I have save same problem on my Catalina 10.15.7 and OC 0.6.2. I read on other forum that problem is in OpenCore 0.6.2 and 0.6.1 it work on 0.6.0 and I confirm it work.
I add in S/L/E and on OC/kext and Wireless work like charm , I'm not have vanila kext on S/L/E to take it back.
FINALY i find solution for 570 / 580 / RX590. Just Add SSDT and restart
WORK perfect on Clover and Opencore
Geekbench 5 metal score are higest then ay other method did I try. EVEN WITHOUT SLEEP.
Same result same score before and after sleep.
please check it and write feetback.
I have other problem with my RX580 . before sleep GPU memory are loading slowly to full 96% take about 12-20hour. after sleep GPU memory are empty till 5-10% ( that should be normal ) and again grow slowly.
I use only WEG/Lilu without any add device. smbios 19.1 z390 / 9900k
Hi to all.
I have a very old machine with Gigabyte G31 - Xeon X5460, 8Ram . GT740-2GB GK107 chip.
So I use legacy boot and SMBIOS 14.2. I try and other SMBIOS like 13.1;13.2;14.1;imacpro1.1;macpro5.1 but same result at all.
Card are work great except H264,
I use 2 monitor - DVI + HDMI , also...