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Unfortunately, there is nothing that you can do: QuickSync encoding is currently limited to around 24 Mbps. If you go far above that, the encoder WILL default to a 4 Mbps rate. So the only way to encoder at such a high bitrate would be to disable hardware acceleration and go with software only in the encoding settings.
This is odd, because I have tested numerous times, and sometimes it can go to 62MBPS (though the behavior is erratic and unpredictable).
Separately, is it possible to use NVENC in Adobe Media Encoder?
Also, is there any HW acceleration for H265 in AME?
There is hardware HEVC (H.265) acceleration in both Premiere and AME, starting with 12.1.x – but it requires a 7th-generation or later Intel CPU with QuickSync support. Your CPU is only a 6th-generation Intel I series CPU.