I don’t know if you encounter the same situation: my monitor starts flickering after loading the MSFS2024 SU4 Beta.

A quick solution is to either set:

1) “Nvidia DLSS Super Resolution” for Anti-aliasing and “NO” Frame Generation, or

2) “AMD FSR3” for both Anti-aliasing and Frame Generation.

The TAA can be used.  Just don’t mix the Nvidia and AMD together.

Not sure if the conflict is a temporary one or not.  I hope it is because I’d been mixing the Nvidia and AMD options together with good results.

P.S.
The SU4 Beta looks good in many aspects but overall this first beta is still a bit unstable and takes longer time to load some flight sessions in general.