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Sapphire R9 390 Nitro 8GB Troubleshooting

Hello guys, I'm looking for help on an issue I'm having, I recently bought a Sapphire R9 390 (I don't know if it's the 390 or 390x ) 8GB graphics card (I bought it for $100 locally because I was looking for a cheap GPU while I get a RTX 3080 or 6800XT)

The guy that sell me the card try it in front of me and the card worked perfectly but when I put in in my PC I doesn't work, I have no video signal of any of the ports (except for DVI I haven't tried that one because I don't have a neither a DVI cable or monitor 


I've tried on 2 different displays: 1. LG 34UC80-B (3440x1440) I tried both HDMI and DP and the other monitor is 2. LG 27UD58-B (3840x2160) also i tried HDMI and DP


The card seems to be fine because it is warm (not hot) to the touch when the PC is turned on, the fans don't spin (I have had other triple fan cards that on idle the fans won't spin so I don't know if this is normal or if it's an issue) I have tried all of the PCI slots of my motherboard, I've tried the card on 2 of my PC's, I've tried pressing the BIOS button on the card and it lights up blue but thats it, I have tried using 1 double 8pin power conector and 2 8 pi  single power cables and nothing... i don't know if the card is damaged or whats my issue so if any of you could help me i would really appreciated 

Here are the specs of the 2 PCs i have tried the GPU on:


1st System:


CPU: Threadripper 2950X 

CPU Cooler: Deep Cool  Castle 360

Motherboard: Gigabyte X399 Aorus Xtreme

RAM: 64GB Corsair Dominator Platinum RGB 3000MHz C15

Storage: Samsung 1TB M.2 Nvme

Powe Supply: EVGA SuperNova G3 1000W 80+ Gold

OS: Windows 10 Pro




2nd System:


CPU: Threadripper 1950X 

CPU Cooler: Cooler Master Wraith Ripper Air Cooler

Motherboard: AsRock X399 Phantom Gaming 6

RAM: 48GB Teamgroup T-Force Night Hawk 3200MHz C16

Storage: Arata 1TB M.2

Power Supply: Asus ROG Strix 850W 80+ Gold

OS: Windows 10 Home






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