So I'm new to tinkering, started really playing around after my computer had an issue with overheating. I made a post about it and it seems my computer is running fine again. However a piece of me keeps thinking it's still having problems, especially whenever I see an occasional lag spike in game. I'm learning about Afterburner's features and turned on the on screen display for Resident Evil 2 and noticed it's saying my GPU is not getting enough power. However the game is working perfectly fine on recommended settings with clock speed of 1700 on the GTX 1080, 90 FPS, and temperatures around 80° without undervolting. I'm surprised at the no load warning when it's taking up 99-100% of the GPU.
I'm wondering if I really am having a power issue and my computer could be performing better? I even bought a new brick power source for it after the incident that first caused me problems. Back then what occurred is the computer kept beeping and switching between plugged and unplugged settings despite being plugged in the whole time. This sort of thing happened often for a few minutes and go away by itself, but then one day after a full day of hardcore gaming and overheating it kept doing the

beeping until the next day and then finally stopped and never happened again. The warranty already expired so I'm wondering if there is an issue and how do I fix it, or is it just an error on Afterburner's end and all the stats seem to be fine?