The video card is not loaded at 100 percent (The Witcher 3: Wild Hunt)

after the release of the next-gen patch in the witcher, the fps dropped sharply, even at low ones it did not increase more than 30, then it turned out that the video card in the witcher only works at 45% and the percentage does not rise above and because of this 15-30 fps. What to do to consume 90-100%? In rdr2 everything is fine, 97% is consumed and 70 fps
video card - nvidia gtx 1660
processor - intel xeon E5-2630 v2
RAM 16gb