The latest beta of OC, 0.7.5, has an option that fixes the Smart Access Memory / Resizable Bar issue, i.e it can be left enabled whether you boot macOS or Windows. I'm sure @CaseySJ will include this in his configs when 0.7.5 is officially released.
If you don't want to wait a week or 2 then...
Do you dual boot Windows by any chance? If so then you will probably have to do a cold reboot after going into Windows and before booting macOS.
Windows loads its own firmware onto the bluetooth module when it boots and macOS does not overwrite it with its own firmware. Often only way to clear...
If memory serves me right, in your config.plist file try changing
PlatformInfo/UpdateSMBIOSMode from Create to Custom
Kernel/Quirks/CustomSMBIOSGuid = YES (if using OpenCore Configurator tick the box).
After you have been in Windows, it is often necessary to do a full COLD boot to get Bluetooth and/or Wifi working properly in macOS.
Windows installs its own firmware to the BT/Wifi module and the only way to clear it so macOS can install its own version is to cold boot.
Simply unplug the...
Plenty of 6700XTs (£650 upwards) & 6600 XTs (£430 upwards) in the UK on the usual sites. Given the current climate that isn't too bad for us. As usual, we are ripped off with the exchange rate of $1=£1 on computer gear :-X. Way more than they MSRP though :thumbdown.
You will get an output from virtually any GPU, be that Nvidia or AMD. But, unless it is a supported one you will only get a basic output using the bog standard VGA driver, i.e no acceleration etc.
You can, of course, have both cards installed but just disable the slot the RTX is in when you...
@CaseySJ has kindly supplied SSDTs to disable slot 1 or 2 in THIS thread, in post 1. Add one or the other SSDTs, depending on which slot you put the 1070ti in, to Opencore and enable it in your config.plist file.
Random reboots on AMD hacks are often down to an incorrect MMIO Whitelist. The Whitelist is usually different for each motherboard, even those by the same manufacturer. It also often changes with each BIOS revision.
You should discover what yours are, using the Debug Version of Opencore, do the...