x870e motherboard ASUS ProArt X870E-CREATOR WIFI - Ryzen 9950x

[carlo_67]

Put the 4090 in the PCIe x16_1 slot Place the second GPU in the PCIe x16_3 x4 slot, but I doubt you'll have room at the bottom to insert it.

 

sorry my english

[fabiosun]

@khileare you sure that rx6600 is full working?

have you tried it with other os?

[khile]

26 minutes ago, fabiosun said:

@khileare you sure that rx6600 is full working?

have you tried it with other os?

so moved to slot 3 on pci-e and still not seen by Mac but works fine in windows and I can mirror or set it as main display and it works fine 

[carlo_67]

Is the resize bar enabled in the BIOS? Also run a CMOS to force detection and reset the NVRAM on the Mac, reboot from Mac and see what the card says under Information/Graphics and Monitor. Basically, it should see it. I get an error without WhateverGreen.kext.

however it is the 4090 that predominates the slots, you have to try to temporarily remove it and try only the 6600 in pcie 1, once the mac is started insert it in the device properties of Opencore and put the boot arg nv_disable, put them back as they are now and try to start

[Muhammed Salah]

Please Update EFI Folder to support macos 26 installer

[khile]

so if i only have the 6600 in slot one the pc sees it no problem but as soon as i have the 4090 in any slot the  6600 is no longer seen

 

i do have all the m.2 slots populated  as well

 

 

[fabiosun]

i think your CPU lacks of some PCIE lanes...

and this is a problem

usually motherboard loose a nvme slot

in your case seems differemnt