I have Rk3318 - H96MAX 4/32
Yes, I've already done that. It turned out to change the frequency range from 408 to 1392 Mhz. Before that, I cooled it well. I added a 40x50x2mm copper plate, and glued a radiator with a cooler on it.
Everything works, except the LED display. I'm reading how to transfer to emmc