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. PS: Now it does not signal anymore after it warms up.