Graphics card shuts down pc.

[derGraph]

I have upgraded my PC:

Xeon X5650 -> Ryzen 5 5600X

Old Serverboard -> b550 Pro VDH WiFi 

Mixed 6x2gb Ram -> Kingston HyperX Fury 6x 8GB 2400MHz 15CL

And kept my earlier upgraded 

Radeon Rx580 8gb and LC Power LC6550 550W Power Supply.

I connected everything up in the case and if I start the system I get a VGA Led on the Motherboard, the GPU fans spin, but after some seconds it shuts down and starts again, I never came further than bios.

What I tried:

-Bios Upgrade via Flashback

-old GPU(worked fine)

-old Motherboard+CPU(worked fine)

-replug(nothing changed)

-only one RAM stick (nothing changed)

-PCiE down to 3(nothing changed)

-dedicatet GPU PSU

 

 

 

 

 

 

 

 

Edited August 7, 2021 by derGraph
Changed what I tried list

[Mark Kaine]

13 minutes ago, derGraph said:

old GPU(worked fine)

what GPU?

 

and basically you're saying everything works *except* the 580 (which previously worked in anothor  build)?

 

 

 

[derGraph]

I tried the rx580 on a old build after I put it in the new one and it worked fine

[RelytX]

I had the same thing happen to me a couple of weeks ago, it was my psu tripping the over current protection. Upgraded my psu and no issues. 

[derGraph]

3 hours ago, RelytX said:

I had the same thing happen to me a couple of weeks ago, it was my psu tripping the over current protection. Upgraded my psu and no issues. 

Would it be possible to put a Capacitor on the 12V rail to smooth out the heavy loads?

[derGraph]

I used an other PSU just for the GPU, but this didn't help