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Question PC black screens, then only one monitor works ?

Jul 17, 2021
So whenever I turn on my pc and try to open discord, steam or turn on a game, whatever program I opened freezes then my monitors disconnect for a second and then one of them will turn back on right away but the other 2 monitors I have will stay disconnected to the pc. This happens when my pc has just booted up but if I leave my pc for an hour or more (honestly it's pretty inconsistent) it stops having the problem and runs everything normally without having any issues at all. Honestly I'm stumped on why this is happening. I looked around and I'm not sure if anyone else has had a problem like this. I feel like this might be a PSU issue or a GPU issue but it doesn't really make sense to me that the problem disappears if I leave my computer running for a long period of time.

Desktop Specs:
Intel i7-7700K
NVIDIA(R) GeForce(R) GTX 1070 with 8GB GDDR5
256GB M.2 PCIe SSD (Boot) + 2TB 7200RPM SATA 6Gb/s
Alienware(TM) 460 Watt Multi-GPU Approved Power Supply with High Performance Liquid Cooling

If someone could help me out here that'd be great.