Lt_Welkin
once I go any form of fullscreen, I get dropped frames
Lets test your GPU weakness.
Try values DXVA2 or Bilinear of settings: chroma upscaling, image upscaling, image downscaling (madVR settings - scaling algorithms).
Show your madVR statistic in fullscreen mode (ctrl-j hotkey) if issue still there.
And show SVP additional information (SVP tray menu - Information - Additional information).