My ROG 3080 has the 3 red lights blinking on top of where you plug the power cables in which I have seen means it is not getting power delivery.
My build is as follows:
CPU: Ryzen 7 2700x
PSU: Corsair RM850x
Case: CoolerMaster H500M
Cooler: CoolerMaster ml240 phantom
RAM: G.SKILL 32 gb 3600
Mobo: ROG Crosshair 7
SSD: Samsung 870 EVO 1 TB
HDD: WD Blue 4TB
GPU: ROG 3080
My build is as follows:
CPU: Ryzen 7 2700x
PSU: Corsair RM850x
Case: CoolerMaster H500M
Cooler: CoolerMaster ml240 phantom
RAM: G.SKILL 32 gb 3600
Mobo: ROG Crosshair 7
SSD: Samsung 870 EVO 1 TB
HDD: WD Blue 4TB
GPU: ROG 3080