Nice shots! Have you turned any of the useless features off? I have, and it resulted in playable frame rates all the time at 6200x1080. between 35 and 60 fps with vsync/triple buffering enabled via Control Panel. In-game Vsync caused a few problems, so I used the CP settings and it ran faster as a result.
+r_UseEdgeAA=0 +r_PostMSAA=0 +r_DepthOfField=0 +r_motionblur=0 +r_DrawNearFoV = 80 +pl_movement.power_sprint_targetFov = 80 +g_skipIntro=1 +i_mouse_accel=0 +cl_fov 80 +rDrawNearFoV 80 +i_mouse_smooth 0 +pl_aim_acceleration_enabled 0
Those are the settings I use to increase my framerate.