RTX 3090 NVEncoder hevc/4k 70fps delay 20ms

I use RTX 3090, NVENC API encoder hevc/4k 70fps, window 10, D3D11

  1. set “-tuninginfo”, “lowlatency”;
  2. set
    new NvEncoderD3D11(pDevice.Get(), nWidth, nHeight, NV_ENC_BUFFER_FORMAT_ARGB,0,false,false);
    it can one in one out,but delay 10-20ms;
    Is it possible to delay 3ms ?
    thanks !

RTX3090 encoder hevc 4k ,Is there a standard the minimum time delay ?