I'm quite tired, because I have no clue of what else I need to try to see if my rig will finally work as intended.
I have 5 graphics cards: 2 RX 480 and 3 RX 470. Some (2 RX 470) are with the BIOS modded, some not.
Regardless of enabling the aforementioned setting or not, I'm unable to have my rig fully working (that is, with all my GPUs being recognized), with the difference that with the above 4g thing Windows 10 won't even boot and my PC crashes completely, with lots of artefacts.
I'm using the newest drivers, Windows 10 64 bit, motherboard MSI Gaming Pro Carbon, 8GB RAM and USB powered risers. I have tried with both a SSD and an used SATA HDD, with no success. Please somebody help me out, because I'm extremely confused/upset/sad/etc... I have wasted a lot of hours trying to make it work. Cheers!