RTX 20 series NVENC Spec

Does anyone know where I can find this info? All I can see from Nvidia website is that RTX 20 series are using Turning encoder, and all of RTX 2060, 2070 and 2080 have 1 NVENC and can run 2 sessions concurrently. My question is, do they have the same encoding speed in terms of number of pixels per second?
For reference, the Jetson AGX Xavier listed their encoder’s processing speed as X MP/s: some have 1000MP/s and some are just about 500MP/s, so I’m assuming there could be difference in the actual throughput even if they are all Turing encoders.