No display after changing gpu

[XFire]

I built a new pc and i put my gpu : RX 580 and there is just a black screen. But when i put another gpu , a gtx 750 the display shows perfectly fine . i  have b550m pro-vdh motherboard. Has anyone had this problem and how can i repair this?

[OddOod]

Welcome to the forums!
Those are both pretty old cards, but they are from different manufacturers. Did you DDU when you swapped?

[XFire]

4 minutes ago, OddOod said:

Welcome to the forums!
Those are both pretty old cards, but they are from different manufacturers. Did you DDU when you swapped?

Yes i did right now again and it still doesn’t work 

[OddOod]

Good.
How sure are you that the 580 is actually working? 
Also, I assume you've plugged the power cable into the top of the card, right?

[XFire]

1 minute ago, OddOod said:

Good.
How sure are you that the 580 is actually working? 
Also, I assume you've plugged the power cable into the top of the card, right?

I tested it on another pc. yes I plugged the power cable and it works on another pc 

[OddOod]

Awesome. Specs of PC? Include make and model of PSU

[XFire]

On 2/4/2025 at 3:37 PM, OddOod said:

Awesome. Specs of PC? Include make and model of PSU

Aqirys 750w , 16 gb ram 3200mhz , amd ryzen 5500

[OddOod]

I'm suspecting the PSU, but I know that board has debug LEDs, are any of them lit when you try to boot?
Also, I assume you're plugging in the PCIe power cable to the 580

[XFire]

10 minutes ago, OddOod said:

I'm suspecting the PSU, but I know that board has debug LEDs, are any of them lit when you try to boot?
Also, I assume you're plugging in the PCIe power cable to the 580

I tried removing the cmos and it starts with the boot light and nothing happens 

[OddOod]

19 hours ago, XFire said:

I tried removing the cmos and it starts with the boot light and nothing happens 

Okay... So clearing CMOS didn't help, but that's not surprising. 
So, when you boot, the Debug LEDs *start* with BOOT and don't move at all? That's very odd. My best guess is that that no name PSU is causing some sort of brownout on the mobo and it's not even *starting* to POST correctly. 
My recommendation would be to test with a different, better PSU. Perhaps the one from the tower in which you tested the card?