- Jun 1, 2013
- Gigabyte Z490 Vision D
- 5600XT & 6800 XT
- Mobile Phone
@Higgie did you hide the slot #1 via the relevant SSDT when booting macos? and where you able to boot mcos with the slot hidden from macOS?So, in a stroke of inspiration, I decided to see what would happen if I installed both cards in my PC (RX580 in Slot 2 and RX6800 in Slot 1 as normal) and booted Windows after Loading Optimized Defaults in the BIOS. I enabled XMP Profile 1 at the same time, and lo and behold - No more crash after logging in!
I've just booted up my most graphically intense game (Cyberpunk 2077) and had a quick run around and still no crash. I'm typing this now from within the same Windows session. Usually the computer would crash within 20secs-1min after logging into Windows if I have both cards installed. So there is either a setting, or a combination of settings that we use for booting MacOS that conflicts with Windows when it comes to having multiple GPUs in the case at once. I'm tempted to go through and enable each setting one by one to find the culprit, but for now I'm just happy that I won't have to open the case any more! I can just save a profile in BIOS for Windows, and one for MacOS.
Consider the Razer Core X definitely for sale!
I had my 5600 Xt in slot 1, then install my 6800 XT in slot 2, added the SSDT to hide slot 2 but I could not boot macOS. 50% in the boot sequence it crashed and the system reset. If I remove the 6800 XT but keep the SSDT to hide slot 2, I can boot macOS. And if I install only the 6800 XT in the system and do not hide slot 2, I can boot macOS but of course I have no acceleration.
I have not tried yet booting windows with 2 cards and slot 2 hidden. I wanted to make sure that I could boot macOS first.
I remember reading something on this forum about someone having 2 cards and the system crashing if the non supported video card in macos was in slot 2. did I read it correctly or am I dreaming ?