As a note, AMD 7000 series GPU for AV1 encode, the encoder is flawed and can only produce factors of 64x16 pixels, as well as a special 1920x1082 ratio. If your have a lot of 1080p content, it will be recorded with two lines of black pixels on the left and right, and then set to crop it out on video playback.
Just something to keep in mind if you go with that series of GPUs.
Actually, they only validated up to 4xs in the product name, so take the 5x result with a grain of salt, one of the Xs aren’t validated.