MP All Models Can get my monitor to work since upgrade

[macnet1]

OK so I have a Mac Pro (Circa 2012) I've upgraded to Mojave and with that had to upgrade the card, in this case, it was to a Radeon RX 560. This is the challenge I use an Acer monitor to view ok, but my main Mac Pro monitor with adaptor for the card does not fire up. It used to with the old video card. I've tried everything under the sun and no luck. I wonder if anyone else had the same issue and found a resolution.

Many thanks in advance friend

Cheers
Macnet

Mac is:
3.2 GHz Quad-Core Intel Xeon &
24 GB 1066 MHz DDR3


Video card is:
Radeon RX 560:

Chipset Model: Radeon RX 560

Type: GPU

Bus: PCIe

Slot: Slot-1

PCIe Lane Width: x8

VRAM (Total): 2 GB

Vendor: AMD (0x1002)

Device ID: 0x67ff

Revision ID: 0x00cf

Metal: Supported, feature set macOS GPUFamily2 v1

 

[tsialex]

Read the note about black screens with Polaris cards on the first post of the MP5,1: What you have to do to upgrade to Mojave (BootROM upgrade instructions).