIDIA drivers. Pick the “Clean Installation” option, as well as going for the “Developer” drivers, as these have more stable settings for engine work

  • Test switching between DX11 and DX12

  • Go to Windows Graphic Settngs, and set UE to High Performance

  • Since you recently updated to UE 5.6, try deleting all files from directory C:\Users\UserName\AppData\Local\UnrealEngine (make a backup just in case)

  • Access regedit, navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\GraphicsDrivers, and add a TdrDelay at value 60 (this will prevent the engine from “losing” your GPU)

  • Ensure your GPU is properly mounted, and no connection is lost with your motherboard

3

My computer has an AMD Ryzen 5 5600G with Radeon Graphics

It says all drivers are up to date, as well.

And 5.6 was a clean install, not an update.

1 Like
4

im having the same problem and have CPU AMD Ryzen 5 4500U with Radeon Graphics 6 Cores

1 Like
5

switching to dx11 should work. create a shortcut to ue5.6 and append " -d3d11" to target. Idk why its happening. I have Ryzen 3 3250u , up until now no problems but 5.6 crashes on startup if its dx12. Hope they fix it soon!

2 Likes
6

I am running into this issue at the program startup. It never loads any of the Initialization percentages.

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20250610_1224261600Ă—1200 167 KB

7

Hi there. I’m running into a similar issue with 5.6. Clean Install from the launcher, and it crashes immediately on startup on my laptop.

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image933Ă—931 109 KB

8

im having the same problem

9

Same issue on a laptop but after I open any menu.

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image1102Ă—1337 142 KB

1 Like
10

I think I found a fix. I disabled Optimization for Windowed Games and I disabled Hardware Accelerated GPU Scheduling and now it works as it should

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image1657Ă—830 25.3 KB

11

having the same problem

12

This is the answer!

AMD Ryzen 5 5500U with Radeon Graphics here.

The " -d3d11" worked perfectly for me.

13

having the same problem, maybe AMD? I use 6900xt

1 Like
14

I have the same issue and all of my things are up to date, I have NVIDIA GeForce RTX 3060 Ti and This card is capable of running Unreal Engine 5.6.

Do you know a solution, I need it for video game design and to finish my college courses the last school year

16

Solution is flagged.

Add [space]-d3d11 after the final quotation marks in the Target in Properties

1 Like
17

Please explain the solution in more detail. I just downloaded it and encountered this problem before I could even log in. I would appreciate it if you could explain it in more detail.

18

Awesome! It works. I’m so happy.

Unreal Engine shortcut in desktop → right click it → go to properties → locate Target → there you’ll have the path to the exe file within quotations ("). After it add a space then -d3d11

Example “c:\xxx\xxx\xxx\UnrealEditor.exe” -d3d11

Thanks ch00path1ng4 :wink:

1 Like
19

Also… Need to start through the shortcut. Not through Epic games.

20

It works. Thanks bro you are king.

21

The entire game runs the engine on DX11, but it was working normally on DX12 when it was in preview. After the update was released, it no longer works on DX12. Why?