Low fps in vrchat for a strange reason

Vrchat is not fully using my computer due to which my fps is very low.
The processor load (xeon e5-2650v2) is maximum 60% and the load is distributed evenly across the cores, similarly with the video card (gtx 1660 ti oc) its load is 30-65%. Because of this, on instances with 25 players the total is 26 fps, and on empty worlds with small requirements the maximum is 36 fps. Meanwhile, a person with an rx580 and an i7-3770 on an instance for 30 people produces a stable 40 fps, when I have 20-25 fps there.
vr: quest 2 with steam link.