UE4 4.22.1 raytracing noise?

Hi guys,

So when I dial up my sample rates for ray tracing reflections, I get lots of noise in my reflections, setting pixel sample rate to 1 just gives really bad quality relfections, and any more than 3-4 gives me like 10 fps? I have a RTX 2070, what am I missing? Is there a denoiser plug in?

Thanks for anyone who can shed light on this.