No FPS drop when active Raytracing


I have Raytracing ON + windows (dx 12)+ gbuffer (high precission normals) + reflections (1024) + shadow (remove preview render).
HDRi backdrop.

Raytracing settings:

Raytracing global illumination enable, samples per pixel 1
RT reflections enables, Max roughness: 0.6
shadows: area shadows
RT translucency: enable (0.6)
area shadows and sample per pixel 1 and checked refraction

But I see no difference in FPS when RT active.

What I´m missing?

I own a gtx 1070 with 4.42 drivers. (not gaming ones)

Restart solves it.