Can't get a signal from my graphics card

I have built a new desktop PC, Everything is working fine except my Radeon RX 6750 XT graphics card. I've already sent one back thinking the graphics card was bad but the replacement is doing the same. When I turn on the PC nothing happens on my monitors. You can hear the sounds of the computer going through the normal boot up. I'm currently using the little graphics card (AMD FirePro W2100 that only supports 2 monitors) from my old PC so I can use my newly built PC. Here is a list of the hardware:

3 Acer - Nitro QG271 (2 where being used on my old PC while the third collected dust)

Asus TUF Gaming X570-Plus

AMD Ryzen 7 5800X

Thermaltake Toughpower Grand Series 850W power supply

1TB Samsung 980 Pro PCIe 4.0 NVMe M.2 SSD

2X8GB Corsair Vengeance RGB RS



I'm out of ideas, I've ensured there are 2 8pin power cables from the power supply to the card. The fans on the Card spin so there is something going on. The onboard LED diagnostics lights indicate and issue with the graphics card. It can't be the monitors, cables, or PCIe port because I'm using them right now. Everything works fine...I turn it off...move the PCIe relocation cable (the case is funny so I can't put it directly to the motherboard so the case came with a relocation cable) from the FirePro to the 6750 XT and it all goes to crap. I'm at a loss right now. Is there something simple I'm overlooking?

veeg said:

Hello

Did you install the chipset drivers for the mobo?

Click to expand...

I did not but I think my riser cable might be Gen 3 where the graphics card requires Gen 4. I can't find any markings on it but I plan to buy a new cable that will hopefully fix the issue.