How can I get rid of the noise in unreal 4.22?

Development Rendering
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1

Hi ,
I am using UE 4.22 with RTX 2070 . I have activated ray tracing ( -dx 12) . And start seeing noise at global illumination.
Knowing that increasing SamplesPerPixel can bring down the noise . But my fps go down dramatically.
And r.Ray Tracing .Globalillumonation.Denoiser=1 show no effect.
Can someone help me out ?
Regards

2

I have the same problems. Unfortunately RTX Global Illumination is not usable at the moment.