i had the same problem. RTX 2060, Ryzen 7 2700x, 32G ddr4 2800. Low gpu useage no matter what settings are used. FPS locked at 17-19. Turns out ram speed was the bottleneck somehow. Got into BIOS made sure XMP was on (it was) and bumped the memory setting to 3066, save and exit. So far that seems to ave worked very well. High settings 1440p and getting 60 fps where I have it limited to. Hope this helps.