dears
upgrade from catilina 10.15.7 to Big Sur without any issue. first download of Big Sur failed after 90%, then it downloaded 11.3 form apple succesfully and i upgraded to 11.4 afterwards. My new Radeon 6900XT is recognized from mac 11.4, seem to work fine!
i used the EFI from Spartan711, works fine what i see, at the moment without CFG lock option. SMBIOS i left to my 18.3 due to historic reason, my existing serial and UUID works great with icloud. if i change SMBIOS, i need probably new serial, uuid and log off icloud first. When i installed this pc, the 19.x SMBIOS did not exisit. so remain on 18.3 for now.
upgraded to OC 0.71.
if the radeon is really used for video file conversion etc i need to check. also DRM here not working. finetuning to come.
question: does the cfg lock bios / setting have any negative effect on my native windows boot ?
thanks again.