Ya I've given up waiting around for gpu encode/decode AV1 in dvdfab. I've upgraded my secondary gpu to the intel arc a770. the acer bifrost version. it was on sale for $330 awhile back.
works phenomenally well in handbrake. 1080 content gets around 330fps in 10bit encodes. about 150fps in 4k encodes.
also if you want to take a look the program FastFlix does nvidia av1 encoding now, it's also a free program
hoxlund
that’s seems to be a lot faster than my A380. I had wondered if the the other higher tier intel gpus would be better I think I get around 150fps at 1080p 10bit and I can’t really remember the 4k 10bit ones maybe 30 to 50fps. Though I can’t really moan about it as I use it as just the encoder for films anyway and not as the discrete gpu. Good to know that they are faster.