Question R9 390x backplate 8g

[Eden96]

Hello! I have a videocard r9 390x backplate 8GB 512mb. So! My problem is when start my pc.
I start the PC all ok but when I have to actually enter the desktop the video card stops and no longer signals. This problem is only done when it is cold. If I let it warm up it wants 5-10 mins and I give it restart everything is ok.
I have a ga a75m ds2 motherboard with a6 3650 quadcore 2.6GHz. 12Gb ram and njoy agon600 PSU. What is the problem and how can I solve it.

 

[R4DIO4CT1VE]

thats quite strange.... I would be concerned of the card possibly beginning to fail in some way.