GPU acceleration works in one project but not the other?

[Roxanne26555774c10h]

I have a project which works fine. I have made a copy so as to alter ratios and now one of the clips has the dreaded warning 'This effect requires GPU acceleration' I have opened the original and it remains fine. I've re imported the original cip into the new project and it continues with the warning. How on earth do I fix this, any ideas?

Windows11

prem 2024

RTX 3070

1. project 01 continues to work fine

2. Project 2, exactly the same but differrent ratio  'This effect requires GPU acceleration'

3. Project 01, continues to works fine

4. import clip from project 01 to Project 02-  'This effect requires GPU acceleration'

[Ann Bens]

Please do not double post on same subject.

Locked.

continue here: https://community.adobe.com/t5/premiere-pro-discussions/gpu-acceleration-works-in-one-project-but-no...