AV1 Encoding--CQP vs ICQ Mode

[wwaag76]

Just did some AV1 test encodes using CQP and ICQ modes with the same factor--28.
For ICQ, the resulting bit rate of the rendered file was 13 Mb/s which seems reasonable. However, for CQP mode, the bit rate was 63 Mb/s, roughly 5 times as large and more than twice the bit rate of the original file.
Is this correct? It would appear that CQP mode may be using 0-256 rather than 0-51.

[rigaya]

Yes, AV1 CQP range is 0 - 255.

[wwaag76]

Thanks. One other question. What are the correct CQP and ICQ ranges for VP9?

[iccfish]

Thanks. One other question. What are the correct CQP and ICQ ranges for VP9?

Seems 0-51.

[Discograp]

for me

for VP9/AV1 from YouTube

CPU x265 with color range FULL encoded better and from GPU in terms of image quality and FPS (avisynth) Nvenc with color range FULL
and the Intel GPU turned out to be useful when activating TFF/BFF and VPP and VUI, without them it is useless