Alienware Aurora R3 + Asus Radeon RX 570 8Gb How to make them friends?

Question

Iron

The fact is that I have an Alienware Aurora R3 computer (Alienware 046MHW and Intel Core i7 2600K motherboard) and a Radeon HD 6870 1Gb video card, it works now via PCI express 2.0, 12 pin power supply. I bought a new video card Asus Radeon RX 570 8Gb, PCI express 3.0 8 pin power (fully working, tested on another computer).
BUT, when I leave this new video card in my computer, I have a black monitor screen (Samsung U28E590 R 28"), there is not even a BIOS boot!!!!!!
Has there been such a case in your practice? After all, the computer works without a new video card perfectly normal, and the new video card works fine!How to make them friends?

Answer 1

Update motherboard bios