Why my ue4 so lag and what is this?

Hello Windranger,

Your description is quite vague. In order to understand this better I would like some more information from you.

1.) Can you link me a copy of your DxDiag?
2.) Is this your own blank project or one created from a template?
3.) Is this version of Unreal from the launcher on Epic’s site or from GitHub?
4.) Is this a project copied from 4.8 to 4.9?

After I have this information I will be able to assist you further.

  1. link text
  1. my own blank project
  2. from epic launcer v4.9.2
  3. from 4.9 to 4.9.2

We are still currently working on support for DirectX 12.

Our recommended workflow is to work with Directx 11 and see if this fixes the artifacts you are seeing.