RX 480 not detected

[PullHomer]

I bought a XFX RX 480 RS 8gb and installed it into my Gigabyte ga-h110m-s2h, but it seems like the system really doesn't want to detect it.  I can guarantee the mobo has a PCI-E 16x slot (it doesn't have a space for the left yellow hook, but the card is not loose). Fans are working and a blue led lights up, proof that the card is correctly powered and the mother-board and the power supply are actually giving power to it.  

Booting up the PC no signal is given and when checking the device manager with integrated graphics no dedicated GPU  is detected.

What could it be? A mother board problem? A GPU problem?.

[3 Lions]

What is your PSU? 

[PullHomer]

7 minutes ago, LinusTechTipsFanFromDarlo said:

What is your PSU? 

It's a Corsair VS550 550W

[EPPHO]

Try different connection method. Connector might be faulty

[Aniallation]

Have you tried any other GPU with this motherboard?

[PullHomer]

1 minute ago, frozeNNN said:

Try different connection method. Connector might be faulty

What do you mean? I have only one PCI slot and I tried with different pins.

[PullHomer]

1 minute ago, Aniallation said:

Have you tried any other GPU with this motherboard?

I don't have other cards, but I could get a cheap/borrowed one and test the mother board

[EPPHO]

2 minutes ago, PullHomer said:

What do you mean? I have only one PCI slot and I tried with different pins.

Not that,i mean connector for the monitor.

[PullHomer]

Just now, frozeNNN said:

Not that,i mean connector for the monitor.

I tried both HDMI and Display Port

[DarkBlade2117]

Does your PC work with the iGPU? (If you have one).

If it does, could be 1 of 3 things.

Faulty RX 480

Faulty PCIe Slot

PSU isn't good enough

[EPPHO]

Try it in other pc

[EPPHO]

And also have you tried resetting cmos?

[PullHomer]

6 minutes ago, frozeNNN said:

And also have you tried resetting cmos?

Already done

[PullHomer]

22 minutes ago, DarkBlade2117 said:

Does your PC work with the iGPU? (If you have one).

If it does, could be 1 of 3 things.

Faulty RX 480

Faulty PCIe Slot

PSU isn't good enough

It works fine with the IGPU

[Aniallation]

Either try your card in a different PC, or someone else's card (known working) in yours. That way you can rule out what's broken.

[Aniallation]

12 hours ago, DarkBlade2117 said:

Does your PC work with the iGPU? (If you have one).

If it does, could be 1 of 3 things.

Faulty RX 480

Faulty PCIe Slot

PSU isn't good enough

If PSU wasn't good enough it would cause instability (sudden shutdowns) but would still boot up fine if all power connectors are getting 12V and ground